刚柔耦合非线性主动悬架系统的FUZZY-PID控制

FUZZY-PID Control of Nonlinear Active Suspension for Rigid-Flexible Coupling Model

针对商用车前悬架主动控制问题,运用有限元和多体动力学方法,对车架进行柔性化处理,建立了某型商用车刚柔耦合整车模型;基于变论域理论设计了主动悬架模糊控制器并通过Matlab编写了控制算法,利用ADAMS与Matlab/Simulink对主动悬架系统进行联合仿真。在随机路面输入下,对多种控制策略进行了仿真分析与性能对比,结果表明该控制方法明显优于其他控制策略,能有效提高汽车的平顺性能。

To solve the control technical problem of commercial vehicle front suspension,the paper presents a new fuzzy-PID controller for active suspension. Firstly,a detailed rigid-flexible model of the vehicle was established by applying the multibody dynamics method and the finite element method. Secondly,a fuzzy- PID controller was designed for active suspension system based on the idea of variable domain,then programmed by means of Matlab. Finally,the joint simulation was carried out based on the ADAMS and the Matlab / Simulink. The joint simulation model can simulate vehicle dynamic response with the control of ASS under random road by using different control strategies,the results show that the proposed active suspension is considerably superior to the other strategies,and effectively improve the smooth performance of the vehicle.