Transactions of the Institute of Systems, Control and Information Engineers
Online ISSN : 2185-811X
Print ISSN : 1342-5668
ISSN-L : 1342-5668
Advanced A. G. C. System for Cold Tandem Mill Based on ILQ Design Theory
Toshiya OOIFumio NISHIMURATetsuo YANAGITASeiichi BANYoshiro SEKI
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1996 Volume 9 Issue 6 Pages 274-286


Automatic Gage Control (AGC) System is very important for cold tandem mill rolling of steel. We studied a new Gage and Tension Control System, based on Inverse Linear Quadratic (ILQ) Design Theory. At first, we designed the ILQ controller for the actual plant, the first stand of cold tandem mill. Next we analysed the essence of ILQ control law, and modified the original controller. Finally we installed the modified controller to the actual plant, and achieved very high accuracy of cold strip gage. The most important feature of this study is the analysis of the essence of ILQ controller based on the parametric representation of control law.

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