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http://dx.doi.org/10.5302/J.ICROS.2013.13.9034

CFWC Scheme for Width Control using CCD Measurement System and Fuzzy PID Controller in Hot Strip Mills  

Park, Cheol Jae (School of Mechanical and Automotive Engineering, Daegu University)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.19, no.11, 2013 , pp. 991-997 More about this Journal
Abstract
In this paper, we propose a CFWC (CCD and fuzzy PID based width control) scheme to obtain the desired delivery width margin of a vertical rolling mill in hot strip process. A WMS(width measurement system) is composed of two line scan cameras, an edge detection algorithm, a glitch filter, and so on. A dynamic model of the mill is derived from a gauge meter equation in order to design the fuzzy PID controller. The controller is a self-learning structure to select the PID gains from the error and error rate of the width margin. The effectiveness of the proposed CFWC is verified from simulation results under a width disturbance of the entry in the mill. Using a field test, we show that the performance of the width control is improved by the proposed control scheme.
Keywords
hot strip mills; vertical rolling mill; CCD camera; dynamic model; fuzzy PID; width margin control; roughing mill; edge detection; edger control;
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