液压锻造操作机大车行走机构的位置控制系统  

Position control system for hydraulic forging manipulator cart movement mechanism

作　　者：陈柏金[1] 徐明昊[1] 张红颖[1] 

机构地区：[1]华中科技大学材料成形及模具技术国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2011年第8期6-9,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技支撑计划资助项目(2007BAF28B00)

摘　　要：建立了600 kN/1 500 kN.m锻造操作机大车行走机构的液压系统数学模型,运用模糊自整定PID控制理论设计了基于电液比例方向阀和液压马达的操作机行走位置控制系统,以减小系统的超调和振荡.通过Matlab/Simulink对控制系统进行仿真,结果表明:基于模糊控制器的系统能够消除响应超调和振荡,且较基于普通PID控制器的系统降低了25%左右的峰值速度,使操作机运行更平稳.基于S7-300 PLC编写操作机控制系统,采用存储器间接寻址的方式实现模糊控制表的在线查询,提高了控制算法的实用性.Mathematical model for hydraulic system on 600 kN/1 500 kN·m forging manipulator cart movement mechanism was presented.Using fuzzy-PID,the position control system of the manipulator movement was built to reduce the overshoot and the oscillation of the control system,based on electro-hydraulic proportional directional valve and hydraulic motors.The control system in Matlab/Simulink was stimulated.Results show that the control system has none overshoot and oscillation based on fuzzy-PID,and reduce 25% peak velocity,compared to the system based on normal PID algorithm.The programmed system by S7-300 PLC realizes inquiring the fuzzy control table online by the method of using the cursor to address the form.Thus the practicability of the algorithm was improved.

关 键 词：锻造操作机 液压系统 位置控制 模糊PID MATLAB仿真 

分 类 号：TG315.9[金属学及工艺—金属压力加工]