Output feedback control and parameters influence analysis of active suspension electro-hydraulic servo actuator  

作　　者：张伟 ZHAO Dingxuan GONG Mingde ZHANG Wei;ZHAO Dingxuan;GONG Mingde(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,P.R.China;Key Laboratory of Special Carrier Equipment of Hebei Province,Yanshan University,Qinhuangdao 066004,P.R.China)

机构地区：[1]School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,P.R.China [2]Key Laboratory of Special Carrier Equipment of Hebei Province,Yanshan University,Qinhuangdao 066004,P.R.China

出　　处：《High Technology Letters》2023年第2期159-165,共7页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. U20A20332, 52175063);Hebei Province PhD Graduate Innovation Funding Project (No. CXZZBS2021121)。

摘　　要：The hydraulic servo actuator of heavy vehicle active suspension is investigated to clarify the correlation between system parameters and the control characteristics of active suspension hydraulic servo system.Accordingly, a nonlinear physical model of electro-hydraulic servo active suspension system is built.Compared with the conventional nonlinear modeling, the model in this study considers the asymmetry of working areas caused by single rod hydraulic cylinder in the suspension system.In accordance with the model, a nonlinear output feedback controller based on backstepping is designed, and the effectiveness of the controller is proved based on the experimental platform.The dynamic response curve of the electro-hydraulic servo control system under the change of parameters is generated based on the simulation model.The sensitivity of electro-hydraulic servo control performance to the change of system physical parameters is investigated, and two evaluation indexes are proposed to quantify and compare the effect of all physical parameter changes on position control system.As revealed by the results, the position control characteristics of suspension actuator are more sensitive to the changes of flow gain of the servo valve, system supply oil pressure and effective working areas of cylinder, and the two evaluation indexes are over 10 times higher than other physical parameters.

关 键 词：active suspension NONLINEAR hydraulic servo actuator output feedback 

分 类 号：U463.6[机械工程—车辆工程] TP273[交通运输工程—载运工具运用工程]