主动悬架的H_2/H_∞混合输出反馈控制  

Mixed H_2/H_∞ Output Feedback Control of Active Suspension

作　　者：胡爱军[1] 孔令强[1] 

机构地区：[1]河南理工大学机械与动力工程学院,河南焦作454000

出　　处：《河南科技大学学报（自然科学版）》2014年第3期27-31,6,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(U1204517);河南省教育厅自然科学研究计划基金项目(2011A460006);河南理工大学博士基金项目(B2009-16)

摘　　要：运用线性分式变换建立了包含不确定参数的半车悬架系统模型,选择合适的性能加权函数得广义被控对象。为了保证不确定参数具有鲁棒稳定性,用H∞范数作为参数不确定性的性能指标,同时,为了使悬架系统性能指标处于一个好的水平,用H2范数作为衡量扰动作用下悬架性能指标,设计了H2/H∞混合控制器。在Mtalab7.0/Simulink环境下搭建仿真模型完成对系统的仿真分析。仿真结果证明:主动悬架的乘坐舒适性明显优于被动悬架的乘坐舒适性,同时汽车的操作稳定性也有一定程度的改善。The half-car model with uncertain parameters was established by using linear fractional transformation( LFT),then the generalized controlled object was built by chooseing the appropriate performance weighting function. In order to ensure robust stability for uncertain parameters,the norm H∞was used as the performance of the parameter uncertainty,and the norm H2as the performance of the suspension with the action of the disturbance for its performance in a good level. Then mixed H2/ H∞controller was designed. In the environment of Matlab / Simulink the simulation mode was built to analyse the system. The simulation results prove that the active suspension is better than the passive suspension in the ride comfort,and the control stability has a certain degree of improvement.

关 键 词：主动悬架 不确定性 鲁棒控制 仿真 

分 类 号：U461.4[机械工程—车辆工程]