• CN:11-2187/TH
  • ISSN:0577-6686

›› 2014, Vol. 50 ›› Issue (20): 46-53.doi: 10.3901/JME.2014.20.046

• 论文 • 上一篇    下一篇

含有测量时延摄动的冷轧机厚控系统控制器设计

华长春;于彩霞   

  1. 燕山大学电气工程学院 燕山大学国家冷轧板带装备及工艺工程技术研究中心
  • 出版日期:2014-10-20 发布日期:2014-10-20

Controller Design for Cold Rolling Mill HAGC System with Measurement Delay Perturbation

HUA Changchun; YU Caixia   

  • Online:2014-10-20 Published:2014-10-20

摘要: 针对冷带轧机液压厚控(Hydraulic automatic gauge control, HAGC)系统中带材厚度输出存在测量时延摄动以及系统存在不确定性的情况,提出一种新的控制器设计策略,以提高实际工作中冷带轧机板带材的板厚精度。基于轧机液压厚控系统各环节的方程式,给出具有测量时延摄动和不确定项的数学模型,并将该测量时延转化为时变输入时延考虑,建立最终的HAGC系统模型。针对该模型设计一种新的控制器,并利用Lyapunov稳定性理论对所设计的控制器进行严格的理论证明,得出系统的指数稳定性。针对1700单机架轧机进行Matlab仿真,将所提出的控制器与传统比例积分微分(Proportional integral derivative, PID)控制器的仿真结果进行对比,说明了该控制方法能够克服时延及不确定性的影响,比传统的PID控制器具有更加良好的效果,进一步验证了控制器的有效性和优越性。

关键词: 测量时延摄动, 控制器设计, 冷带轧机, 液压厚控

Abstract: In view of the measurement delay perturbation and uncertainties in the cold rolling mill hydraulic automatic gauge control(HAGC) system, a new controller design strategy is presented to improve the accuracy of the strip thickness in practice. Based on the equation of each link of HAGC system, the mathematical model of system, which has measurement delay perturbation and uncertainties, is given. And the measurement delay is converted into input delay. Through these, the finial HAGC system model is presented. Based on this model, a new controller is proposed. The rigorous proof is given by use of the Lyapunov stability theory to obtain the exponential stability of system. The computer simulations for a 1700 single-stand rolling mill system are performed. Compared with the traditional proportional integral derivative(PID) controller, the results show that this method could overcome the effects of time delay perturbation and uncertainties in the system and have a better performance over traditional PID controller, which further confirms the effectiveness and superiority of the proposed control scheme.

Key words: cold rolling mill, controller design, hydraulic automatic gauge control(HAGC), measurement delay perturbation

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