电动汽车复合制动防抱死系统研究

Study on Hybrid Anti-lock Braking System in Electric Vehicle

为实现电动汽车制动防抱死控制,设计了电动汽车复合制动防抱死系统。首先建立了液压与电机制动防抱死模型;然后根据路面附着系数大小设计出复合制动防抱死控制模式;最后基于模糊PID控制设计了复合制动防抱死系统。在MATLAB/Simulink环境下同时建立复合制动与液压制动防抱死仿真模型,进行对比分析,结果表明:在不同附着系数路面,复合制动均能够有效控制滑移率,缩短制动时间和距离,回收制动能量;在对接路面,复合制动的控制效果更加理想,系统反应迅速、鲁棒性好。

In order to achieve anti-lock control of electric vehicle,a hybrid anti-lock braking system in electric vehicle is presented. Firstly,the models for hydraulic and motor anti-lock braking are established; secondly the hybrid anti-lock braking control mode is designed,according to the size of tire-road adhesion coefficient; finally,the hybrid anti-lock braking system is designed,based on the fuzzy-PID control. The simulation models for hybrid and hydraulic anti-lock braking are built simultaneously in MATLAB/Simulink in order to make comparative analysis,and the result shows that： on the different adhesion coefficient road,the hybrid braking can effectively control the slip ratio,shorten the braking time and distance,and recover the braking energy; on the joint-adhesion road,the hybrid braking can achieve an ideal control effect,and the system has rapid response and good robustness.