基于LMI的四自由度车辆模型主动悬架H_∞控制  

H_∞ control for the active suspension system in the 4 degree-of-freedom half-vehicle model based on the LMI method

作　　者：史明光[1] 方敏[1] 陈无畏[2] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]合肥工业大学机械与汽车工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2004年第3期237-241,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(50275045);安徽省国际合作资助项目(02088001);江苏省汽车工程重点实验室开放基金资助项目(KJS01087)

摘　　要：针对带有电液主动悬架的四自由度半车模型,选取加权函数阵对系统的频域性能指标进行整定,应用基于线性矩阵不等式的H∞控制算法设计出主动悬架H∞输出反馈控制器,该方法能够有效地解决系统的鲁棒干扰抑制问题。仿真结果表明,通过选择恰当的加权函数设计电液主动悬架H∞控制器能够有效降低车身垂直加速度和俯仰角加速度,改善汽车的行驶平顺性和乘坐舒适性。WTThe weighted functions are selected to design the frequency-domain specifications,the H_∞ control algorithm based on the linear matrix inequalities(LMI) is applied to the design of the electrohydraulic active suspension in the 4 degree-of-freedom half-vehicle model,and the H_∞ linear output-feedback controller is devised. The problem of the robust disturbance is solved effectively. The simulation results show that the electrohydraulic active suspension system with the H_∞ linear output-feedback controller greatly reduces the vertical acceleration and longitudinal acceleration of the vehicle body and improves the ride and handling performance as appropriate weighted functions are selected.

关 键 词：电液主动悬架 线性矩阵不等式 H∞控制 行驶平顺性 

分 类 号：O231.1[理学—运筹学与控制论] U461.6[理学—数学]