%0 Journal Article
%T 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<br>A Constant Wire Tension Control System based on Improved PSO-PID in LS-WEDM
%A 上官同英
%A 刘继军
%A 陈志
%J 机械科学与技术
%D 2017
%X 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%。<br>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
%K 慢走丝线切割
%K 张紧力
%K 改进型粒子群
%K PID算法&lt
%K br&gt
%K control system
%K LS-WEDM
%K wire tension
%K improved-PSO
%K PID
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6688.shtml