参数模糊自整定PID在飞机全电刹车中的应用

Aircraft electric braking system based on parameter fuzzy automatic adjustive PID

提出了一种参数模糊自整定PID的控制策略在飞机全电刹车系统中的应用。滑移率的偏差和偏差变化率作为控制器的输入,PID控制器3个参数的自整定值作为控制器的输出,实现了PID参数的在线自整定。分析了参数模糊自整定PID的原理。飞机全电刹车系统的仿真曲线表明:以滑移率为控制对象,参数模糊自整定PID控制与常规PID相比,控制系统的响应速度快、超调量减小、过渡过程时间大大缩短、振荡次数少,具有较强的鲁棒性和稳定性。

The strategy of parameter fuzzy automatic adjustive PID control is put forward and is used in aircraft electric braking system. The inputs required by the controller are the slip ratio error and the error change ratio, and the automatic-adjusted values of three parameters of the PID controller are taken as outputs. Thus the on-line automatic adjustment of the PID parameters is achieved. The strategy of parameter fuzzy automatic adjnstive PID is analysed. The simulation curve of the aircraft electric braking system showed that： when taking slip ratio as object for control, compared with conventional PID, parameter fuzzy automatic adjustive PID has faster response speed, reduced overshoot, shorten transitional time, decreased fluction time, and the system has strong robustness and stability.