汽车主动悬架系统的最优跟踪控制

Optimal Tracking Control for Vehicle Active Suspension Systems

研究汽车主动悬架系统的线性二次型最优跟踪控制问题。基于两自由度1/4汽车悬架主动控制模型,通过利用参考输入外系统的状态来构造前馈控制作用,得到了系统的最优跟踪控制律。该跟踪控制律由状态反馈项和前馈补偿项构成,前馈增益可以通过求解矩阵方程得到。仿真算例表明了采用前馈反馈控制方法进行悬架系统最优跟踪设计的有效性。

A linear quadratic optimal tracking control problem of vehicle active suspension systems was considered. A two-degree-of-freedom quarter-car model with active suspension system was considered. By using state of the reference input exosystem to construct feedforward control action, the active optimal tracking control law was obtained. The optimal tracking control law consists of a feedback term and feedforward terms which can be obtained by solving matrix differential equations. The effectiveness of the proposed control law design method was illustrated by a numerical simulation.