Monitor automatic gauge control strategy with a Smith predictor for steel strip rolling

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-12-01 DOI:10.1016/S1005-8850(08)60295-9

Dianhua Zhang , Hao Zhang , Tao Sun , Xu Li

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引用次数: 11

Abstract

The simplified transfer function diagram block for a monitor automatic gauge control (Mon-AGC) system of strip steel rolling process was investigated. The new notion of strip sample length was given. In this way, the delay time varying with the rolling speed was evaded. After a Smith predictor was used to monitor the AGC system, the control laws were deduced for both proportional and integral regulators. The control strategies showed that by choosing the controller parameter P=∞ for both control algorithms each regulator could compensate the whole strip gage error in the first control step. The result shows that the integral algorithm is more controllable for the system regulating process and has a better steady-state precision than the proportional regulator. Compared with the traditional control strategy, the new control laws have a faster response speed and a higher steady-state precision.

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用Smith预测器监测带钢轧制自动厚度控制策略

研究了带钢轧制过程自动厚度监控(Mon-AGC)系统的简化传递函数框图。提出了条带试样长度的新概念。这样就避免了延迟时间随滚动速度变化的问题。在采用Smith预测器对AGC系统进行监测后，推导了比例调节器和积分调节器的控制规律。控制策略表明，通过对两种控制算法选择控制器参数P=∞，每个调节器可以在第一步控制中补偿整个带规误差。结果表明，与比例调节器相比，积分算法对系统调节过程具有更好的可控性，具有更好的稳态精度。与传统控制策略相比，新控制律具有更快的响应速度和更高的稳态精度。

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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Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material

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