汽车主动悬架H2/H∞多目标优化控制  

H2/H∞ Multi-objective Optimal Control of Vehicle Active Suspensions

作　　者：段建民 黄小龙 DUAN Jianmin;HUANG Xiaolong(Faculty of Information Technology,Beijing University of Technology,Beijing 100124 China)

机构地区：[1]北京工业大学信息学部

出　　处：《西华大学学报（自然科学版）》2019年第5期30-35,共6页Journal of Xihua University:Natural Science Edition

基　　金：北京市教委基金资助项目(05002011200701)

摘　　要：为协调主动悬架各项相互冲突的性能,采用基于H2/H∞混合控制进行约束优化,解决半车电液主动悬架系统多目标优化控制问题。选择路面扰动到悬架质量垂直加速度和俯仰角加速的闭环传递函数的H2范数为平顺性指标,路面扰动到悬架动行程、主动控制力和轮胎动位移的闭环传递函数的H∞范数为操纵稳定性指标,选择合理的γ1值,最终求出全状态最优控制律。仿真中假设平整路面上有一个包块,作为路面扰动脉冲输入,将该控制方案与半车被动悬架的时域仿真结果进行对比。结果表明该方案较好地解决了舒适性与操纵稳定性指标之间的矛盾。In order to coordinate the conflict among performance requirements for active suspension,this paper adopts H 2/H∞mixed control to constraint optimization,which solve the problem of multi-objective optimization control for the electro-hydraulic active suspension system of half-car.The H 2 norms of the closed-loop transfer function from road disturbance to heave and the pitch accelerations of suspension mass is selected as the index of ride comfort.The H∞norms of the closed-loop transfer function from road disturbance to suspension movement,actuator forces and tire dynamic deflection as the handling stability index.Choose the reasonabl value,and finally the optimal control law of the whole state is obtained.Simulation assumptions that a bump in flat road,as the road disturbance pulse input,the control scheme contrast with the passive suspension in the time domain,the results from the simulation demonstrate that comfort and handling stability have been improved,and the contradiction between comfort and handling stability index is solved well.

关 键 词：半车主动悬架 性能约束 多目标优化 状态反馈控制 H2/H∞混合控制 

分 类 号：TP271[自动化与计算机技术—检测技术与自动化装置]