可控ISD悬架系统的建模与LQG最优控制  

Controllable ISD suspension system modeling and LQG optimal controller design

作　　者：刘昌宁[1] 陈龙[1] 张孝良[1] 杨军[1] 沈钰杰[1] LIU Changning CHEN Long ZHANG Xiaoliang YANG Jun SHEN Yujie(School of Automotive and Traffic Engineering y Jiangsu University,Zhenjiang, Jiangsu 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《中国科技论文》2017年第4期403-407,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(51405202);江苏省自然科学基金资助项目(BK20130521);江苏省科技支撑计划(工业)资助项目(BE2013096)

摘　　要：为解决惯容器、弹簧、阻尼(Inerter-spring-damper,ISD)三元件并联的被动ISD悬架性能不理想的问题,提出惯容系数可调的可控ISD悬架,采用线性二次高斯(Linear-Quadratic-Gaussian,LQG)控制策略对其进行最优控制,并在Matlab环境下进行仿真分析。结果表明:相对于传统悬架,可控ISD悬架的车身加速度均方根值降幅为9.49%,悬架动行程均方根值降幅为53.9%,车辆的乘坐舒适性和操纵稳定性得到极大改善,提高了惯容器、弹簧、阻尼三元件并联ISD悬架结构的工程应用价值。To solve the performance problem of the three-element parallel Inerter-spring-damper （ISD） passive suspension, the controllable ISD suspension with adjustable inertance coefficient was put forward, with which the optimal control was conducted by using Linear-Quadratic-Gaussian （LQG） regulator theory and then the simulation was carried out in the environment of Mat- lab/Simulink. The results show that compared with traditional passive suspension, the body acceleration mean square root of the controllable ISD suspension is decreased by 9. 49% and the suspension working space mean square root is decreased by 53. 9%. The performance of ride comfort and handle stability has been improved greatly. In addition, the value of application of the three- element parallel ISD suspension in industry has been increased.

关 键 词：惯容器 可控悬架 LQG控制 MATLAB/SIMULINK 

分 类 号：U463.33[机械工程—车辆工程]