【作者】 刘晓飞； 焦晓红； 王春艳；

【Author】 LIU Xiaofei,JIAO Xiaohong,WANG Chunyan 1.Institute of Electrical Engineering,Yanshan University,Qinhuangdao 066004,P.R.China 2.College of Sciences,Yanshan University,Qinhuangdao 066004,P.R.China

【机构】 燕山大学电气工程学院； 燕山大学理学院；

【摘要】 针对冷带轧机液压厚控(HAGC)系统中带材厚度输出存在测量延时及系统状态不完全可测的情况,本文给出了基于降维观测器的鲁棒输出反馈控制策略,以提高实际工作中冷轧机带材的板厚精度。本文首先根据LVapunov-Krasovskii泛函稳定性理论,给出了具有输出延时不确定系统存在渐近稳定降维观测器和鲁棒镇定控制器的一个充分条件,然后使用该条件设计了冷带轧机HAGC系统的鲁棒输出反馈镇定控制器,最后给出了一个实际冷轧机厚控系统的仿真研究,结果表明所设计的控制器具有很好的控制效果。更多还原

【Abstract】 In view of the case that time-delay arises in the output measurements and system states are not all measurable for the hydraulic automation gauge control(HAGC) system in cold strip rolling mills,the reduced-order observer-based robust control strategy is proposed to improve the accuracy of the strip thickness in practice.Based on Lyapunov-Krasovskii functional stability theory,a sufficient condition is first given under which there exists an asymptotically stable reduced-order observer and a robust stabilizing controller for the uncertain nonlinear system with output delay.And then,with the help of this result,a robust output feedback stabilizing controller is designed for the HAGC system in cold strip rolling mills.Moreover,simulation results in a real cold strip rolling mill are given to show the effectiveness of the proposed control scheme.更多还原