基于 Simulink的液压闭环位置控制系统建模与仿真

摘要

以某试验平台液压闭环位置控制系统为研究对象，建立其数学模型和Simulink仿真模型，分析系统的频域特性，并进行PID校正改善了系统性能；分析不同参数下系统动态性能的变化规律，从而为系统的优化设计提供理论依据，并对校正后系统的外负载干扰进行了误差分析。%The numerical model and Simulink model were established by taking the hydraulic closed-loop position control system for a test platform as a studying object. The system trait in frequency domain was analyzed,and rectified by the proportion integration and differential (PID)controller to improve the system performance. The variety law of system dynamic performance under different pa-rameters was analyzed. Thereby a theoretical basis for the optimal design of the system is provided,and error analysis is made for the rectified system with external load disturbance.