集成式电液制动系统建模仿真与压力控制

为实现对集成式电液制动系统(integrated-electro-hydraulic brake,IEHB)压力的精确控制,通过MATLAB/Simulink软件建立了包含机械系统和液压系统的IEHB整体仿真模型,研究分析了IEHB系统具有多个控制对象且相互耦合的特点,设计了电动主缸、助力电机、增压阀、减压阀以及电动泵的控制策略,从而实现主缸压力和轮缸压力的协调精确控制,并对IEHB系统和压力控制方案建模.最后,在3种不同工况下对IEHB模型和压力控制策略进行仿真实验.结果表明:所建立的IEHB模型可以较好地模拟实物系统,所设计的IEHB压力控制策略与传统的比例-积分-微分(proportional-integral-derivative,PID)控制相比具有更好的跟踪响应表现和更强的鲁棒性.

Modeling, Simulation and pressure control of integrated-electro-hydraulic brake System

In order to realize the integrated-electro-hydraulic brake system (IEHB) pressure control precision, the IEHB whole simulation model which contains hydraulic system and mechanical system was established based on MATLAB/Simulink software. The IEHB system has a number of mutually coupled control objects and these were analyzed, and the control strategies of the electric master cylinder, booster power motor, pressure increasing valve, reduce pressure valve and electric pump were designed, then the master cylinder and wheel cylinder pressure coordinate precision control can be achieved. Finally, the IEHB system and the pressure control strategies were modeled and verified by simulation experiments under three different working conditions. The results show that the real IEHB system was simulated well by the IEHB model, and the IEHB pressure control strategies which were designed have better tracking response performance and stronger robustness compared with the traditional PID control.