【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.更多还原

【Abstract】 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 1/4v ehicle 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.更多还原