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丘陵山區(qū)農(nóng)用仿形行走動(dòng)態(tài)調(diào)平底盤設(shè)計(jì)與試驗(yàn)
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Terrain Adaptive and Dynamic Leveling Agricultural Chassis for Hilly Area
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    摘要:

    針對(duì)丘陵山區(qū)農(nóng)業(yè)機(jī)械通過(guò)性差、車身難以保持水平,、機(jī)械化薄弱的問(wèn)題,,設(shè)計(jì)了一種丘陵山區(qū)農(nóng)用仿形行走動(dòng)態(tài)調(diào)平底盤,。底盤4組調(diào)平懸架的懸臂夾角可精確調(diào)節(jié),,不僅能在崎嶇地面上實(shí)現(xiàn)全時(shí)多輪驅(qū)動(dòng),、多自由度仿形行走,,而且通過(guò)懸架懸臂夾角調(diào)節(jié)實(shí)現(xiàn)車體調(diào)平控制,,同時(shí)解決丘陵山區(qū)農(nóng)用動(dòng)力底盤行走、作業(yè)的兩大難題,。底盤在仿形行走過(guò)程中,,傾角傳感器實(shí)時(shí)測(cè)量車身傾斜角度,并計(jì)算出各懸架懸臂夾角瞬時(shí)調(diào)節(jié)量,,精確調(diào)整各懸架懸臂夾角實(shí)現(xiàn)底盤動(dòng)態(tài)補(bǔ)償調(diào)平,。參照中小型東方紅500型農(nóng)用拖拉機(jī)設(shè)計(jì)底盤樣機(jī),建立虛擬樣機(jī)三維模型,,并導(dǎo)入動(dòng)力學(xué)分析軟件ADAMS中進(jìn)行仿真分析,底盤在多自由度仿形行走過(guò)程中,,可在0.5°精度范圍內(nèi)實(shí)現(xiàn)動(dòng)態(tài)調(diào)平,。研制小比例樣車,,通過(guò)土槽試驗(yàn)驗(yàn)證底盤在多自由度仿形行走過(guò)程中,可在1°精度范圍內(nèi)實(shí)現(xiàn)動(dòng)態(tài)調(diào)平,。仿真,、土槽與自然地面試驗(yàn)驗(yàn)證了理論分析和計(jì)算結(jié)果,為丘陵山區(qū)農(nóng)用仿形行走動(dòng)態(tài)調(diào)平底盤應(yīng)用提供參考,。

    Abstract:

    According to poor mechanical performance such as passing and leveling difficult in hilly areas, the terrain adaptive and dynamic leveling agricultural chassis for hilly area was designed. Four groups of leveling suspension’s cantilever angle can be precisely adjusted, so the chassis can not only have the capability to adjust its own configuration to accommodate to the terrain with which it interacted and contacted, but also can locomote continuously along the ground curve of terrain surface as far as possible, moreover, it also can realize the body leveling control through the suspension’s cantilever angle adjustment. The design scheme can resolve the two problems during the chassis locomotion on the uneven ground. During the terrain adaptive locomotion, the tilt sensor can measure the inclination angle of the chassis body in real time, so the instantaneous cantilever angle adjustment value of each suspension can be calculated. And the dynamic compensation leveling of the chassis can be realized by adjusting the cantilever angle of each suspension accurately. Three-dimensional model was established by using 3D modeling software referring to Dongfanghong 500 tractor, and the model was imported into dynamic analysis software ADAMS for simulation analysis. By analyzing the simulation process, the chassis can achieve dynamic leveling control so well that the accuracy of both roll angle and pitch angle just was within 0.5°. A small scale prototype was developed and tested in the soil bin, and the chassis can perform dynamic leveling control so well that the accuracy of both roll angle and pitch angle just was within 1° during terrain adaptive locomotion with multi DOF. The simulation, experiments in the soil bin or on the natural ground can verify the theoretical analysis and calculation results, and provide reference for the application of terrain adaptive and dynamic leveling agricultural chassis in the hilly area.

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劉平義,王春燕,李海濤,張蒙蒙,魏文軍,張紹英.丘陵山區(qū)農(nóng)用仿形行走動(dòng)態(tài)調(diào)平底盤設(shè)計(jì)與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(2):74-81. LIU Pingyi, WANG Chunyan, LI Haitao, ZHANG Mengmeng, WEI Wenjun, ZHANG Shaoying. Terrain Adaptive and Dynamic Leveling Agricultural Chassis for Hilly Area[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(2):74-81.

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  • 收稿日期:2017-06-05
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  • 在線發(fā)布日期: 2018-02-10
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