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Feedback Linearization Control of the Looper System in Hot Strip Mills  

Hwang, I-Cheol (School of Mechatronics Engineering, Dongeui University)
Kim, Seong-Bae (Department of Mechanical Engineering, Graduated School, Dongeui University)
Publication Information
Journal of Mechanical Science and Technology / v.17, no.11, 2003 , pp. 1608-1615 More about this Journal
Abstract
This paper studies on the linearization of a looper system in hot strip mills, that plays an important role in regulating a strip tension or a strip width. Nonlinear dynamic equations of the looper system are analytically linearized by a static feedback linearization algorithm with a compensator. The proposed linear model of the looper is validated by a comparison with a linear model using Taylor's series. It is shown that the linear model by static feedback well describes nonlinearities of the looper system than one using Taylor's series. Furthermore, it is shown from the design of an ILQ controller that the linear model by static feedback is very useful in designing a linear controller of the looper system.
Keywords
Hot Strip Mills; Looper; Linearization by Taylor Series; Linearization by Static Feedback; ILQ (Inverse Linear Quadratic optimal control);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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