Subspace model identification and H/sup /spl infin// servo control of tandem cold mill

In-soo Kim, Yu Shin Chang, I. Hwang, M. Lee
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Abstract

This paper studies the development of a mathematical model and the design of H/sup /spl infin// servo controller to produce precisely mill product of tandem cold mill (TCM). To improve the performance of the automatic gauge control system based on the Taylor linearized model of TCM, a new mathematical model which can complement Taylor linearized model is constructed by using the MIMO output-error state-space model identification algorithm based on the subspace method. The H/sup /spl infin// servo controller is designed for robust stability on the variation of system parameters, restrain disturbances and tracking the setup value of the strip thickness. The H/sup /spl infin// servo problem is modified as a usual H/sup /spl infin// control problem, and this modified problem can be solve by using linear matrix inequality techniques. Consequently, the effectiveness of the proposed H/sup /spl infin// servo controller is shown in comparison with the existing PD feedforward controller.
冷连轧机的子空间模型辨识及H/sup /spl /伺服控制
本文研究了冷连轧机精密轧件的数学模型的建立和H/sup /spl / in/伺服控制器的设计。为了提高基于泰勒线性化模型的自动仪表控制系统的性能,采用基于子空间方法的MIMO输出误差状态空间模型辨识算法,构建了一种可以补充泰勒线性化模型的数学模型。H/sup /spl / inpin //伺服控制器具有对系统参数变化的鲁棒稳定性、抑制干扰和跟踪带钢厚度设定值的功能。将H/sup /spl / in//伺服问题转化为一般的H/sup /spl / in//控制问题,并利用线性矩阵不等式技术求解该问题。通过与现有PD前馈控制器的比较,验证了所提出的H/sup /spl / in//伺服控制器的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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