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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 6    June 2017

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Dynamic matrix predictive control for a hydraulic looper system in hot strip mills
YIN Fang-chen(尹方辰), SUN Jie(孙杰), PENG Wen(彭文), WANG Hong-yu(王鸿雨), YANG Jing(杨晶), ZHANG Dian-hua(张殿华)

State Key Laboratory of Rolling and Automation (Northeastern University), Shenyang 110819, China

Abstract:Controlling the looper height and strip tension is important in hot strip mills because these variables affect both the strip quality and strip threading. Many researchers have proposed and applied a variety of control schemes for this problem, but the increasingly strict market demand for strip quality requires further improvements. This work describes a dynamic matrix predictive control (DMC) strategy that realizes the optimal control of a hydraulic looper multivariable system. Simulation experiments for a traditional controller and the proposed DMC controller were conducted using MATLAB/Simulink software. The simulation results show that both controllers acquire good control effects with model matching. However, when the model is mismatched, the traditional controller produces an overshoot of 32.4% and a rising time of up to 2120.2 ms, which is unacceptable in a hydraulic looper system. The DMC controller restricts the overshoot to less than 0.08%, and the rising time is less than 48.6 ms in all cases.

 

Key words: hot strip mill; hydraulic looper system; mathematical model; dynamic matrix predictive control

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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