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基于主動制動的車輛穩(wěn)定性系統(tǒng)最優(yōu)控制策略
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-moment Control Based on Active Braking
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    摘要:

    引入分層控制概念設(shè)計了橫擺力矩控制和滑移率控制相結(jié)合的車輛穩(wěn)定性控制系統(tǒng),。建立了側(cè)偏角和橫擺角速度具有最佳輸出響應(yīng)的車輛理想模型,采用前饋與反饋控制相結(jié)合跟蹤理想模型的控制策略,,基于最優(yōu)控制理論設(shè)計橫擺力矩控制器,。通過設(shè)計理想滑移率分配模塊確定下層滑移率控制器理想值,,基于模糊控制理論設(shè)計滑移率控制器。在Matlab/Simulink平臺上建立8自由度非線性車輛模型,,分別在低附著和高附著路面條件下進(jìn)行了仿真分析,。結(jié)果表明:采用分層控制可以很好地實現(xiàn)車輛所需橫擺力矩,有效地控制車輛質(zhì)心側(cè)偏角和橫擺角速度跟蹤理想模型,,瞬態(tài)及穩(wěn)態(tài)響應(yīng)良好,,改善了車輛操縱穩(wěn)定性。

    Abstract:

    The cascade structure of control system consisting of yaw-moment controller and wheel slip controller was adopted to develop vehicle stability control (VSC). An ideal model with the best performance of side-slip angle and yaw-rate was established. The strategy of both the forward-feed control and back-feed control of tracking the desired model was employed. The linear quadratic regulator (LQR) theory was exploited for yaw-moment controller. Ideal slip assignment model was proposed to determine the ideal value for slip controller from the yaw moment acquired from the yaw-moment controller. The fuzzy logic control theory was applied to slip controller. An 8-DOF nonlinear vehicle model was constructed based on Matlab/Simulink platform, and then simulation was performed under low friction and high friction road condition respectively. The results show that the proposed control algorithm can achieve the desired yaw-moment, the side-slip angle and yaw-rate can track the ideal model effectively. It can achieve good transient and steady response, and improve vehicle handling stability.

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皮大偉,陳南,張丙軍.基于主動制動的車輛穩(wěn)定性系統(tǒng)最優(yōu)控制策略[J].農(nóng)業(yè)機械學(xué)報,2009,40(11):1-6.-moment Control Based on Active Braking[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(11):1-6.

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