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首页> 外文期刊>ISIJ international >Adaptive and Robust Control Method with Estimation of Rolling Characteristics for Looper Angle Control at Hot Strip Mill
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Adaptive and Robust Control Method with Estimation of Rolling Characteristics for Looper Angle Control at Hot Strip Mill

机译：热轧机活套角控制的轧制特性估计的鲁棒自适应控制方法

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摘要

In this paper, an adaptive robust control method for looper height control of hot strip finishing mill is proposed. The change in strip tension, which exerts an influence on the width and thickness of the products, is induced by the looper height variation. Accordingly, it is important to control the looper height precisely. The looper control system may suddenly become unstable due to a change in the characteristics of rolled material and an occurrence of the slip between roll and strip while rolling. In order to maintain the control system stable even under these changes, the robust control system has been developed. However, there remained problems of slow response of the robust controller. The reason is that the control gain is set at a low value to assure the stability for the various kinds of disturbances. To solve the problem, it is necessary to set at the appropriate control gain. In this paper, the estimation of a damping coefficient of the looper height control system is carried out to adapt the control gain according to the damping coefficient. The proposed adaptive controller assures both the robustness and a high control performance regardless of the change in rolling conditions and disturbances. Using this method, the looper height control can guarantee both the stability of the looper height control and the high degree of accuracy in control.
机译：提出了一种用于热轧精轧机活套高度控制的自适应鲁棒控制方法。条带张力的变化会引起弯针高度变化，从而影响产品的宽度和厚度。因此，精确控制弯针高度很重要。由于轧制材料的特性变化以及轧制过程中轧辊和带钢之间打滑的发生，活套器控制系统可能突然变得不稳定。为了即使在这些变化下也能保持控制系统稳定，已经开发了鲁棒的控制系统。但是，仍然存在鲁棒控制器响应慢的问题。原因是将控制增益设置为较低的值，以确保对各种干扰的稳定性。为了解决该问题，需要将控制增益设定为适当。本文对弯管高度控制系统的阻尼系数进行估算，以根据阻尼系数调整控制增益。所提出的自适应控制器可确保鲁棒性和高控制性能，而不受轧制条件和干扰的变化影响。使用该方法，弯针高度控制既可以保证弯针高度控制的稳定性，又可以保证控制的高精度。

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