叶梁缠绕机张力控制系统建模与设计

Modelling and Design of Tension Control System for Girder Winding Machine

缠绕构件叶梁的横截面为矩形,缠绕过程中存在张力波动和切换点处张力突变现象.通过建立缠绕和放卷两大部分的数学模型,找出影响张力变化的几个关键因素,融合预测控制、系统辨识、动态补偿等控制算法,采用计算机+多轴运动控制器+张力控制器(IPC+PMAC+TC)的主从控制模式,有效避免了缠绕过程中切换点处的张力跳变问题.运行状况表明,该系统张力动态控制精度为±4%,满足企业的使用要求,取得了明显的经济效益和社会效益.

Periodic tension disturbances and large tension variations occur in a winding cycle due to the rectangle shape of the section of girder. The location of key parameters which affect tension control accuracy through the establishment of mathematical models for winding and unwinding, combined with application of the predictive control, the identification of system and an dynamic compensation method, plus the adoption of the master/slave control mode which is based on industrial control computer high performance programmable multi-axis controller （PMAC） and tension controller （TC）, can effectively solve the problem. The ±4% dynamic tension accuracy of the tension control system has been proven. The work meets the demands of the enterprise, and has yielded obvious economic and social benefits.