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looper-Tension Sliding Mode control for Hot Strip Finishing Mills

Journal of Iron and Steel Research International 2012年第1期19卷 23-30页

作者： ZHONG Zhao-zhun WANG Jing-cheng ZHANG Jian-min LI Jia-bo Department of Automation Key Laboratory of System Control and Information Processing of Ministry of Education Shanghai Jiaotong University Shanghai 200240 China Baosteel Research Institute Baoshan Iron and Steel Co Ltd Shanghai 201900 China

An innovative sliding mode controller for looper and tension control in hot strip finishing mills was developed based on approximately linearized model. Firstly, a fictitious controller of the reduced order subsystem was designed according to desired dynamics, by which, the angle and tension loops were decoupled on the sliding manifold. Then, a sliding mode controller was used to validate finite time convergence of the state vector to the manifold which guaranteed the stability and performances of the overall system. This solution was considered owing to its well- known robustness and simplicity characteristics concerning disturbances and unmodelled dynamics. Simulation results showed the effectiveness of the proposed controller compared with conventional ones.

关键词： sliding mode control looper control tension control hot strip finishing mill

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Speed Optimization Technology of Process control in Pickling Line and Tandem Cold Mill 25th

Speed Optimization Technology of Process Control in Pickling...

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第25届中国控制与决策会议

作者： ZHU xiao-yan ZHANG Dian-hua PENG liang-gui WANG kui-yue SONG jun The State Key Laboratory of Rolling and Automation Northeastern University Technology Center of Angang Steel Company Limited

ISBN: (纸本)9781467355339

The speed optimization （SO） control technology used in the pickling line and tandem cold mill （PL-TCM） is introduced. Based on characteristics of the speed control at each section of the PL-TCM, its optimal speed control was ascertained according to the speed control principle and SO strategy. With the loop capacity control principle and stability strategy, the line’s speed was controlled smoothly, which is helpful for improving strip’s quality and quickening the production rhythm. The production results indicate that the output of cold strip has been increased and its shape quality has been greatly improved with the SO control technology.

关键词： Speed optimization pickling line and tandem cold mill looper control cold rolled sheet

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