Algorithm Design and Application of Laminar Cooling Feedback Control in Hot Strip Mill

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• 作者：En-yang LIU^a ; ^{enyangliu@126.com}  ; [Author Vitae] ; Dian-hua ZHANG^a ; Jie SUN^a ; Liang-gui PENG^a ; Bai-hong GAO^b ; Li-tao SU^c
• 关键词：hot strip mill ; laminar cooling ; feedback control ; Smith predictor ; PI controller
• 刊名：Journal of Iron and Steel Research ; International
• 出版年：2012
• 期刊代码：6_1006706X
• 类别：ms
• 出版时间：April, 2012
• 卷：19
• 期：4
• 页码：39-42
• 文件大小：734 K

摘要

Feedback control is one of the most important ways to improve coiling temperature control precision during laminar cooling process. Laminar cooling equipments of a hot strip mill and structure of the control system were introduced. Feedback control algorithm based on PI controller and that based on Smith predictor were designed and tested in a hot strip mill respectively. Practical application shows that the feedback control system based on PI controller plays a limited role in improving coiling temperature control precision. The feedback control system based on Smith predictor runs stable and reliable. When the measured coiling temperature deviates from the target value, it can be adjusted to the required range quickly and steadily by Smith predictor feedback control, which improves the coiling temperature control precision greatly, and qualities of hot rolled strips are improved significantly.