车用主动转向液压系统非线性建模与仿真分析  

Nonlinear Modeling and Simulation Analysis of Vehicle Active Steering Hydraulic System

作　　者：闫红冬 王保华 陈小兵 Yan Hongdong;Wang Baohua;Chen Xiaobing(School of Automotive Engineering,Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院汽车工程学院

出　　处：《湖北汽车工业学院学报》2019年第3期11-16,共6页Journal of Hubei University Of Automotive Technology

基　　金：湖北省科技支撑计划项目(2015BAA046)

摘　　要：基于非线性状态方程,建立位置反馈PID控制闭环系统Simulink模型,分别对阀控非对称缸及整个闭环系统进行仿真分析;利用AMESim软件建立相同结构及参数模型进行对比,验证了非线性状态方程模型的有效性。结果表明:位置反馈PID控制可改善主动转向液压缸活塞运动方向改变时位移、速度、流量的不对称特性,但压力差异与突变依然存在,并在换向位置出现轻微振荡现象。Based on the nonlinear state equation,the Simulink model of position feedback PID control closed-loop system was established,the valve-controlled asymmetric cylinder and whole closed-loop system were simulated and analyzed.The same structure and parameter model were established by AMESim software to verify the validity of the nonlinear state equation model.Results show that the posi?tion feedback PID control can improve the asymmetry of displacement,velocity and flow rate when the piston movement direction of the active steering hydraulic cylinder changes.However,pressure differ?ences and mutations still exist and there is a slight oscillation in the commutation position.

关 键 词：非线性状态方程 主动转向缸 位置反馈 PID控制 

分 类 号：U463.4[机械工程—车辆工程]