提出了一种新的参数摄动离散系统的鲁棒L2-L∞/H∞混合控制综合方法,并将其转化为具有较低保守性的线性矩阵不等式组的凸优化问题.考虑车辆在极限工况具有参数大范围摄动和强非线性特点,利用该方法设计主动前轮转向系统和直接横摆力矩系统集成控制策略.采用Matlab/Simulink与Carsim联合平台进行典型工况仿真分析.结果表明,设计的车辆底盘集成控制器能抑制系统参数大范围摄动和强非线性的影响,改善车辆的操纵稳定性.%A new synthesis approach of robust mixed L2-L∞/H∞ control for discrete system with parameter perturbation is proposed and converted to a less conservative convex optimization problem with linear matrix inequality constraints.Considering its features of wide-range parameter perturbation and strong nonlinearity,an integrated control strategy for active front-wheel steering and direct yaw moment systems is devised by using the method proposed,and a Matlab/Simulink & Carsim co-simulation is conducted on typical conditions.The results show that the vehicle chassis integrated controller devised can well offset the effects of wide-range parameter perturbation and strong nonlinearity and improve the handling and stability of vehicle.
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