2011年第42卷第12期共收錄43篇
1. Accession number:20120214672705
Title:Effect of field excitation on cutting quality for sugarcane
Authors:Lai, Xiao1 ; Li, Shangping2 ; Ma, Fanglan3 ; Zhou, Jinghui1 ; Li, Wan3
Author affiliation:1 Light Industry and Food Engineering Institute, Guangxi University, Nanning 530004, China
2 Qinzhou University, Qinzhou 535000, China
3 College of Mechanical Engineering, Guangxi University, Nanning 530004, China
Corresponding author:Li, S. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:97-101
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Mechanism of field excitation impacted the quality of sugarcane cutting were analyzed through virtual simulation analysis and physical experiment based on typical sugarcane field excitation signals acquired by virtual apparatus. The experiment result showed that sugarcane field unevenness had the vibration of the cutter, and the higher the frequency, the more deteriorated the sugarcane cutting quality.
Number of references:7
Main heading:Experiments
Controlled terms:Agricultural engineering - Mechanical engineering - Sugar cane
Uncontrolled terms:Cutting quality - Field excitations - Physical experiments - Simulation - Virtual simulations
Classification code:608 Mechanical Engineering, General - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 901.3 Engineering Research
Database:Compendex
2. Accession number:20120214672729
Title:A parametric template-based design for 2-D section feature
Authors:Bao, Jingru1 ; Zhang, Xiangkui1 ; Guo, Wei2 ; Hu, Ping1
Author affiliation:1 State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China
2 College of Materials Science and Engineering, Jilin University, Changchun 130022, China
Corresponding author:Zhang, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:225-230
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To enhance the efficiency and stability of die-face design, a parametric optimization method based on the template of section feature was proposed. The 2-D section feature was generally represented in NURBS form while its characteristics were systematically analyzed. Then, an optimization algorithm was designed with a simple and effective editing strategy. With the algorithm integrated into the independently developed DCiP forming analysis system, a comparison with HyperForm Die Module was made. The results showed that the proposed method could avoid abnormal problems, and had great ability to simplify user operations and shorten product design periods.
Number of references:8
Main heading:Algorithms
Controlled terms:Electric network parameters - Optimization - Product design
Uncontrolled terms:Automobile panels - Editing strategy - Forming analysis - Optimization algorithms - Parametric design - Parametric optimization - Section feature - Template-based
Classification code:703.1 Electric Networks - 723 Computer Software, Data Handling and Applications - 913.1 Production Engineering - 921 Mathematics - 921.5 Optimization Techniques
Database:Compendex
3. Accession number:20120214672707
Title:Performance of two-phase gas-liquid electrostatic induction nozzle
Authors:Zhang, Jing1 ; Gong, Shuai2 ; Song, Jianli1 ; Zhou, Jizhong1 ; He, Xiongkui1
Author affiliation:1 College of Science, China Agricultural University, Beijing 100193, China
2 Institute of Plant Protection, Shanxi Academy of Agricultural Science, Taiyuan 030032, China
Corresponding author:He, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:107-110 120
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The performance research on a two-phase gas-liquid electrostatic induction nozzle was carried out in the lab. The results showed that the droplets deposition and coverage ratio on the upper leaf surfaces achieved by electrostatic spraying were increased by 43.03% and 22.07%, respectively. The coverage ratio on the down leaf surfaces was up to 30.95%; when gas flow rate was 1.4 m3/h, liquid flow rate was 60 mL/min, voltage was 1000 V, charge-to-mass ratio could reach to 3.2 mC/kg, which was high enough for electrostatic spraying. The optimum work parameters were: gas-liquid ratio of 0.18, spraying angle of 0°, and voltage of 1000 V.
Number of references:15
Main heading:Liquids
Controlled terms:Electrostatics - Flow rate - Gases - Nozzles
Uncontrolled terms:Charge-to-mass ratios - Coverage ratio - Electrostatic induction - Electrostatic spraying - Gas liquids - Gas-liquid ratio - Leaf surfaces - Liquid flow rates - Performance research - Spraying angle - Upper leaf
Classification code:631 Fluid Flow - 631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 931.2 Physical Properties of Gases, Liquids and Solids
Database:Compendex
4. Accession number:20120214672724
Title:Analysis of criterion number of heat transfer in micro combustion process
Authors:Pan, Jianfeng1 ; Zhou, Jun1 ; Tang, Aikun1 ; Shao, Xia1 ; Xue, Hong2
Author affiliation:1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
2 Mechanical Engineering Department, California State Polytechnic University, Pomona CA91768, United States
Corresponding author:Pan, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:197-201 219
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In the micro-scale conditions, due to the heat transfer coupling with the combustion process within the micro-combustor, the convection and heat transfer in the micro-combustor were rather complicated issues. Based on the simulation results of the flow, heat transfer and combustion process in the micro-combustor. Dimensionless analysis method was used to calculate the dimensionless Nux number which described the convection and heat transfer intensity in the channel cross-section away from the entrance at x. Then effects of inlet parameters on the dimensionless Nux number were analyzed. The formula between the dimensionless variables θ and average Nux, Rex, Prx numbers in the channel cross-section was obtained by multiple regression analysis.
Number of references:16
Main heading:Heat convection
Controlled terms:Combustion - Combustors - Regression analysis - Statistics
Uncontrolled terms:Combustion pro-cess - Convection and heat transfer - Dimensionless analysis - Dimensionless number - Dimensionless variables - Micro combustion - Micro-scales - Multiple regression analysis
Classification code:521.1 Fuel Combustion - 521.2 Combustors - 641.2 Heat Transfer - 922.2 Mathematical Statistics
Database:Compendex
5. Accession number:20120214672698
Title:Robust controller design for energy control system of hybrid electric vehicle
Authors:Hu, Chunhua1, 2 ; He, Ren1 ; Li, Nan1
Author affiliation:1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
2 Department of Electronics and Information Science, Zhenjiang College, Zhenjiang 212003, China
Corresponding author:He, R. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:62-66
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To prevent energy control system from mistaking switching during its operation mode for series-parallel hybrid electric vehicle (HEV) when interfered, a mixed sensitivity H∞ robust controller was developed. Weighted functions were determined based on genetics arithmetic. Compared with the PID controller under step response, the mixed sensitivity H∞ robust controller reduced the settling time by 41.3% and overshoot by 14.7%. It also could keep energy control system stable under the two factors of uncertain parameters and external interference. Mistaking switching operation was restrained effectively and more smooth driving performance was acquired.
Number of references:10
Main heading:Controllers
Controlled terms:Automobile drivers - Electric vehicles - Power control - Robust control - Secondary batteries - Three term control systems - Uncertainty analysis
Uncontrolled terms:Driving performance - External interference - Hybrid electric vehicle - Mixed sensitivity - Operation mode - PID controllers - Robust controller design - Robust controllers - Series-parallel - Settling time - Switching operations - Uncertain parameters - Weighted function
Classification code:432 Highway Transportation - 702.1.2 Secondary Batteries - 731 Automatic Control Principles and Applications - 732.1 Control Equipment - 922.1 Probability Theory
Database:Compendex
6. Accession number:20120214672727
Title:Position analysis of 3-UrSR parallel mechanism with 6-DOF
Authors:Yu, Qikai1, 2 ; You, Youpeng1 ; Han, Jiangyi3
Author affiliation:1 Jiangsu Provincial Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2 Mechanical Department, Nanjing College of Chemical Technology, Nanjing 210048, China
3 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:You, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:215-219
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A parallel mechanism named 3-UrSR was proposed. It used 2-DOF spherical five-bar mechanism as the compound drive device. The mechanism freedoms were calculated, and the mechanism inverse solution was analyzed. The equations of forward solutions to positions were established. At last, the results of forward solutions was numerical verified by inverse solutions, and the simulation example and figure of mechanism positional posture numerical were given.
Number of references:13
Main heading:Mechanisms
Controlled terms:Agricultural engineering - Mechanical engineering
Uncontrolled terms:6-DOF - Drive devices - Five-bar mechanism - Inverse solution - Parallel mechanisms - Position analysis - Simulation example - Workspace analysis
Classification code:601.3 Mechanisms - 608 Mechanical Engineering, General - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
Database:Compendex
7. Accession number:20120214672718
Title:Effects of ultra-high pressure and carrageenan on gelling properties of surimi from silver carp, hypophthalmichthys molitrix
Authors:Lu, Jianfeng1 ; Shao, Mingshuan1 ; Lin, Lin1 ; Ye, Yingwang1 ; Chen, Conggui1 ; Jiang, Shaotong1
Author affiliation:1 College of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Lu, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:164-170
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Surimi gel added with carrageenan from silver carp (Hypophthalmichthys molitrix) processed by ultra-high pressure (UHP) and a two-stage heat treatment was formed. The gel strength, whiteness and pH values were measured, respectively. The effects of pressure, time and carrageenan addition (mass percentage) on the gelling properties of silver carp surimi were studied. The single-factor experiments showed that gel strength decreased significantly when pressure was more than 300 MPa, while there was no significant change in gel strength when time and carrageenan addition were more than 10 min and 0.8%, respectively. The optimum conditions were optimized with orthogonal experiments as follows: pressure of 300 MPa, time of 10 min and carrageenan addition of 0.8%. UHP treatment conditions had an effect on gel strength in an order of pressure, time, carrageenan addition. This study indicated that UHP treatment with carrageenan addition could well modify the effect on the formation of silver carp surimi gel.
Number of references:19
Main heading:High pressure effects
Controlled terms:Experiments - Gelation - Gels - Silver
Uncontrolled terms:Carrageenans - Gel strength - Gel strengths - Gelling properties - Mass percentage - Optimum conditions - Orthogonal experiment - pH value - Silver carp - Treatment conditions - Two stage - Ultrahigh pressure
Classification code:547.1 Precious Metals - 802.3 Chemical Operations - 804 Chemical Products Generally - 901.3 Engineering Research - 931.2 Physical Properties of Gases, Liquids and Solids
Database:Compendex
8. Accession number:20120214672695
Title:Design and characteristics analysis of coordination device for hydro pneumatic suspension
Authors:Huang, Xiaxu1 ; Yang, Jue1 ; Zhang, Wenming1 ; Shen, Yanhua1
Author affiliation:1 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Corresponding author:Yang, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:43-47 54
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A coordination device was constructed to solve the problem that the front and rear hydro pneumatic suspension of off-highway dump trucks cannot be directly connected, which was caused by the great changes of the front and rear axle load ratio in no-load and full load conditions. A simulation analysis was carried out under a half car model, in which the front and rear hydro pneumatic suspensions were connected by the coordination device. The simulation was divided into the front and rear wheels order thought the step and sine sweep excitation conditions. Sprung mass vertical acceleration, pitch angel acceleration and output force characteristics of suspensions were selected as the stand to evaluate the result. The results showed that compared with the independent suspension, the hydraulically interconnected suspensions which are connected by the coordination device had better anti-pitch performance, as well as more stable output force characteristics. Meanwhile, the extension implementation modality of the connected device was proposed.
Number of references:8
Main heading:Suspensions (components)
Controlled terms:Automobiles - Computer simulation - Equipment - Front axles - Model automobiles - Pneumatic control - Trucks
Uncontrolled terms:Axle loads - Characteristics analysis - Connect devices - Full-load - Half-car model - Hydro-pneumatic suspension - Interconnected suspensions - Off-highway dump trucks - Output force - Rear wheels - Simulation analysis - Sprung mass - Sweep excitation - Vertical accelerations
Classification code:731.1 Control Systems - 723.5 Computer Applications - 663.2 Heavy Duty Motor Vehicle Components - 901 Engineering Profession - 663.1 Heavy Duty Motor Vehicles - 662.1 Automobiles - 601.2 Machine Components - 662.4 Automobile and Smaller Vehicle Components
Database:Compendex
9. Accession number:20120214672725
Title:Column-spindle system dynamic model based on dynamic characteristics of joints
Authors:Mi, Liang1 ; Yin, Guofu1 ; Sun, Mingnan1 ; Wang, Xiaohu1
Author affiliation:1 School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China
Corresponding author:Yin, G. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:202-207
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For the needs of dynamic analysis of the horizontal machining center, the distribution of linear guide, bolt joints, ball screw and bearing which main affect the dynamic characteristics of column-spindle system were discussed, then the dynamic parameters identifying method and finite element modeling method for these joints were presented. The stiffness and damping of linear guide were identified by the combination of experimental tests and finite element analysis, and the ball screw contact stiffness was calculated based on Hertz contact theory. On this basis, the finite element model for the column-spindle system of a horizontal machining center was established. The accuracy of the finite element analysis model was verified by testing the tool point frequency response function of column-spindle system. Then influence of linear guide for the dynamic characteristics of column-spindle system was analyzed.
Number of references:11
Main heading:Finite element method
Controlled terms:Bolted joints - Dynamic analysis - Dynamics - Frequency response - Joints (structural components) - Machining centers - Screws - Stiffness
Uncontrolled terms:Ball screws - Bolt joints - Column-spindle system - Contact stiffness - Dynamic characteristics - Dynamic parameters - Experimental test - Finite element analysis model - Finite element modeling - Finite element models - Frequency response functions - Hertz contact theory - Horizontal machining - Linear guide - ON dynamics - System dynamic models
Classification code:931.1 Mechanics - 921.6 Numerical Methods - 731.1 Control Systems - 605 Small Tools and Hardware - 951 Materials Science - 603.1 Machine Tools, General - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 422.2 Strength of Building Materials : Test Methods
Database:Compendex
10. Accession number:20120214672697
Title:Road simulator test system based on improved MCS algorithm
Authors:Yin, Liyi1 ; Zheng, Shutao1 ; Shen, Gang1, 2 ; Cong, Dacheng1 ; Han, Junwei1
Author affiliation:1 School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
2 School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Corresponding author:Yin, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:55-61
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:An improved adaptive control methodology based on minimal control synthesis (MCS) for uncertain system with time varying unknown parameters and times-varying disturbances of shaking table during test was presented. The principle of traditional PID and MCS for improving the track accuracy of displacement was analyzed and compared. Minimal control synthesis integral (MCSI) was used as the outer-loop of road simulator test system servo controller. A mathematical model for actuating unit of one channel road simulator test system was built. The three controllers (PID, MCS and MCSI) were simulated. The simulation results showed that the track accuracy of displacement with MCS and MCSI was better than traditional PID, and the track accuracy of MCSI was better than traditional MCS and adaptive MCS and MCSI algorithm had a merit which could online adjust the parameters. In the end, the implementation of a rapid prototyping control system was presented. The Simulink module of road simulator test system was designed by using Matlab/Simulink, The code generated automatically in the CCS integrated development environment. The executable codes were downloaded to the Texas Instruments (TMS320C2812 and TMS320C6713).
Number of references:17
Main heading:Adaptive control systems
Controlled terms:Algorithms - Automatic test pattern generation - Codes (symbols) - Control system synthesis - Controllers - Experiments - Mathematical models - Parameter estimation - Proportional control systems - Rapid prototyping - Roads and streets - Simulators - Testing - Uncertainty analysis - Web services
Uncontrolled terms:Adaptive Control - Executable codes - Integrated development environment - MATLAB /simulink - Minimal control synthesis - Servo-controllers - Shaking tables - Simulation - Simulator test - Simulink - Test systems - Texas Instruments - Time varying - TMS320C2812 - Track accuracy - Unknown parameters
Classification code:922.1 Probability Theory - 921 Mathematics - 901.3 Engineering Research - 732.1 Control Equipment - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 714.2 Semiconductor Devices and Integrated Circuits - 671 Naval Architecture - 621 Nuclear Reactors - 423.2 Non Mechanical Properties of Building Materials: Test Methods - 406.2 Roads and Streets
Database:Compendex
11. Accession number:20120214672704
Title:Mechanism of moisture content affect on corn seed threshing
Authors:Gao, Lianxing1 ; Li, Fei1 ; Zhang, Xinwei1 ; Zhang, Yongli1 ; Liu, Xin1 ; Jiao, Weipeng1
Author affiliation:1 College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Gao, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:92-96 42
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to study the effect of moisture content on seed corn threshing mechanism, the typical three varieties of corn seed, such as Tiedan I Generation 1 etc., were selected and a series of experiments for different moisture contents of seed damage strength, handle strength and threshing-force were completed. The test results showed that the effect of moisture content on corn threshing was mainly reflected in two aspects of seed damage strength and the threshing-force. There was a significantly increasing on damage strength of corn seed kernels as the moisture content down, and then the corn seed kernels were not easily broken during threshing. These main reasons were the lager longitudinal and lateral clearance, not extrusion or support among kernels, for the significantly dropping of the threshing-force with the moisture content decline, and the handle strength dropped at the same time too. The test results also showed that there was no longitudinal and lateral clearance among kernels when the moisture content was higher than 25%, the longitudinal and lateral clearance among kernels near the biggest changed slowly when the moisture content was below 14.26%.
Number of references:13
Main heading:Moisture
Controlled terms:Agriculture - Mechanisms - Moisture determination - Seed
Uncontrolled terms:Corn seeds - Damage strength - Moisture contents - Seed damage - Threshing
Classification code:601.3 Mechanisms - 801.4 Physical Chemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 944.2 Moisture Measurements
Database:Compendex
12. Accession number:20120214672694
Title:Analysis of internal flow field in hydrodynamic coupling based on cross-correlation algorithm
Authors:Chai, Bosen1 ; Ma, Wenxing2 ; Liu, Chunbao2
Author affiliation:1 State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
2 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author:Liu, C. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:38-42
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The internal flow field of hydrodynamic coupling was tested by PIV technology. On the braking condition (i=0), flow velocimetry on radial section of turbine was extracted based on PIV cross-correlation algorithm of two continuous images, visualization and quantitative measurement of internal flow field in hydrodynamic coupling were achieved. Flow structure and velocity distribution of internal flow field in turbine on the braking condition were studied. Reasons caused the reverse flow and secondary flow were analyzed specifically. The results showed that the phenomenon above could be reduced by designing the internal structure of hydrodynamic coupling. It could reduce energy loss and raise its work performance.
Number of references:13
Main heading:Hydrodynamics
Controlled terms:Algorithms - Energy dissipation - Flow fields - Flow visualization - Stress intensity factors - Turbines - Visualization
Uncontrolled terms:Braking conditions - Cross-correlation algorithm - Energy loss - Flow field analysis - Hydrodynamic coupling - Internal flow field - Internal structure - Quantitative measurement - Reverse flow - Work performance
Classification code:902.1 Engineering Graphics - 723 Computer Software, Data Handling and Applications - 631 Fluid Flow - 921 Mathematics - 612.3 Gas Turbines and Engines - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 525.4 Energy Losses (industrial and residential)
Database:Compendex
13. Accession number:20120214672730
Title:Kinematic modeling of gear chamfering based on rotary cutting
Authors:Hu, Changjun1 ; Liu, Xiaoguang1
Author affiliation:1 Department of Physics and Mechanical and Electrical Engineering, Chizhou College, Chizhou 247000, China
Corresponding author:Hu, C. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:231-234 219
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Movement of gear chamfering by rotary cutting method was analyzed. Vector model between knife and workpiece was deduced. Locus of gear chamfering was emulated with Matlab, and gear chamfering was validated on rotary cutting machine. Specialized inspection tools was used for detecting the gear chamfer shape after machining, and the chamfer angle error was less than 0.3°, which met the project accuracy requirements.
Number of references:13
Main heading:Gear cutting
Controlled terms:Cutting tools - Kinematics - Machinery - MATLAB
Uncontrolled terms:Inspection tools - Kinematic modeling - Locus simulation - Rotary cutting machines - Vector models - Work pieces
Classification code:601 Mechanical Design - 604.1 Metal Cutting - 921 Mathematics - 931.1 Mechanics
Database:Compendex
14. Accession number:20120214672693
Title:Multi-objective stability control strategy of heavy tractor semi-trailer
Authors:Zhu, Tianjun1, 2 ; Li, Fei2 ; Zong, Changfu3 ; Cui, Guohua1
Author affiliation:1 Department of Mechanical and Electronic Engineering, Hebei University of Engineering, Handan 056038, China
2 China Automotive Technology and Research Center, Tianjin 300162, China
3 State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Corresponding author:Zhu, T. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:32-37
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For the rollover stability of heavy tractor semi-trailer, six-axle vehicle model was set up. The nonlinear tire model was used in the real model simultaneously to describe the nonlinear characters of vehicle. The commercial software TruckSim was employed to testify the model. Multi-objective stability control strategy based on tractor yaw rate, lateral acceleration and articulated angle of vehicle was suggested by using LQR optimal control technique. It was also confirmed in the integrated co-simulation of TruckSim and Matlab/Simulink. The simulation results showed that the multi-objective stability control strategy over heavy tractor semi-trailer could effectively improve the stability of vehicle and avoid the occurrence of dangerous accidents.
Number of references:11
Main heading:Stability
Controlled terms:Accidents - Control - Optimization - Tractors (agricultural) - Tractors (truck) - Vehicles
Uncontrolled terms:Heavy tractor semi-trailers - Jackknifing - Optimal controls - Rollover - Stability control
Classification code:951 Materials Science - 931 Classical Physics; Quantum Theory; Relativity - 921.5 Optimization Techniques - 914.1 Accidents and Accident Prevention - 961 Systems Science - 801 Chemistry - 731 Automatic Control Principles and Applications - 663.1 Heavy Duty Motor Vehicles - 432 Highway Transportation - 732 Control Devices
Database:Compendex
15. Accession number:20120214672713
Title:Exergy analysis of mixed-refrigerant cycle liquefaction process of biogas
Authors:Zhou, Shuxia1 ; Dong, Yuping1 ; Zhang, Yulin2 ; Wang, Weizhen1 ; Guo, Feiqiang1 ; Zhang, Tonghui1
Author affiliation:1 Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Ji'nan 250061, China
2 Shandong Green Energy Gas Industrial Co. Ltd., Heze 274000, China
Corresponding author:Dong, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:138-142 190
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The pint-sized gas mixed-refrigerant liquefaction process was designed to analyze the exergy loss by using Aspen HYSYS software. The temperature and the pressure of bubble point and the dew-point were obtained from the PR equation, and the liquefied rate and energy consumption was calculated. Subsequently, the exergy loss was calculated via the thermodynamic analysis, and the methodology for reducing exergy loss was approached. An experiment was conducted to measure the exergy loss. The results showed that small gas mixed-refrigerant liquefaction process was feasible, while the largest exergy loss in the liquefaction process was compressor. With flash evaporation pre-cooled freezing medium on the top of storage tank, the reduction of exergy loss for compressor and chiller were 12.2% and 27.2%, respectively.
Number of references:19
Main heading:Exergy
Controlled terms:Biogas - Energy utilization - Gas compressors - Liquefaction - Refrigerants - Thermoanalysis
Uncontrolled terms:Aspen HYSYS - Bubble points - Dewpoint - Exergy Analysis - Exergy loss - Flash evaporation - Freezing medium - Liquefaction process - Mixed-refrigerant - Storage tank - Thermo dynamic analysis
Classification code:803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 801 Chemistry - 641.1 Thermodynamics - 618.1 Compressors - 525.3 Energy Utilization - 522 Gas Fuels
Database:Compendex
16. Accession number:20120214672712
Title:Prediction of optimal dosage in coagulation treating anaerobically digested effluent of chicken manure
Authors:Yang, Haizhen1 ; Yan, Xiaonan1 ; Wang, Feng1 ; Luo, Zhuqiang1 ; Chen, Xin1 ; Ma, Yuxin1
Author affiliation:1 State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
Corresponding author:Yang, H. (haizhen@mail.#edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:133-137 115
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:An investigation was carried out on modeling of optimal dosage prediction for coagulation treatment of CSTR fermentation tank effluent of a biogas project. The parameters of optimal coagulant dosage model were determined using regression analysis. Influencing factors of optimal coagulant aid dosage were studied through orthogonal regression experiment, then optimal coagulant aid dosage model was built. Finally a pilot experiment was carried out to verify the reliability of the models. Results showed the model of optimal coagulant dosage in coagulation treatment of biogas slurry A was 0.00006C1.41; the model of optimal coagulant aid dosage B was 0.000148CN-0.014 2C-0.277N 26.7, influent chemical oxygen demand and stirring intensity were found to be influencing factors of the coagulant aid PAM dosage. The obtained models were proved accurate and reliable through statistic test and pilot experimental verification.
Number of references:16
Main heading:Coagulation
Controlled terms:Biogas - Chemical oxygen demand - Effluent treatment - Experiments - Forecasting - Manures - Mathematical models - Optimization - Regression analysis
Uncontrolled terms:Biogas slurry - Chicken manure - Coagulant dosage - Dosage - Experimental verification - Influencing factor - Optimal dosage - Orthogonal regression - Pilot experiment - Prediction model - Stirring intensity
Classification code:921.5 Optimization Techniques - 921 Mathematics - 901.3 Engineering Research - 922.2 Mathematical Statistics - 802.3 Chemical Operations - 452.4 Industrial Wastes Treatment and Disposal - 452.3 Industrial Wastes - 522 Gas Fuels
Database:Compendex
17. Accession number:20120214672721
Title:Structural model of distributed control system for tractor implement combination
Authors:Xie, Bin1 ; Zhu, Zhongxiang1 ; Song, Zhenghe1 ; Mao, Enrong1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Xie, B. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:182-185 196
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:With the purpose of autonomous control for tractor-implement combination, a structural model based on ISO 11783 for distributed control system was presented. The main-bus of the model organized the whole system communicating and monitoring. The sub-bus took charge of the sub-system control. The model was designed by the interconnection network, multi-layer and multi-bus control method, which was easy to be digitalized and modularized. The control tasks were schedulable according to the model using TrueTime method. Different from single processor concentrative control method, the control performance of system was determined by the network protocol and the control algorithm according to the sub-bus of the sub-system. Consistent with the results of simulation, the test revealed that the distributed control system could be effectively operated to accomplish the control tasks.
Number of references:9
Main heading:Distributed parameter control systems
Controlled terms:Algorithms - Buses - Distributed parameter networks - Model structures - Network protocols - Tractors (agricultural) - Tractors (truck)
Uncontrolled terms:Autonomous control - Control methods - Control performance - Control task - Distributed Control System - Modularized - Multi-bus interconnection - Single processors - Structural models - Sub-systems - Truetime
Classification code:408 Structural Design - 663.1 Heavy Duty Motor Vehicles - 703.1 Electric Networks - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems
Database:Compendex
18. Accession number:20120214672728
Title:Low inertia rotary electromagnet of 2-D digital valve and research on its torque-angle characteristic
Authors:Meng, Bin1 ; Ruan, Jian1 ; Li, Sheng1
Author affiliation:1 Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Edu., Zhejiang University of Technology, Hangzhou 310014, China
Corresponding author:Ruan, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:220-224 230
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Since conventional electro-mechanical converter of 2-D digital valve had limitations of large inertia and low dynamic response, a low inertia rotary electromagnet with coreless rotor structure was proposed. Based on magnetic circuit approach, the influence of key structure and operating parameters on the output torque of electromagnet was discussed firstly. Then the finite element simulation of torque-angle characteristic was performed on the platform of Ansoft/Maxwell 3-D. The experimental results were in a close agreement with the simulated results. The low inertia rotary electromagnet had large static torque and its torque-angle characteristic was close to sinusoidal waveform, which would be used as electro-mechanical converter of 2-D digital valve with high frequency response.
Number of references:12
Main heading:Valves (mechanical)
Controlled terms:Dynamic response - Electromagnets - Electromechanical devices - Frequency response - Magnetic circuits - Torque
Uncontrolled terms:2-D digital valve - Coreless rotors - Electro-mechanical - Finite element simulations - High frequency response - Low inertia - Operating parameters - Output torque - Simulated results - Sinusoidal waveforms - Static torque - Torque-angle characteristic
Classification code:408.1 Structural Design, General - 421 Strength of Building Materials; Mechanical Properties - 601.2 Machine Components - 701.2 Magnetism: Basic Concepts and Phenomena - 704.1 Electric Components - 731.1 Control Systems
Database:Compendex
19. Accession number:20120214672726
Title:Kinematic analysis of gear trains based on link units
Authors:Wang, Chengzhi1 ; Xu, Zhilong1
Author affiliation:1 School of Mechanical Engineering, Jimei University, Xiamen 361021, China
Corresponding author:Wang, C. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:208-214
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:By applying the notion of link units to the gear trains, the link units, especially the Jacobian units, the gear and planet carrier was gotten. The closed loops about gear train also were analyzed, and three kinds of basic closed loop were summed up. By using the effect factors and according to the basic closed loops, the units could be easily combined together to build Jacobian matrix, that was a linear equations, of whole gear train. After solved the linear equations, the angular velocities of each gears and planet carriers were yielded. It did not need to divide the compound planetary train into basic epicylic and fixed axis gear trains and also did not need to draw the arrows to determine the rotations of each links in the planar trains. It was easy to model the equations with manual hands or automatically model with computer for its modular property. The method could be used for any complex planar gear trains.
Number of references:8
Main heading:Jacobian matrices
Controlled terms:Kinematics - Linear equations
Uncontrolled terms:Closed loops - Gear trains - Jacobians - Kinematic analysis - Link units
Classification code:921 Mathematics - 921.1 Algebra - 931.1 Mechanics
Database:Compendex
20. Accession number:20120214672714
Title:Performance experiment of helix teeth-roller straw adjusting material device
Authors:Li, Wenzhe1 ; Dong, Xin1 ; Wang, Defu1 ; Han, Zengde2 ; Cao, Hongguo2 ; Wu, Hongxin2
Author affiliation:1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Li, W. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:143-147
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Through the self-designed test-bed of helix teeth-roller corn straw adjusting material device, the snapping corn straw were cracked and broken continuously by different rolling way of teeth-roller adjusting material device. In order to reach the optimal parameter combination, effect on processing teeth-roller's working clearance, speed of rotation and feeding speed of adjusting material device was analyzed by using the orthogonal tests method. The results showed that teeth-roller's working clearance significantly influenced processing performance. Optimal group of parameters was the working clearance of 2 mm, the feeding speed of 4 km/h, the rotate speed of the teeth-roller of 65 r/min.
Number of references:6
Main heading:Rollers (machine components)
Controlled terms:Experiments - Materials - Optimization
Uncontrolled terms:Adjusting material device - Corn straws - Feeding speed - Optimal parameter combinations - Orthogonal test - Performance experiment - Processing performance - Rotate speed - Speed of rotation
Classification code:601.2 Machine Components - 901.3 Engineering Research - 921.5 Optimization Techniques - 951 Materials Science
Database:Compendex
21. Accession number:20120214672708
Title:Effect of non-circle nozzle on hydraulic performance of impact variable-rate sprinkler
Authors:Chen, Chao1 ; Yuan, Shouqi1 ; Li, Hong1 ; Wang, Chao1
Author affiliation:1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Yuan, S. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:111-115
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To improve the irrigation uniformity of the variable-rate sprinkler, the relationship between the non-circle nozzle and the rainfall distribution of the variable-rate sprinkler was studied. Based on equal nozzle area, non-circle nozzles with different shapes were designed and their hydraulic characteristics were compared through experiment. The experiment indicated that for the star shaped nozzle, the range rarely decreased and the tendency of the rainfall distribution under different pressures were similar. The hydraulic character was compared between the star shaped nozzle and the circle nozzle. For the star shaped nozzle, the rainfall distribution of the long range area was 85% of the short range area, for the circle nozzle, the number was 79%, which indicated that the rainfall distribution of the star shaped nozzle was better than that of the circle nozzle. The isogram of sprinkler water depth showed that the irrigation uniformity of the star shaped nozzle was better than that of the circle nozzle and the irrigation uniformity of the square irrigation area was better than that of the triangle irrigation area.
Number of references:14
Main heading:Spray nozzles
Controlled terms:Experiments - Rain - Sprinkler systems (irrigation) - Stars
Uncontrolled terms:Hydraulic characteristic - Hydraulic characters - Hydraulic performance - Impact sprinkler - Irrigation area - Irrigation uniformity - Long range - Rainfall distribution - Uniformity - Variable rate - Water depth
Classification code:443.3 Precipitation - 631.1 Fluid Flow, General - 657.2 Extraterrestrial Physics and Stellar Phenomena - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research
Database:Compendex
22. Accession number:20120214672688
Title:Affecting factors experiment in tire lateral force
Authors:Guo, Konghui1 ; Li, Ning1 ; Zhuang, Ye1
Author affiliation:1 State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China
Corresponding author:Zhuang, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:1-5
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The tire lateral force was influenced by tire side slip angle, vertical force, camber angle, longitudinal slip ratio, wheel speed, tire pressure and so on, and was one important part of vehicle lateral dynamics. Based on the research of tire test data, the relation between tire lateral force and all affecting factors was described in detail. The characteristic diagram of the lateral force versus the tire slip angle showed a degressive shape. An increase of wheel load did not lead to a proportional increase of the transferable lateral force. The degressive dependence of the lateral force upon the slip angle as well as upon the wheel load was very important for the driving behavior and the tuning of suspension, as would be clarified by a numerical example. The relation between tire lateral force and camber angle was very important for suspension camber recovery property, and a numerical example was used to clarify.
Number of references:5
Main heading:Tires
Controlled terms:Arch bridges - Automobile suspensions - Cambers - Clarification - Experiments - Vehicles - Wheels
Uncontrolled terms:Affecting factors - Camber angle - Driving behavior - Lateral force - Longitudinal slip ratio - Numerical example - Recovery properties - Sideslip angles - Slip angle - Tire pressure - Tire test data - Vehicle lateral dynamics - Vertical force - Wheel loads - Wheel speed
Classification code:822.2 Food Processing Operations - 818.5 Rubber Products - 652.1 Aircraft, General - 901.3 Engineering Research - 632.1 Hydraulics - 432 Highway Transportation - 401.1 Bridges - 601.2 Machine Components
Database:Compendex
23. Accession number:20120214672701
Title:Reverse design and simulation of walking-type rice based on conjugate cam transplanter's seedling-pushing device
Authors:Chen, Jianneng1 ; Wang, Ying1 ; Zhao, Xiong1 ; Zhao, Yun1
Author affiliation:1 School of Mechanical Engineering and Automation, Zhejiang Sci.-Tech. University, Hangzhou 310018, China
Corresponding author:Chen, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:78-82 37
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The seedling-pushing device based on the conjugate cam was proposed aiming at the problems, that ending time of seedling-pushing was advanced or delayed, of the traditional walking-type rice transplanter's seedling-pushing device. According to kinematics curves of the seedling-pushing rod which were got from the walking-type rice transplanter's driving mechanism with planetary elliptic-gear trains and requirements of planting agriculture, the reverse model of the seedling-pushing device was established. A reverse design and simulation software of this seedling-pushing device was compiled based on Visual Basic 6.0. A set of optimum parameters which met the requirements of planting agriculture were received by the software. The structural design was carried on by using these parameters. Virtual prototype test was performed after finishing the 3-D design of the transplanting mechanism, whose results showed that the seedling-pushing device could meet the working requirements of walking-type rice transplanter and the ending time of seedling-pushing was accurate.
Number of references:9
Main heading:Equipment
Controlled terms:Agriculture - Cams - Computer software - Structural design
Uncontrolled terms:Design and simulation - Driving mechanism - Kinematics curves - Optimum parameters - Reverse - Rice transplanter - Seedling-pushing device - Virtual prototype - Visual Basic 6.0
Classification code:408.1 Structural Design, General - 601.3 Mechanisms - 723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 901 Engineering Profession
Database:Compendex
24. Accession number:20120214672715
Title:Inactivation kinetics model of aspergillus parasiticus in mouldy maize by microwave processing
Authors:Jin, Zhiqiang1, 2 ; Wang, Shunxi1 ; Han, Pei1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Department of Biological Science and Technology, Changzhi College, Changzhi 046011, China
Corresponding author:Wang, S. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:148-153 170
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The inactivation models of Aspergillus parasiticus in mouldy maize by microwave processing were studied in order to describe and predict the inactive effects. Aspergillus parasiticus spores were inactivated under 50-75°C by microwave processing, then the survival curves were determined. Linear, Weibull and reduced Weibull models were selected to fit the inactivation kinetics of Aspergillus parasiticus spores. Accuracy factor, Bias factor, mean square error and regression coefficients were used to compare the goodness-of-fit of the linear, Weibull and reduced Weibull models. The results suggested that Weibull model could provide better fit to the inactivation of Aspergillus parasiticus spores by microwave processing than linear model. The reduced Weibull model produced a fit as good as the original Weibull model and lead to an improvement of the robustness of the model, which would be beneficial to select optimum combinations of temperature and time to obtain the desired target levels of spores inactivation. Incomplete or excessive sterilization could be avoided when Weibull model was used to predict microwave sterilization time instead of linear model.
Number of references:18
Main heading:Aspergillus
Controlled terms:Mathematical models - Microwaves - Sterilization (cleaning)
Uncontrolled terms:Aspergillus parasiticus - Bias factor - Goodness of fit - Inactivation kinetics - Inactivation models - Microwave processing - Microwave sterilization - Optimum combination - Regression coefficient - Survival curves - Target levels - Weibull - Weibull models
Classification code:461.9 Biology - 711 Electromagnetic Waves - 822.2 Food Processing Operations - 921 Mathematics
Database:Compendex
25. Accession number:20120214672700
Title:Design and parameters optimization of deformed eccentric non-circular gears transplanting mechanism
Authors:Zhao, Yun1 ; Gao, Lindi1 ; Chen, Jianneng1 ; Zhang, Guofeng1
Author affiliation:1 School of Mechanical Engineering and Automation, Zhejiang Sci.-Tech. University, Hangzhou 310018, China
Corresponding author:Zhao, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:74-77
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A deformed eccentric non-circular gears was presented. The seedling transplanting mechanism, sending seedlings, transplanting, and the return time were redistributed by using deformation characteristics, which reduced the seedling needle relative velocity. Transplanting institutions kinematics analysis and a mathematical model were built. Simulation software, motion analysis and optimization program were developed with the application of VB programming language. The bodies of various sports-drop features and optimization results were displayed on program interface, which greatly improved the efficiency of human-computer interaction, easily got a quick group of optimal data, and improved the success rate of the machine development.
Number of references:7
Main heading:Optimization
Controlled terms:Computer simulation languages - Computer software - Design - Gears - Human computer interaction - Mathematical models
Uncontrolled terms:Deformation Characteristics - Kinematics analysis - Machine development - Motion analysis - Non-circular gears - Optimal data - Optimization programs - Parameters optimization - Program interface - Programming language - Relative velocity - Seedling transplanting - Simulation software
Classification code:921.5 Optimization Techniques - 921 Mathematics - 723.1.1 Computer Programming Languages - 723 Computer Software, Data Handling and Applications - 601.2 Machine Components - 461.4 Ergonomics and Human Factors Engineering - 408 Structural Design
Database:Compendex
26. Accession number:20120214672699
Title:Dynamic characteristics of large wheel tractor with hinge swing link during unilateral obstacle surmounting
Authors:Zhang, Guangqing1 ; Zhu, Sihong1 ; Li, Weihua2 ; Liu, Meirong2
Author affiliation:1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2 Xulun Group, Xuzhou 221000, China
Corresponding author:Zhu, S. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:67-73
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:According to the structural characteristics of frame of large wheel tractor, a spatial mechanism multi-body system model with eight degree of freedoms was set up. In order to obtain solutions of multi-bodies dynamic simulation, the augmented formulation based on Euler 4 parameters was set up and simulation programs of multi-body dynamics were developed with help of Matlab software. The elasticity of tires in longitudinal and lateral direction was described with a spring-damper element of variable parameter in series. In the program the iteration equations of the tires functions and hydraulic cylinders functions with a dynamic pressure feedback network were calculated to reveal the nonlinear relations between the force with displacement and velocity of the tractor bodies. Multi-body dynamics simulation of the model was carried out to obtain dynamical loads and vibration frequency. The adaptive ability to environment and safety of steering could be improved by using a dynamic pressure feedback network in hydraulic system of steering.
Number of references:18
Main heading:MATLAB
Controlled terms:Computer simulation - Computer software - Dynamics - Elasticity - Hydraulic equipment - Nonlinear equations - Nonlinear feedback - Tractors (agricultural) - Tractors (truck) - Wheels
Uncontrolled terms:Adaptive ability - Degree of freedom - Dynamic characteristics - Dynamic pressures - Environment and Safety - Hydraulic cylinders - Hydraulic system - Iteration equations - Lateral directions - Matlab- software - Multi-body dynamic - Multi-body system model - Nonlinear relations - Simulation program - Spatial mechanism - Spring-damper element - Structural characteristics - Unilateral obstacle surmounting - Variable parameters - Vibration frequency
Classification code:921.1 Algebra - 731.1 Control Systems - 723.5 Computer Applications - 931.1 Mechanics - 723 Computer Software, Data Handling and Applications - 632.2 Hydraulic Equipment and Machinery - 601.2 Machine Components - 663.1 Heavy Duty Motor Vehicles
Database:Compendex
27. Accession number:20120214672717
Title:FEM analysis and validation of ohmic heating process of soymilk
Authors:Xiong, Xiufang1 ; Li, Xingshu1 ; Guo, Kangquan1 ; Kiyohiko, Toyoda2
Author affiliation:1 College of Mechanical and Electronic Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
2 Graduate School of Science and Technology, Kobe University, Kobe 657-8501, Japan
Corresponding author:Guo, K. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:158-163
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In tofu making by ohmic heating, the textural uniformity of tofu is greatly influenced by the temperature distribution in soymilk. A 2-D static model was developed to visualize the change of temperature distribution in soymilk during ohmic heating process. Experimental validation of the temperature distribution obtained by mathematical modeling was performed by temperature measurement. Electrical conductivity of soymilk was correlated with temperature, uniform distribution of temperature can be obtained and heating rate is increased with the temperature. During ohmic heating process from 50 s to 300 s, the maximum temperature difference in soymilk greatly increased from 3°C to 20.2°C. Root mean square error between experimental and simulated data was 1.86%, which indicated that numerical simulation was effective in predicting temperature distribution during ohmic heating process.
Number of references:9
Main heading:Computer simulation
Controlled terms:Electric conductivity - Finite element method - Heating - Joule heating - Mean square error - Temperature distribution - Temperature measurement
Uncontrolled terms:Electrical conductivity - Experimental validations - FEM analysis - Finite element simulations - Mathematical modeling - Maximum temperature - Root mean square errors - Simulated data - Soy milk - Static model - Uniform distribution
Classification code:944.6 Temperature Measurements - 921.6 Numerical Methods - 731.1 Control Systems - 723.5 Computer Applications - 701.1 Electricity: Basic Concepts and Phenomena - 643.1 Space Heating - 641.1 Thermodynamics
Database:Compendex
28. Accession number:20120214672723
Title:Detection and location algorithm for overlapped fruits based on concave spots searching
Authors:Xie, Zhonghong1, 2 ; Ji, Changying1 ; Guo, Xiaoqing2 ; Zhu, Shuxin2
Author affiliation:1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
2 College of Information Technology, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author:Ji, C. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:191-196
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to calculate centric coordinates and radius of quasi-circular ripe fruits whose growing state was approached or overlapped, a kind of fast location and detection method for fruits object based on concave spots searching was proposed. After the object was segmented from background with hue according to statistical law, the freeman chain code algorithm was used to extract one-pixel fruit contour, from which the edge character points were abstracted. Then the edge concave spots which were found by direction coding difference of N points were divided into several concave spot groups, and the segmentation concave spots were located by the threshold. At last, the centric coordinates and radius of several overlapped peaches were calculated based on optimized circular Hough transform. The research results showed that the proposed method had rapid speed, the highest obtainable right recognition rate was 90.0%, and the error rate of centric points and radius was below 7%.
Number of references:12
Main heading:Fruits
Controlled terms:Algorithms - Codes (symbols) - Hough transforms
Uncontrolled terms:Detection methods - Direction coding difference of N points - Edge character point - Error rate - Freeman chain code - Group of concave spots - Location algorithms - Object based - Recognition rates - Research results
Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 821.4 Agricultural Products - 921 Mathematics - 921.3 Mathematical Transformations
Database:Compendex
29. Accession number:20120214672706
Title:Numerical analysis on pressure fluctuation of unsteady flow in double blade screw type centrifugal pump
Authors:Zhang, Jinfeng1 ; Xu, Yuping1 ; Yuan, Shouqi1 ; Zhou, Jianjia1 ; Zhang, Lei1
Author affiliation:1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Zhang, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:102-106 66
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to analyze the inner flow pressure fluctuation performance in screw type centrifugal pumps, a ZJ200-25 screw type centrifugal pump with double screw blades was chosen as the study subject. Based on Navier-Stokes equations and shear stress transport (SST) turbulent models, 3-D unsteady flow field of the pump was simulated numerically under several operating conditions. Seven monitor points were set at the impeller-volute coupling interface, inlet and outlet faces of the pump. The pressure fluctuation and the corresponding frequency spectrum at different monitor points were obtained from the simulation. The simulation results showed that the pressure fluctuation in the pump was periodical at different operating flow rates. The impeller blade passing frequency and impeller rotational frequency were the dominant frequency at different positions, where the dominant frequency of the impeller-volute coupling interface was nearly equal to the impeller rotational frequency, and that at the inlet and outlet face were nearly equal to the impeller blade passing frequency. The amplitudes of the pressure fluctuation at the inlet and outlet were lower than that of the impeller-volute coupling interface, and the high-frequency components at the inlet and outlet were fewer than that of the impeller-volute coupling interface. The dominant frequency at the same monitor point was constant but with different amplitude at different operating conditions, the pressure fluctuation at the coupling interface had a lower strength at the position where far away from the volute tongue.
Number of references:16
Main heading:Impellers
Controlled terms:Centrifugal pumps - Navier Stokes equations - Numerical analysis - Pumps - Screws - Shear flow - Spectroscopy - Three dimensional - Unsteady flow
Uncontrolled terms:Coupling interfaces - Dominant frequency - Frequency spectra - High frequency components - Impeller blades - Impeller-volute interaction - Inner flow - Monitor points - Operating condition - Pressure fluctuation - Rotational frequency - Screw type centrifugal pump - Shear-stress transport - Turbulent models
Classification code:921.6 Numerical Methods - 902.1 Engineering Graphics - 801 Chemistry - 631.1 Fluid Flow, General - 618.2 Pumps - 605 Small Tools and Hardware - 601.2 Machine Components
Database:Compendex
30. Accession number:20120214672719
Title:Effect of 60Co-ray irradiation on membrane lipid peroxidation of fresh walnut during storage
Authors:Ma, Yanping1 ; Ma, Huiling2 ; Liu, Xinghua3 ; Yan, Longbing3
Author affiliation:1 College of Forestry, Northwest A and F University, Yangling, Shaanxi 712100, China
2 College of Life Science, Northwest A and F University, Yangling, Shaanxi 712100, China
3 College of Food Science and Engineering, Northwest A and F University, Yangling, Shaanxi 712100, China
Corresponding author:Liu, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:171-176
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to measure the effect of 60Coγ-ray irradiation on membrane lipid peroxidation of fresh walnut, fresh 'Liaohe 4' walnuts were exposed under 60Coγ-ray with 0, 0.1, 0.5, 1.0, 5.0 kGy, and subsequently packaged in 0.03 mm polyethylene bag and stored at the temperature about (0±1)°C. The following main indices, including the activity of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and lipoxygenase(LOX), the malonaldehyde(MDA)content, fine fruit rate and sensory quality, were determined at regular intervals. The results indicated that the irradiation with 5.0 kGy accelerated the process of senescence of fresh walnut. But 0.5 kGy irradiation remarkably increased the activity of SOD and CAT, decreased the MDA content, and inhibited the activity of POD and LOX. Thus, the membrane lipid peroxidation process in fresh walnut was slowed down and both fine fruit rate and sensory quality were increased significantly. In conclusion, 0.5 kGy irradiation was identified as the best dose for the preservation of fresh walnut in the 90 d storage period.
Number of references:18
Main heading:Irradiation
Controlled terms:Aldehydes - Cold storage - Fruits - Lipids - Oxidation - Oxidative stress - Oxygen - Principal component analysis
Uncontrolled terms:Fresh walnut - Lipoxygenases - Malonaldehyde - Membrane lipid peroxidation - Sensory qualities - Storage periods - Superoxide dismutases
Classification code:821.4 Agricultural Products - 804.1 Organic Compounds - 804 Chemical Products Generally - 922.2 Mathematical Statistics - 802.2 Chemical Reactions - 694.4 Storage - 461.9 Biology - 711.1 Electromagnetic Waves in Different Media
Database:Compendex
31. Accession number:20120214672720
Title:Extraction and purification of flavone in C. cathayensis exocarp
Authors:Chen, Xiangming1 ; Xu, Tao1 ; Zha, Fuben2
Author affiliation:1 Department of Biological and Environmental Engineering, Hefei University, Hefei 230022, China
2 School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Chen, X. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:177-181
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to study the extraction and purification of flavonein C. cathayensis exocarp, organic solvent extraction was used to extrat flavone compound in C. cathayensis exocarp. Through single fraction experiments and orthogonal experiments, the optimal technological parameters were determined. The result showed the maximum extraction ration of flavone compound was 1.14% under the condition of 70% ethanol, time of 4 h, temperature of 60°C, liquid-solid ratio of 15 mL/g. Silica gel chromatography was used to purify falconoid, liquid-solid ratio of 3 mL/g, gradient eluted by 70% ethanol at the speed of 2 mL/min, the purity of flavone was improved by 34.6%, and its recovery reached to 89.46%.
Number of references:11
Main heading:Solvent extraction
Controlled terms:Ethanol - Experiments - Extraction - Liquid chromatography - Liquids - Organic solvents - Purification - Silica - Silica gel
Uncontrolled terms:C. cathayensis exocarp - Flavone - Liquid solids - Orthogonal experiment - Silica-gel chromatography - Technological parameters
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 901.3 Engineering Research - 812 Ceramics, Refractories and Glass - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 523 Liquid Fuels
Database:Compendex
32. Accession number:20120214672709
Title:Comparison of locust's phototactic response to polarized blue light and unpolarized light
Authors:Liu, Qihang1 ; Zhou, Qiang1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Zhou, Q. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:116-120
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To provide theoretical reference for confirming light properties of locust's directive selection and screening combination the different light field in locust capturing machine by photoelectric equipment, the discrepant comparison that locust's directional response to polarized blue light with different illumination and unpolarized light with different spectrum was investigated through the comparative test by means of LED unpolarized light, polarized blue light and phototaxis behavior trial equipment, and the principle of the locust's directive selection influenced by polarized blue light and unpolarized light was discussed. Under the same illumination of light source, photoelectric simulation generated by polarized blue light and unpolarized light could inspire locust's bio-photoelectric effect, while the sensitive degree of locust on spectrum and polarized blue light's illumination determined the difference of locust's directional response to polarized blue light and spectral light. When the illumination of polarized blue light did change, locust's directional response to linear polarized light was the best. Comparing the different illumination of polarized blue light with locust's sensitive spectrum, locust's phototactic response to violet light was the best. Relative to linear polarized light, the alternating illumination of polarized blue light did not enhance locust's phototactic response. Considering about light properties of the effect on locusts induced, locust's sensitive spectral illumination on improving locust's phototactic inductive rate was a key factor.
Number of references:10
Main heading:Light emitting diodes
Controlled terms:Light polarization - Light sources - Photoelectricity
Uncontrolled terms:Blue light - Comparative tests - Key factors - Light fields - Light properties - Linear polarized light - Locusts - Phototactic response - Unpolarized light
Classification code:741.1 Light/Optics
Database:Compendex
33. Accession number:20120214672716
Title:Application of characteristic variables selection in determination of polyphenols content in green tea infusion by near infrared spectroscopy
Authors:Wu, Ruimei1, 2 ; Yue, Pengxiang3 ; Zhao, Jiewen1 ; Huang, Xingyi1 ; Chen, Quansheng1
Author affiliation:1 School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2 College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China
3 Damin (Zhangzhou) Food Co. Ltd., Zhangzhou 363005, China
Corresponding author:Zhao, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:154-157 163
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The feasibility to extract the polyphenols spectra information from near infrared spectroscopy of green tea infusion using chemometrics methods was attempted. A cylindrical quartz glass tube with an optical path of 5 mm was used. First, synergy interval PLS (siPLS) was implemented to select efficient spectral regions from SNV preprocessed spectra. Then, optimal variables were selected using genetic algorithm (GA) from these selected spectral regions by siPLS. This study showed that the selected characteristic spectral intervals were not within the range of the strong absorbance for water. When 166 variables selected by GA and eight PLS factors were included, the optimal model (siPLS-GA) was achieved with PRMSEP=0.685%, PRSD=5.26% and PRPD=3.22 in the prediction set. The results showed that the performance of siPLS-GA model could be employed to measure polyphenols content in green tea infusion by near infrared spectroscopy in practice.
Number of references:16
Main heading:Genetic algorithms
Controlled terms:Infrared devices - Near infrared spectroscopy - Optimization - Phenols - Quartz
Uncontrolled terms:Absorbances - Chemometrics - Green tea - Near Infrared - Optical path - Optimal model - Optimal variables - Polyphenols - Quartz glass - Spectra information - Spectral region - Synergy interval PLS
Classification code:482.2 Minerals - 723 Computer Software, Data Handling and Applications - 741.3 Optical Devices and Systems - 804.1 Organic Compounds - 921 Mathematics - 921.5 Optimization Techniques
Database:Compendex
34. Accession number:20120214672690
Title:Vehicle chassis decoupling control based on neural network inverse method
Authors:Zhu, Maofei1 ; Chen, Wuwei1 ; Xia, Guang1, 2
Author affiliation:1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
2 Institute of Automotive Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author:Zhu, M. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:13-17 5
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to eliminate the interference and coupling among automobile chassis electronic control subsystems, an integrated decoupling control approach based on neural network inverse method was proposed. The integration of active front steering (AFS), direct yaw moment control (DYC) and active suspension (ASS) was studied. According to Interactor algorithm, the reversibility of chassis system was analyzed and a BP neural network inverse system of the multivariable chassis system was obtained. Designing a close-loop controller and combining it with neural network inverse system, a compound controller was completed to improve dynamic performance. The simulation results showed that the proposed decoupling control approach could eliminate the interference and couple among automobile chassis electronic control subsystems, and improve the automobile handling and stability performance.
Number of references:7
Main heading:Neural networks
Controlled terms:Automobiles - Chassis - Computer simulation - Controllers - Industrial electronics - Inverse problems - Remote control - Servomechanisms
Uncontrolled terms:Active front steering - Active suspension - BP neural networks - Chassis electronics - Chassis system - Close loop - Decoupling controls - Direct yaw moment control - Dynamic performance - Inverse methods - Multi variables - Neural network inverse system - Stability performance - Vehicle chassis
Classification code:732.1 Control Equipment - 731.1 Control Systems - 723.5 Computer Applications - 723.4 Artificial Intelligence - 921 Mathematics - 716 Telecommunication; Radar, Radio and Television - 714 Electronic Components and Tubes - 662.4 Automobile and Smaller Vehicle Components - 662.1 Automobiles - 715 Electronic Equipment, General Purpose and Industrial
Database:Compendex
35. Accession number:20120214672691
Title:Current loop deviation decoupling control system of permanent magnet synchronous motor in vehicle application
Authors:Wu, Zhihong1 ; Wang, Shuangquan1 ; Zhu, Yuan2 ; Tian, Guangyu3
Author affiliation:1 School of Automotive Studies, Tongji University, Shanghai 201804, China
2 Chinese-German School for Postgraduate Studies, Tongji University, Shanghai 200092, China
3 State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Corresponding author:Wu, Z. (zhihong.wu@#edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:18-24
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on rotor field oriented vector control system for permanent magnet synchronous motors (PMSM), rotor harmonic flux and motor parameters and the way they affect current controller performance were analyzed. The coupled voltages deteriorated current controller performance in high speed. This was because the field current component and torque current component could not be decoupled completely in rotor field oriented vector control. According to series decoupling theory, a deviation decoupling method was proposed. The feedback decoupling control and the proposed deviation decoupling control were contrastive analyzed. Simulation and experimental results showed that the deviation decoupling algorithm was robust against parameter changes, and could suppress harmonic disturbances. It had a good decoupling ability in high speed.
Number of references:10
Main heading:Permanent magnets
Controlled terms:Control systems - Controllers - Electric current control - Robust control - Synchronous motors
Uncontrolled terms:Current controller - Current loop - Decoupling algorithms - Decoupling controls - Decoupling methods - Field currents - Harmonic disturbances - Harmonic fluxes - High-speed performance - In-vehicle applications - Motor parameters - Parameter changes - Permanent magnet synchronous motor - Rotor field - Torque current - Vector control - Vector control systems - Vector controls
Classification code:704.1 Electric Components - 705.3.1 AC Motors - 731 Automatic Control Principles and Applications - 732.1 Control Equipment
Database:Compendex
36. Accession number:20120214672710
Title:Prediction of total power in agriculture machinery based on BP neural network
Authors:Wang, Jiquan1, 2 ; Wang, Fulin1 ; Qiu, Lichun2
Author affiliation:1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
2 College of Engineering, Shenyang Agricultural University, Shenyang 110161, China
Corresponding author:Qiu, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:121-126
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Based on analysis of the deficiencies of the BP neural network used in prediction, the time series prediction based on BP neural network was discussed. According to the characteristics of BP network structure and Z transform theory, function y=x was put forward to be the transfer function in this kind of prediction. Besides, the conclusion that function y=x and y=a bx were equivalent in the BP network was proposed. It was pointed out that the layer of network structure should be two. On basis of this, the corresponding formula was derived. With the unipolar S-function and function y=x as the transfer function respectively, the total power of agriculture machinery was calculated. The results showed that the performance of function y=x in BP neural network was better than S-transfer function in external push effect and influences of training sample data processing interval. It also overcame the shortcomings of S-function used in BP neural network.
Number of references:11
Main heading:Neural networks
Controlled terms:Agriculture - Backpropagation - Data handling - Forecasting - Machinery - Network layers - Time series - Time series analysis - Transfer functions - Z transforms
Uncontrolled terms:Agriculture machinery - BP networks - BP neural networks - Network structures - Push effect - S-function - Time series prediction - Total power - Training sample - Z-transform theory
Classification code:601 Mechanical Design - 723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 921.3 Mathematical Transformations - 922.2 Mathematical Statistics
Database:Compendex
37. Accession number:20120214672689
Title:State and parameters estimation of vehicle based on UKF
Authors:Xie, Shaobo1 ; Lin, Cheng1
Author affiliation:1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Corresponding author:Xie, S. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:6-12
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Accurate estimation of vehicle state variables and uncertain parameters can improve the robustness of vehicle dynamic control system. The concept of uncertain vehicle parameter-set was proposed. The state space model for the estimation system was established. The estimation of the state variables and uncertain parameter-set were completed based on the UKF theory. The comparison with the reference model showed that the estimation method was effective and could get the precise results. A transformed magic formula tire model was also proposed to calculate the cornering force in the estimation process. The tire model reduced the parameters and could realize the precise estimation of tire lateral force.
Number of references:14
Main heading:Parameter estimation
Controlled terms:Chaotic systems - Estimation - State estimation - State space methods - Time varying control systems - Tires - Uncertainty analysis - Vehicles
Uncontrolled terms:Accurate estimation - Cornering force - Estimation methods - Estimation process - Estimation systems - Lateral force - Magic formulas - Parameters estimation - Reference models - State space model - State variables - Time varying parameter - Tire model - Tire models - UKF - Uncertain parameters - Vehicle dynamic control - Vehicle system dynamics
Classification code:432 Highway Transportation - 731.1 Control Systems - 818.5 Rubber Products - 921 Mathematics - 922.1 Probability Theory
Database:Compendex
38. Accession number:20120214672711
Title:Grey relation analysis of lignocellulose content and compression stress relaxation of corn stalk
Authors:Liao, Na1 ; Chen, Longjian1 ; Huang, Guangqun1 ; He, Cheng1 ; Han, Lujia1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Han, L. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:127-132
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Stress relaxation is one of important rheological characteristics of corn stalk compression bale, affecting compression deformation, productivity and power consumption. Cellulose, hemicellulose and lignin content of 13 different varieties of corn stalks in matured from Beijing, Liaoning, Shandong, Hubei, Shaanxi and Chongqing were measured. Compression and stress relaxation of corn stalks were implemented in the self-made cylinders by universal testing machine INSTRON3367. The stress relaxation times and balance elastic modulus were gotten by fitting stress relaxation curves of corn stalks, and were treated as assessment indicators of stress relaxation properties. Gray correlation analysis was applied in the relevance between the stress relaxation properties of corn stalks and the lignocellulose ingredients. The results showed that differences among cellulose, hemicellulose and lignin contents of different varieties of corn stalks were highly significant (P<0.05). It was found that hemicellulose and lignin contents were highly correlated with stress relaxation properties of corn stalks, while the cellulose content of corn stalks was little effect on stress relaxation properties. From a microscopic point of view, correlation degrees of cellulose, hemicellulose and lignin content associated with stress relaxation properties depended on their regions and functions in the cell wall.
Number of references:24
Main heading:Stress relaxation
Controlled terms:Cellulose - Compaction - Curve fitting - Lignin
Uncontrolled terms:Assessment indicator - Cell walls - Cellulose content - Chongqing - Compression deformation - Compression stress-relaxation - Corn stalk - Correlation degree - Gray correlation analysis - Grey relation analysis - Highly-correlated - Lignin contents - Microscopic points - Relaxation property - Rheological characteristics - Shandong - Stress-relaxation curves - Universal testing machines
Classification code:421 Strength of Building Materials; Mechanical Properties - 536.1 Powder Metallurgy Operations - 815.1.1 Organic Polymers - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity
Database:Compendex
39. Accession number:20120214672722
Title:Acquisition system and wireless transmission by 3G for farmland image based on FPGA
Authors:Liu, Longshen1 ; Shen, Mingxia1 ; Sun, Yuwen1 ; Lu, Mingzhou1 ; Xiong, Yingjun1
Author affiliation:1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Shen, M. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:186-190
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:According to the existing problem of high power consumption, high cost and low speed of wireless transmission for field image acquisition devices, a field image acquisition and transmission system based on FPGA and 3G wireless communication technology was designed. The system consisted of field image acquisition terminal and remote servers, which communicate with each other through the 3G wireless network for image transmission. The implementation of JPEG image compression algorithm based on FPGA was researched. The drive and data communication for 3G module had been achieved. The experiments showed that the system could acquire and transmit the image wirelessly in no time, and it needed about 5.42 s to transfer an image, frames were never dropped.
Number of references:10
Main heading:Image acquisition
Controlled terms:Communication - Electric power transmission - Field programmable gate arrays (FPGA) - Image compression - Wireless telecommunication systems
Uncontrolled terms:3G wireless - 3G wireless communications - 3G wireless networks - Acquisition systems - Data-communication - Existing problems - High costs - High power consumption - Image-based - JPEG-image compression - Low speed - Remote servers - Transmission systems - Wireless transmissions
Classification code:706.1.1 Electric Power Transmission - 716 Telecommunication; Radar, Radio and Television - 721.3 Computer Circuits - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices
Database:Compendex
40. Accession number:20120214672692
Title:Kinematics analysis system of double-wishbone independent suspension based on UG software
Authors:Hou, Yongtao1 ; Lu, Jianhui2 ; Zhou, Kongkang2 ; Wang, Ruochen2
Author affiliation:1 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
2 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Hou, Y. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:25-31 61
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A construction method for kinematics analysis system of the double-wishbone independent suspension based on UG software was proposed. The corresponding software prototype system using this method was developed and the frame structure of the system had been given account. Using the fast parameterized design function module of the system, the structure and geometric parameters of the double-wishbone suspension mechanism's simulation models could be rapid and convenient edited. By calling the MSC ADAMS or RecurDyn solver, which is integrated in UG/Motion, the kinematics simulation and analysis function module of the system could get the simulation results. The simulation results could be inspected using the drawing function of Matlab, which is integrated in this function module. Taking the minimum variation of the front wheel alignment parameters, minimum lateral displacement of the tires as the optimal object, the optimization design function module of suspension's the structural parameters was constructed based on genetic algorithm. The correctness and the validity of the system and its function modules were verified by a design example. The frame structure of the system had good scalability and had been used in the optimum design of McPherson suspension.
Number of references:12
Main heading:Suspensions (components)
Controlled terms:Automobiles - Computer simulation - Design - Genetic algorithms - Kinematics - MATLAB - Optimization - Software prototyping - Soil structure interactions - Structural frames
Uncontrolled terms:Construction method - Drawing function - Frame structure - Front wheel alignment parameters - Function module - Geometric parameter - Kinematics analysis - Kinematics simulation - Lateral displacements - McPherson suspensions - Optimization design - Optimum designs - Parameterized design - Simulation model - Software prototypes - Structural parameter - Suspension mechanism
Classification code:931.1 Mechanics - 921.5 Optimization Techniques - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 662.1 Automobiles - 601.2 Machine Components - 483.2 Foundations - 408.2 Structural Members and Shapes - 408 Structural Design
Database:Compendex
41. Accession number:20120214672703
Title:Axial force distribution and compression rollers shape of precision seeding belt
Authors:Wang, Dian1 ; Liu, Jinhao1 ; Wang, Jianli1 ; Lü, Guanghui1, 2 ; Wei, Zhanguo3 ; Wei, Chao1
Author affiliation:1 School of Technology, Beijing Forestry University, Beijing 100083, China
2 Science and Technology Department, National Forestry Bureau, Beijing 100714, China
3 College of Logistics, Central South University of Forestry and Technology, Changsha 410004, China
Corresponding author:Liu, J. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:88-91 132
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For improving the pressing quality of seed belt made by the pressing rollers of the precision sowing apparatus, the influences affected by the change of the deflection of rollers on the pressing force were researched. And then, the change of the deflection was compensated with the method of setting crown, while the valve of the crown was solved by the theoretical calculation. After that, the optimum pressing force was measured in the test, and the range of which is from 45 N to 160 N. So, the force inflicted on the two sides of the roller was calculated as 3405 N. Then, with the difference and iterative calculation, the valve of the crown was set to 0.35 mm. In the final, the force valves of the certain points along the rollers were tested in the experiment. The results showed that the valves and the distribution of the forces between the two rollers were basically same as theoretical analysis, and the effect of seed belt was good enough to pave in the woodland.
Number of references:10
Main heading:Rollers (machine components)
Controlled terms:Seed
Uncontrolled terms:Axial force distribution - Iterative calculation - Theoretical calculations
Classification code:601.2 Machine Components - 821.4 Agricultural Products
Database:Compendex
42. Accession number:20120214672702
Title:Simulation analysis of working process and performance of cell wheel metering device
Authors:Yu, Jianqun1 ; Wang, Gang1 ; Xin, Nan1 ; Fu, Hong2
Author affiliation:1 School of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
2 College of Computer Science and Technology, Jilin University, Changchun 130012, China
Corresponding author:Fu, H. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:83-87 101
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A cell wheel metering device and the soybean seed were researched by using the discrete element method. The 3-D discrete element method analytical model of the seed metering device was built on its 3-D CAD model extracted through the method which was based on graphic elements and the surface mesh, and the 3-D particle model of soybean seeds were established on the spherical particle. The metering performance, the trajectories and dropping angles of the soybean seeds were simulated and analyzed by using self-developed 3-D CAE software. It showed that the metering performance, the dropping angles and trajectories of the seeds were good agree with the experiment results by comparing the analytical results of simulation. This result showed the feasibility of using the discrete element method to analyze the performance of the cell wheel metering device.
Number of references:14
Main heading:Three dimensional
Controlled terms:Cells - Computer aided design - Finite difference method - Mathematical models - Seed - Wheels
Uncontrolled terms:Analytical model - Analytical results - CAD models - CAE software - Graphic elements - Metering devices - Optimal design - Particle model - Seed metering devices - Simulation analysis - Soybean seeds - Spherical particle - Surface mesh - Working process
Classification code:461.2 Biological Materials and Tissue Engineering - 601.2 Machine Components - 723.5 Computer Applications - 821.4 Agricultural Products - 921 Mathematics - 921.6 Numerical Methods
Database:Compendex
43. Accession number:20120214672696
Title:Semi-physical simulation platform for driving performance evaluation of vehicle robot driver
Authors:Chen, Gang1 ; Zhang, Weigong2
Author affiliation:1 School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2 School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Corresponding author:Chen, G. ([email protected])
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:42
Issue:12
Issue date:December 2011
Publication year:2011
Pages:48-54
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to overcome the danger existed in the debugging of vehicle robot driver in actual vehicle and quickly obtain the performance of test vehicle, a semi-physical simulation platform for driving performance evaluation of robot driver was designed. The performance evaluation of robot driver could also be conducted by the simulation platform. In the platform, the actual vehicle was replaced by the vehicle longitudinal dynamics model, and it could simulate the working conditions of actual vehicles. The displacement of throttle pedal, brake pedal, clutch pedal, and shift manipulator for vehicle robot driver measured by the sensor was used as input of the platform, and vehicle speed and engine speed calculated by the model were used as output of the platform. Vehicle robot driver could operate the platform without any changes. Simulation and real vehicle test results showed the proposed platform was effective.
Number of references:11
Main heading:Vehicles
Controlled terms:Automobile drivers - Industrial robots - Manipulators
Uncontrolled terms:Brake pedals - Clutch pedals - Driving performance - Engine speed - Longitudinal dynamics - Performance evaluation - Real vehicles - Robot driver - Semi-physical simulations - Simulation platform - Test vehicle - Vehicle robot driver - Vehicle speed - Working conditions
Classification code:432 Highway Transportation - 731.5 Robotics - 912.1 Industrial Engineering
Database:Compendex
? 2011 Elsevier Inc. All rights reserved.
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