Integrated Quality Control for Looper System by Adaptive Technique
| Authors: | Kitamura Akira, Tottori University, Japan
Asada Hideki, Kobe Steel, Ltd., Japan
Konishi Masami, Okayama University, Japan |
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| Topic: | 6.2 Mining, Mineral & Metal Processing |
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| Session: | Technology in Mining and Metal Processing Industry |
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| Keywords: | Steel manufacture, Looper control system, Hot rolling, Induction motor, Equipment diagnosis, Adaptive algorithm, Robust control, Parameter estimation |
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Abstract
This paper describes the integrated quality control in consideration of equipment diagnosis and control of looper height in hot strip rolling. In the integrated platform, deterioration of the induction motor is recognized quantitatively and tendency management of the deterioration is carried out. Simultaneously, the looper height control in consideration of the material quality change and degree of deterioration is performed. The motor deterioration by breakage of the rotor bar is adaptively estimated from change of the rotor bar resistance. The change of material quality and the deterioration condition are regarded as change of the damping coefficient of the looper dynamic model. The adaptive type robust control is applied to the looper height control. The validity is verified by numerical simulation.
