直驱式电液伺服系统PID校正复合控制器研究  

Research on PID-corrected Compound Controller of Direct Drive Electro-hydraulic Servo System

作　　者：刘勇[1] 王勇[1] 

机构地区：[1]山东大学机械工程学院,山东济南250061

出　　处：《机床与液压》2010年第17期8-11,共4页Machine Tool & Hydraulics

基　　金：国家863高技术研究发展计划资助项目(2008AA04Z130);济南市科技攻关资助项目(200705045)

摘　　要：直驱式电液伺服系统具有节能、成本低等优点,然而与传统电液伺服系统相比其性能较差。为提高直驱式电液伺服系统的性能,在建立泵控缸式电液位置伺服系统数学模型的基础上,提出将最优状态反馈控制与观测器预估负载干扰前馈控制相结合的复合控制策略,并用PID调节器对位置环节进行校正。Simulink仿真结果表明系统动静态性能得到大幅改善。研究成果对直驱式电液伺服系统的推广应用具有积极意义。Direct drive electro-hydraulic servo system has lots of advantages,such as energy-saving,low cost and so on,but compared with normal electro-hydraulic servo system its performance is poor.In order to improve the performance of direct drive electro-hydraulic servo system,on the base of establishing the mathematical model of pump controlled cylinder electro-hydraulic position servo system,a compound control strategy combining optimal state feedback control with observer-estimated load disturbance feed-forward control was presented,and the position link was corrected through a PID controller.The results of simulation in Simulink indicate that the dynamic and static performances of the system are improved substantially.The research work is of great positive significance to promote the use of direct drive electro-hydraulic servo system.

关 键 词：直驱式电液伺服系统 最优状态反馈 观测器 复合控制 PID校正 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]