基于AMESim伺服直驱泵控缸系统压力闭环控制特性分析

摘要

通过对伺服直驱泵控缸电液伺服系统工作原理的分析,推导出压力闭环控制系统的数学模型,并在AMESim中搭建出压力闭环控制回路的仿真模型.通过仿真对比分析了泵控缸压力开环闭环的特性,并对影响压力闭环PID控制特性的重要参数(液压缸的泄漏系数、电机转矩灵敏度系数、PID参数)进行仿真分析.研究结果表明通过合理的选择,控制参数可以显著提高伺服直驱泵控缸压力闭环控制系统的动态特性.%For servo direct drive pump controlled cylinder electrohydraulic servo system working principle is analyzed,The mathematical model of pressure closed loop control system is derived,and the simulation model of pressure closed loop control loop is built in AMESim. Through the simulation, the characteristics of pump controlled cylinder pressure open loop and closed loop are analyzed and compared,The simulation analysis of the important parameters (Leakage coefficient of hydraulic cylinder,sensitivity coefficient of motor torque, PID param-eter)which affect the pressure closed-loop PID control characteristics.The research results show that through the reasonable choice of control parameters can significantly improve the dynamic characteristics of servo control cylinder pressure closed-loop control system of direct drive pump.