四自由度汽车磁流变半主动悬架最优控制研究  

Optimal Control Research on Vehicle Magnetorheological Semi-Active Suspension of Four Degrees of Freedom

作　　者：贾永枢[1] 缪阿海 Jia Yongshu;Miu Ahai(Zhejiang Industry&Trade Vocational College,Wenzhou 325003,China)

机构地区：[1]浙江工贸职业技术学院,浙江温州325003

出　　处：《系统仿真学报》2020年第9期1818-1824,共7页Journal of System Simulation

基　　金：浙江省科技厅研究项目(2015C31064)。

摘　　要：应用汽车行驶动力学理论,以1/2汽车悬架模型为研究对象,建立四自由度汽车磁流变半主动悬架动力学方程和空间状态方程,设计了半主动悬架线性二次型最优控制器及控制算法,提出了汽车振动速度分段式磁流变半主动悬架最优控制策略。在SIMULINK软件中建立悬架仿真模型,仿真分析磁流变半主动悬架最优控制效果,仿真结果表明,汽车磁流变半主动悬架应用最优控制算法和分段控制策略可以降低车身垂向振动加速度和车身俯仰角加速度,提高了悬架平顺性。Based on system dynamics theory of vehicle, aiming at the model of 1/2 vehicle suspension, the vehicle magnetorheological semi-active suspension dynamic equation and space state equation with four degrees of freedom are established. A linear two times optimal controller and control algorithm for semi-active suspension are designed, and the control strategy based on magnetorheological damper of subdivision vibration velocity is proposed. Suspension simulation model is established to analyze the optimal control effect in SIMULINK. The results show that the magnetorheological semi-active suspension system based on the optimal control of the vehicle can reduce vehicle vertical vibration acceleration and vehicle pitch angle acceleration, and thus effectively improves the suspension performance.

关 键 词：半主动悬架 磁流变减振器 最优控制 四自由度 

分 类 号：U463.33[机械工程—车辆工程]