基于磁流变减振器的汽车悬架振动控制  

CONTROL OF AUTOMOTIVE SUSPEN-SIONS VIBRATION VIA MAGNETO RHEOLOGICAL DAMPER

作　　者：李锐[1] 余淼[2] 陈伟民[2] 廖昌荣[2] 董小闵[2] 

机构地区：[1]重庆邮电学院自动化学院,重庆400065 [2]重庆大学光电工程学院,重庆400044

出　　处：《机械工程学报》2005年第6期128-132,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50135030;60404014)重庆市院士基金(027754)资助项目。

摘　　要：分析了磁流变减振器特性,为了抑制汽车磁流变悬架的振动,提出了一种含有控制级和协调级的分级模糊控制。在控制级,把天棚、地棚混合控制策略与模糊智能控制策略相结合,设计了1/4车辆垂直振动的半主动模糊智能控制器;在协调级,设计了整车控制的协调器,根据反馈变量对整车4个独立模糊智能控制器输出参数进行调整。把某微型汽车的4只被动减振器改装成磁流变减振器,搭建了磁流变悬架全车测控系统,运用设计的分级模糊控制器,进行了平顺性随机输入实车道路试验。试验结果表明对汽车磁流变悬架的垂直振动进行分级模糊控制是可行的,能有效提高汽车的乘坐舒适性和操纵稳定性。Characteristics of magneto-rheological(MR) clamper are analysed. A hierarchical fuzzy controller, composing of control and coordination level.is proposed for vibration control of automotive MR suspensions. In the control level, based on a hybrid control strategy of sky-hook control and ground-hook control, a semi-active fuzzy logic controller is designed for each support MR suspension system. In the coordination level, a coordination controller is designed to coordinate the four independent semi-active fuzzy controllers by adjusting their output parameters according to the system feedback.To validate the real results of hierarchical fuzzy control, a MR semi-active suspensions control and test system is set up and implemented on a mini vehicle, which is equipped with four controllable MR dampers. Test results show that the vertical vibration can be effectively reduced and the ride comfort.road holding and hanlding stability of automotive vehicle can be improved by the hierachical fuzzy controller.

关 键 词：磁流变减振器 汽车 模糊控制 分级控制 道路试验 

分 类 号：U463.33[机械工程—车辆工程]