连铸二次冷却自控模型

本文在应用铸坯凝固传热数学模型离线计算的基础上,并参照电路瞬态过程参量变化规律,提出了新的连铸二冷水量动态控制模型。它系采用前馈控制方式,拉速变化时过渡过程中水量变化曲线呈指数形式。该模型具有快速简便而精确的优点经计算机仿真验证,该动态控制模型的控制效果明显地优于一般静态比例控制。

Automatic Control Model of Secondary Cooling in Continuous Casting

On the basis of simulating calculation with heat transfer model, and employing the principle of transition in electric circuit,a automatic control model of secondary, cooling in continuous casting is developed in this paper. The feedforward control pattern is applied, and the change curve of the water flowrate during the transitive proce (?) adopts the exponentia form.This model has the advantages of simplicity and better precision. Moreover it has a characteristic of restraining the fluctuation of surface temperature quickly owing to not using any feedbaek informations from the system.Through offline simulation it is proved that the control effect of this dynamic control model is evidently superior to that of any static control.