考虑制动间隙的电子机械制动系统三阶闭环PID控制策略

Three-order closed-loop PID control strategies of electro-mechanical brake system with brake clearance

考虑制动间隙,分析电子机械制动(electro-mechanical brake,EMB)系统的控制策略,研究EMB系统从制动开始到制动结束的控制方法,建立包含制动间隙控制在内的EMB执行器比例积分微分(proportional integral differential,PID)控制策略,在Matlab/Simulink中进行仿真,改变EMB控制系统输入端的目标夹紧力,观察有无制动间隙时EMB系统夹紧力和电机转速的变化。仿真结果表明:该控制策略能提高EMB的响应速度和控制精度,尽快消除制动间隙,满足预期要求。

Considering the brake clearance,the control strategies of the electro-mechanical brake system(EMB)is analyzed to study the control method of EMB system from the beginning to the end of braking andestablish the control strategies of the proportion,integration and differentiation(PID)of the EMB actuator including the brake clearance control.They are simulated in the Matlab/Simulink to change the target clamping force of EMB brake at the end of input and observe the changes in the clamping force of EMB system and motor speed with or without the brake clearance.The simulation results show that the control strategies can improve the response speed and control accuracy of EMB,eliminate the brake clearance as soon as possible,and meet the expected requirements.