电控空气悬架控制器设计与仿真研究

Design and simulation analysis of LQG controller of electro-controlled air suspension

通过建立1/2车辆电控空气悬架模型和路面输入模型,应用最优控制理论进行了电控空气悬架LQG控制器的设计,并在Matlab环境中建立系统模型进行模拟仿真,将被动空气悬架、主动空气悬架的车身加速度、俯仰角加速度、悬架动行程及轮胎动位移4项指标进行了分析对比。仿真结果表明,具有LQG控制器的电控空气悬架对车辆乘坐舒适性和操纵稳定性的改善具有良好的效果。

A 1/2 car model and a road input model were established based on the optimal control theory which was used to design a LQG controller of Electro-controlled air suspension. A system simula- tion model based on Matlab environment was built and used for simulation. Four performance indexes-- body acceleration,pitch angel acceleration,suspension dynamic travel and tire dynamic deflection were compared. The simulation results demonstrated that the Electro-controlled air suspension with a LQG controller could improve the riding comfort performance enormously.