【摘要】 针对实际车辆悬架系统使用的弹性元件和阻尼元件的非线性不确定特性,建立1/4汽车悬架系统模型,提出一种基于线性矩阵不等式的非线性H∞鲁棒控制策略,最优控制车身的垂直加速度、轮胎变形量、悬架动扰度3个系统性能参数,保证了闭环控制系统在随机干扰下的稳定性.仿真结果显示了该方法的有效性,大大地提高了驾乘汽车的舒适性和安全性.更多还原

【Abstract】 A new nonlinear robust control strategy based LMI for vehicle active suspention systems with the nonlinear uncertainties of springs and damps is presented.A quarter-car suspension model is used as the structure of vehicle suspension model.By suitably formulating the vehicle body acceleration,suspension deflection and tyre deflection as the optimization object and considering road radom disturbance,a state feedback H∞ controller is designed in terms of the feasibility of certain linear matrix inequalities.A numerical example is given to illustrate the effectiveness of the proposed approach.It is confirmed by the simulations that the designed controller not only can achieve the optimal performance for active suspensions but also preserve the closed-loop stability.更多还原