车辆电动静液压作动器的半主动悬架时滞补偿控制

摘要/Abstract

摘要： 为了改善车辆行驶的平顺性和操纵稳定性，设计了一种基于电动静液压作动器（EHA）的车辆半主动悬架结构。进行了EHA作动器的性能试验分析，建立了EHA半主动悬架的键合图模型，计算了EHA半主动悬架系统的临界时滞，分析了时滞对EHA半主动悬架幅频特性和减振性能的影响，设计了Smith预估时滞补偿控制器，进行了EHA模糊控制半主动悬架的时滞补偿仿真分析。结果表明，EHA半主动悬架具有较好的阻尼可控性；然而随着时滞的增大，悬架系统会出现“轮跳”现象；在Smith时滞预估补偿控制下，EHA半主动悬架的簧载质量加速度减小约30%，轮胎动载荷减小约20%。

关键词: 电动静液压作动器, 半主动悬架, 模糊控制, 预估时滞补偿

Abstract: To improve the ride comfort and stability of vehicles,a kind of the semi-active suspension with EHA was designed and the mechanical property tests of the electro-hydrostatic actuator were completed. The bond graph models of the time delay fuzzy control for EHA semi-active suspension were established. The critical time delay of the EHA semi-active suspension was calculated.The time delay impacts on the amplitude-frequency characteristics and vibration isolation properties were analyzed. The time delay fuzzy Smith predictive compensation controller was designed. The simulation analyses of the time delay compensation fuzzy control for the EHA semi-active suspension were done. The results show that the EHA semi-active suspension has good damping controllability. However, with the increase of time delay, the “jump vibration” phenomenon happens to the suspension system. Under the time delay compensation fuzzy control of the EHA semi-active suspension, the sprung mass acceleration drops by about 30% and the tire dynamic load drops by about 20%.

Key words: electro-hydrostatic actuator(EHA), semi-active suspension, fuzzy control, estimated time delay compensation

中图分类号:

U463.3

寇发荣, 范养强, 张传伟, 杜嘉峰, 王哲. 车辆电动静液压作动器的半主动悬架时滞补偿控制[J]. 中国机械工程.

Kou Farong, Fan Yangqiang, Zhang Chuanwei, Du Jiafeng, Wang Zhe. Time Delay Compensation Control of Semi-active Suspension with Vehicle Electro-hydrostatic Actuator[J]. China Mechanical Engineering.

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