半主动悬架模糊PID控制器设计及仿真分析

Design and Simulation Analysis of Fuzzy PID Controller forSemi-Active Suspension

针对传统悬架控制精度低、稳定性较差等缺陷,设计了一种半主动悬架模糊PID控制器。首先,在Matlab Simulink模块中建立模糊PID控制器模型,以簧载质量的位移偏差及其变化量作为输入参数,输出参数为K P、K I、K D;然后,应用Adams软件搭建汽车14半主动悬架模型;最后,进行Simulink和Adams联合仿真,评价控制器的使用效果。分析结果显示,此模糊PID控制器可显著降低汽车车身垂向加速度和悬架动挠度,改善了汽车行驶中的平顺性。

Aiming at the shortcomings of traditional suspension control,such as low precision and poor stability,a fuzzy PID controller is designed.Firstly,the fuzzy PID controller model is established in the Matlab/Simulink module.The displacement deviation and deviation variation of the sprung mass are taken as the input parameters,and the outputs are the three parameters K P,K I,K D of the PID controller.Then,the automobile 1/4 semi-active suspension model is built by using Adams.Finally,the Simulink and Adams co-simulation is carried out to further evaluate the effect of the controller.The results show that the designed fuzzy PID controller can significantly reduce the vertical acceleration of the car body and the dynamic deflection of the suspension,and improve the ride comfort of the car.