基于改进型粒子群PID算法线切割电极丝恒张紧力控制系统

上官同英; 刘继军; 陈志

doi:10.13433/j.cnki.1003-8728.2017.0418

基于改进型粒子群PID算法线切割电极丝恒张紧力控制系统

doi: 10.13433/j.cnki.1003-8728.2017.0418

1.
中州大学工程技术学院, 郑州 450015;
2.
华中科技大学机械科学与技术学院, 武汉 430074

详细信息

作者简介:
上官同英(1968-),教授,硕士,研究方向为机电一体化与自动化控制技术,18202874498@163.com

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- 被引次数: 0
出版历程
- 收稿日期: 2015-01-06
- 刊出日期: 2017-04-05

A Constant Wire Tension Control System based on Improved PSO-PID in LS-WEDM

1.
College of Engineering ＆ Technology, Zhongzhou University, Zhenzhou 450015, China;
2.
School of Mechanical Science ＆ Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

摘要

摘要: 在慢走丝线切割走丝系统中，电极丝容易受到外界干扰和自身控制系统影响下，电极丝的张紧力会发生一定程度的波动，最大波动幅值可达50%，将导致导轮之间电极丝发生较大的挠曲变形和振动，严重影响加工工件的形位精度和表面质量。对电极丝进行受力分析，介绍改进型闭环控制电极丝走丝系统，设计恒张紧力闭环控制系统，运用改进型粒子群PID算法对电极丝进行在线恒张紧力控制。实验结果表明：本次设计的控制系统，具有高精度和实时性，电极丝张紧力波动控制在5%之内，对外界冲击载荷的修正时间约为4 s，且电极丝横向振动减少接近50%。
- 慢走丝线切割 /
- 张紧力 /
- 改进型粒子群 /
- PID算法
Abstract: In the low-speed wire electrical discharge machining (LS-WEDM), because the wire electrode is influenced by external disturbance and the control system itself, the wire tension fluctuates mildly in some ranges, and the maximum amplitude can reach 30%. This fact can lead to violent wire deflection and vibration between two guide wheels and seriously influence the geometrical accuracy and surface quality. In this paper, firstly, a detailed force analysis has been implemented, and an improved wire winding system has been introduced. Secondly, a constant wire tension control closed-loop system has been designed, and a mixed algorithm based on the improved Particle Swarm Optimization (Improved-PSO) and Proportion Integration Differentiation (PID) has been used to carry out the online control of the wire tension. Finally, a large number of experiments have been carried out by using this control system. The experimental results show that this closed-loop control system has high precision and real-time, that the wave amplitude of the wire tension can be controlled within 5%, and that the lateral vibration of wire can be reduced by approximately 50%. Therefore, this control system is practical and feasible and can be applied to the WEDM field.
- control system /
- LS-WEDM /
- wire tension /
- improved-PSO

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参考文献(15)

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