Abstract

This paper describes how to control strip gauge, looper angle, and strip tension for a hot strip finishing mill and the application result. This is based on the optimal servo theory and the model dccoupling method. In finishing mill process, there exists mutual interaction among strip gauge, Iooper angle, and strip tension. Conventionally, each of them is controlled independently. To improve the control perfonnance, the multivariable control considering this interaction is applied to all productions. The new control system is also used for the tension control of the automatic width control.

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