电液伺服式悬架试验台的模拟仿真研究  

Simulation Research on the Electro-hydraulic Servo Suspension Test Bench

作　　者：赵强[1] 秦玉彬 孙政 王娜[1] ZHAO Qiang;QIN Yubin;SUN Zheng;WANG Na(School of Traffic and Transportation,Northeast Forestry University,Harbin 150040,China)

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》2020年第3期60-68,共9页Forest Engineering

基　　金：黑龙江省留学归国人员科学基金(LC2015019)。

摘　　要：针对国内汽车悬架研发的需求,测试悬架在各种复杂多变负载下的响应性能是非常重要的一个环节。本文重点分析电液伺服式悬架模拟试验台中电液位置伺服系统的组成及原理,建立伺服系统的模型,并基于MATLAB/Simulink软件,建立1/4非独立悬架模型及伺服系统的仿真模型,根据结构不变性原理和最优控制理论分别设计前馈干扰补偿器和系统最优反馈控制器,并将两种控制器应用于伺服系统,构成基于前馈补偿与最优反馈的复合控制,并将B级和D级路面路谱作为电液伺服系统的输入进行仿真,在给定不同负载力的情况下提高系统的响应速度和跟随精度。仿真结果与PID控制作对比表明,采用该复合控制策略能在保证系统稳定性的前提下,有效提高系统的响应速度和跟随精度,从而使试验台能够精确复现路面激励,提高试验台测试精度。According to the demand of domestic automobile suspension research and development, test the response performance of suspension under various complex and changeable loads, this paper focuses on the analysis of the composition and principle of the electro-hydraulic position servo system in the electro-hydraulic servo suspension simulation test bench, establishes the servo system model, and based on MATLAB/Simulink software, establishes the 1/4 non independent suspension model and the servo system simulation model, according to the structure based on the invariance principle and the optimal control theory, the feedforward disturbance compensator and the optimal feedback controller of the system are designed respectively, and the two controllers are applied to the servo system to form the composite control based on feedforward compensation and optimal feedback, and the B-level and D-level road spectrum are simulated as the system input. The response speed and tracking accuracy of the system are improved with different load forces. Compared with PID control, the simulation results show that the composite control strategy can effectively improve the response speed and follow-up accuracy of the system on the premise of ensuring the stability of the system, so that the test-bed can accurately reproduce the road excitation and improve the test precision of the test bench.

关 键 词：悬架模拟试验台 电液伺服系统 前馈补偿器 最优反馈控制器 

分 类 号：U463[机械工程—车辆工程]