사행 연동 제어를 위한 영향도 모델링 및 시뮬레이션

Abstract

This paper is a study about modeling and simulation for improving meandering behavior control performance in cold rolling continuous process. In continuous process, long and thin steel strips are transferred by rolls and this is causes meandering behavior that is biased toward one side when passing through rolls and equipment s. In severe cases, the edge of the strip is damaged or broken which has a great influence on productivity. In order to compensate the meandering, a control system using a steering roll is installed in the middle of the continuous process so that the strip passes through the midpoint in the width direction of the rolls. The research on the existing meandering control has been started by modeling the meandering due to the misalignment of the roll in the web process. So far, the meandering control model and the simulation have been studied on the single meandering control system in the continuous process However, in real sites, there is a meandering that exceeds the co ntrol range of the single control system. It is impossible to control the serious meandering exceeding the control range by one single control system. So normal production is difficult because o perators convert to emergency operatio n mode such as decelerat ion in order to avoid worst case like strip breakage. Therefore, a new model of an interlinked meandering control system that links the front and rear single meandering control systems to overcome the limitation of a single meandering control system is pre sented and the control performance is verified by computer simulation. In addition, in order to improve the control performance, the analysis about the influence of strip speeds, strip tensions, meandering cylinder movements among continuous meandering con trol systems is presented. And the analysis is based on real data from a cold rolling continuous process.