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Reduced-order observer-based robust control for cold rolling mill HAGC system with measurement delay

机译:具有测量延迟的冷轧机HAGC系统基于降阶观测器的鲁棒控制

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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.
机译:考虑到在输出测量中出现时间延迟,并且对于冷轧机的液压自动仪表控制(HAGC)系统而言,系统状态无法完全测量的情况,提出了一种基于观察者降阶的鲁棒控制策略,在实践中提高了带材厚度的精度。基于Lyapunov-Krasovskii泛函函数稳定性理论,首先给出了一个充分条件,在该条件下存在一个不确定的具有输出时滞的非线性系统的渐近稳定降阶观测器和鲁棒镇定控制器。然后,借助此结果,为冷轧机的HAGC系统设计了一个强大的输出反馈稳定控制器。此外,在真实的冷轧机上给出的仿真结果表明了所提出的控制方案的有效性。

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