基于道路友好性的汽车主动悬架LQG最优控制方法  

LQG Control Method for Vehicle Active Suspension System Based on Road-friendly

作　　者：李金辉[1,2] 李旭宏[1] 何杰[1] 

机构地区：[1]东南大学交通学院,南京210096 [2]河南科技大学车辆与动力工程学院,洛阳471003

出　　处：《武汉理工大学学报（交通科学与工程版）》2013年第5期989-993,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目(批准号:51078087);教育部博士点基金博导类课题(批准号:20120092110044)资助

摘　　要：为分析悬架控制对汽车道路友好性的影响,基于简化的二自由度1/4车辆模型,设计了主动悬架LQG最优控制器,并在MATALB/Simulink环境下建立了主动悬架道路友好性仿真模型.基于改善汽车道路友好性的需要,采用层次分析法确定各性能指标权重,并利用Simulink/SRO模块对悬架控制参数进行优化.仿真结果表明,相对于被动悬架,主动悬架能有效降低汽车轮胎动载荷,从而提高道路友好性,且优化后的主动悬架道路友好性能更优.In order to study the road-friendly effect law of vehicle with active control suspension,a LQG （Linear-Quadratic Gaussian） optimal controller for active suspension system of the 2-dof 1/4 vehicle was designed,and the simulation model of active suspension was constructed in MATALB/Simulink.For the purpose to improve vehicle road-friendly,the evaluating index weights of optimal controller were calculated by AHP （analytic hierarchy process） method,and the control parameters were optimized with Simulink/SRO （Simulink Response Optimization） module.The simulation results showed that,compared to passive suspension,the dynamic tire force of active suspension was decreased,thereby the road-friendly was improved,and the road-friendly of the active suspension system after optimization was better than the un-optimized system.

关 键 词：汽车主动悬架 道路友好性 LQG最优控制 层次分析法 SIMULINK SRO优化 

分 类 号：U461.4[机械工程—车辆工程]