采用变比例积分法优化立辊AWC控制技术

Optimum Design of Edger AWC System Control with Variable Proportion Integral Technique

热轧1580线粗轧立辊轧机AWC功能通过伺服液压系统的位置闭环控制实现板坯宽度的精确控制。AWC位置闭环控制可分为两个阶段:25mm中间位位置控制和高速微调位置闭环控制,而且这两个阶段均采用典型的PID控制方法,共用一套PID参数。但在实际应用中发现该参数同时满足上述两个阶段的控制要求,液压管路振荡剧烈,AWC液压伺服系统无法正常运行。针对上述问题,本文采用变比例积分控制方法,能够有效地消除管路振荡现象并且提高系统稳定性。

Edger AWC functions,which are of rough milling in1 1580 hot rolling product line,can accurately control the width of slabs with position close-loop control in hydraulic servo system.AWC position closeloop control include two steps: 25 mm middle position control and apace position control in the small rang, which are controlled in the way of typical PID control with the same PID parameters.But during the running of hydraulic servo system,the PID parameters doesn't simultaneouslysatisfy the controlling requirement of the above-mentioned steps.With the PID parameters,hydraulic pipelines can oscillate severely,and AWC hydraulic servo system can not running normally.According to above-mentioned problems,this article adopt variable proportion integral technique,which can avoid effectively the oscillation of hydraulic pipelines and improve the stability of AWC hydraulic servo system.