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http://dx.doi.org/10.5302/J.ICROS.2008.14.2.105

Mold Level Stabilization of Continuous Steel Casting Systems Using a Variable Disturbance Observer  

Sohn, Myung-Gong (창원대학교 제어계측공학과)
Son, Cheon-Don (창원대학교 제어계측공학과)
Kim, Goo-Hwa (POSCO 기술연구소)
Lee, Duk-Man (POSCO 기술연구소)
Kwon, Sung-Ha (창원대학교 제어계측공학과)
Jeung, Eun-Tae (창원대학교 제어계측공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.14, no.2, 2008 , pp. 105-110 More about this Journal
Abstract
This paper presents a control method to maintain stable mold level for unsteady bulging in high speed casting. The stabilizing mold level is an important factor to get high quality products. But, for various reasons, there are several disturbance factors which make mold level unstable. Bulging is one of disturbance factors and considered for the current stage of study. We design a disturbance observer to attenuate the effect of bulging which is periodic mold level disturbance. Since the period of bulging varies with the casting speed, the parameters of disturbance observer are changed by the casting speed. Simulation is illustrated to demonstrate stable performance of the proposed method in comparison with a previous method in a variable operating frequency.
Keywords
mold level; casting; bulging; disturbance observer;
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  • Reference
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