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http://dx.doi.org/10.3795/KSME-A.2012.36.2.237

Design of Two-DOF Optimal Controller for Strip Gage and Tension Control of Cold Tandem Mills Using Reference Shaping Filter and Disturbance Observer  

Hong, Wan-Kee (STS Process Research Group, Technical Researcher Laboratories, POSCO)
Kang, Hyun-Seok (STS Process Research Group, Technical Researcher Laboratories, POSCO)
Hwang, I-Cheol (Dept. of Mechatronics Engineering, Dongeui Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.2, 2012 , pp. 237-244 More about this Journal
Abstract
This paper studies the design of a two-DOF optimal controller for the strip gauge-tension of cold tandem mill processes, that uses a reference shaping filter and a disturbance observer. First, a mathematical model of the strip gauge and tension system is constructed using the gauge meter equation and Hooke's law, respectively. Next, a two-DOF controller considering of a feedforward controller and a feedback controller is designed. The former is based on the reference shaping filter and the disturbance observer, and the latter is based on the ILQ optimal control algorithm. Finally, it is shown through a computer simulation that the proposed optimal controller is able to improve the strip gauge accuracy and the tension variation more than the conventional MV-AGC controller.
Keywords
Reference Shaping Filter; Strip Gauge and Tension Control; Cold Tandem Mill; 2-DOF ILQ Optimal Control; Disturbance Observer;
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