某型重载起重平台电液控制仿真的优化设计

Optimization Design of Electro Hydraulic Control Simulation for a Heavy Laod Lifting Platform

某型机电设备的起重平台具有重载、单缸、长行程等特点,对电液控制系统的稳定性和抗干扰能力提出了很高的要求。本文分析了影响起重平台动力学和运动学特性的机械设计因素及外部环境因素,以AMESIM软件为平台对电液控制系统构建仿真模型,设计了柱塞缸的速度曲线,采用基于速度跟踪的模糊PID控制方法实现了起重平台工作过程的自动控制,并对开环控制时的柱塞缸运动特性和负载扰动影响进行了仿真分析。结果表明:所设计的单缸起重平台满足系统功能需求,基于速度跟踪的模糊PID控制策略,能够有效改善起重平台的运动特性,且系统冲击较小,稳定性较高。

The lifting platform of a certain type of mechanical and electrical equipment has the characteristics of heavy load,single cylinder,long run. It puts forward high requirements for the stability and anti-interference ability of the electro-hydraulic control system. In this paper,the mechanical design factors and the external environmental factors affecting the dynamic and kinematic characteristics of the lifting platform are analyzed. The simulation model of the electro-hydraulic control system is built on the AMESIM software platform. The velocity curve of the piston cylinder is designed and the working process of the lifting platform is realized automatically by the fuzzy PID control method based on the speed tracking,and simulation analysis of piston cylinder movement characteristics and load disturbance in open-loop control. The results show that the designed single cylinder lifting platform meets the functional requirements of the system. The fuzzy PID control strategy based on speed tracking can effectively improve the motion characteristics of the lifting platform,and the impact of the system is small and the stability is high.