车辆电液主动悬架PID最优控制研究  

Research on PID and Optimal Control of Vehicle Electro-hydraulic Active Suspension

作　　者：赵强[1] 范超雄[1] 孙子尧 陈杰[1] 

机构地区：[1]东北林业大学交通学院,哈尔滨150040

出　　处：《森林工程》2014年第1期68-72,共5页Forest Engineering

基　　金：中央高校基本科研业务费项目(DL09CB02);哈尔滨市科技创新人才研究专项资金项目(2008RFQXG004)

摘　　要：基于1/4车辆悬架模型,设计车辆电液主动悬架内外环控制器。基于电液作动器的非线性特性,内环采用了经典的PID控制器,利用其灵活性特点控制输出系统所需的作用力;从车辆的行驶平顺性和操纵稳定性的目标出发,外环采用最优控制(LQG),以衰减系统振动。Simulink仿真结果证明,相同路面条件下该控制策略下的主动悬架性能相比于被动悬架及PID控制主动悬架有明显改善。Based on a-quarter active suspension model, a vehicle electro-hydraulic active suspension control scheme combining PID and optimal control was presented. Based on the nonlinear characteristics of the electro-hydraulic actuator, the inner loop adopted the classic PID controller, which can control force of the output system required with its flexible features. Considering the vehicle ride performance and steering stability, the outer loop adopted the optimal control （LQG） in order to attenuate the system vibrations. Simulation results showed that compared to the passive suspension and active suspension with PID controller, the performance of the active suspension control strategy had been improved significantly under the same road conditions.

关 键 词：主动悬架 1 4车辆模型 内外环 仿真 

分 类 号：S776[农业科学—森林工程]