以面向对象的视角审视热轧带钢轧后冷却过程涉及的轧件、辊道、集管、冷却介质与仪表5要素,对轧件在辊道的传热过程、冷却水量和温度的控制过程进行分析、分解并抽象成类.利用面向对象的方法对卷取温度控制(coiling trmperature control,简称CTC)模型的体系结构进行设计,结合模型的触发逻辑进行对象设计,利用C++语言开发面向对象的卷取温度模型.基于有限差分计算方法的模型设定时间满足在线快速计算的要求,模型具有良好的可移植性和可扩展性.现场应用表明,冷却控制系统运行稳定,模型设定准确,卷取温度控制效果良好.
Five elements involved in the run-out table cooling process,that were hot-rolled strip,table roll,valve of spraying header,cooling agent and instrument,were highlighted from the object-oriented view.The heat transfer process of the hot strip and the controlling process of water flow and coiling temperature were firstly analyzed,then decomposed and finally presented by different classes.The hierarchy of the classes was designed by the object-oriented method and objects from the classes were also created according to the trigger logic of coiling temperature control (CTC) model developed by C+ + program language.The compute time for each setup of the CTC model based on the finite difference method (FDM) was short enough to meet the requirement of the on-line calculation.The CTC model had good portability and expandability.The on-site application of the object-oriented CTC model showed that the cooling control system can be steady in operation,the model setup was accurate and the coiling temperature along the whole strip length can be controlled very well.
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