主动悬架H_∞/广义H_2静态输出反馈控制方法  

H_∞/Generalized H_2 Static Output Feedback Control Method for Active Suspension

作　　者：刘树博[1] 赵丁选[1] 

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130025

出　　处：《中国公路学报》2009年第4期122-126,共5页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(59705005);吉林大学"九八五"工程项目(450022102002)

摘　　要：在多目标控制框架下,提出了一种主动悬架H∞/广义H2静态输出反馈控制方法。选用H∞范数作为乘坐舒适性能的指标,利用广义H2范数来描述悬架系统时域约束要求。为求解静态输出反馈增益,采用差分进化算法(DEA)和线性矩阵不等式(LMI)相结合的算法,即用DEA来得到控制器的样本,并在满足广义H2约束的条件下,用LMI方法最小化系统的H∞性能指标。以悬架行程作为反馈信号,对四自由度半车主动悬架系统进行了频域分析和时域仿真。结果表明:静态输出反馈控制方法能使悬架性能得到明显改善。Under the multi-object control framework, an Ha/generalized H2 static output feedback control method was presented for active suspension control. The H∞ norm was used as the criterion of ride comfort and the generalized H2 norm was used to describe the constraints of time domain. In order to find the gain of static output feedback, differential evolution algorithm （DEA） and linear matrix inequality （LMI） method were utilized together, namely DEA was employed to get controller samples and LMI was used to minimize the H∞ performance index under the constraint of the generalized H2 norm. Frequency-domain analysis and time domain simulation for a 4 degree of freedom （DOF） half-car active suspension system were done based on the feedback of suspension deflection. Simulated results show that static output feedback control method can obviously improve the suspension performance.

关 键 词：汽车工程 主动悬架 差分进化算法 多目标控制 静态输出反馈 H∞/广义H2 

分 类 号：U463.33[机械工程—车辆工程]