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应用测厚计原理(BISRA)进行带钢厚度自动控制,是带钢厚度自动控制主要方法之一。它是以轧机弹跳方程作为系统的设定模型,又直接用它作为系统的控制模型。由于传统弹跳方程在结构上的缺陷,使用厚度计原理进行厚度控制时,都以X光测厚仪作为监控,对最终成品厚度进行修正。当轧薄规格时,即进入负辊缝后,则切除压力反馈厚控系统或以X光测厚反馈进行工作。通过模拟试验,在原有弹跳方程的基础上,推导了精确厚控方程和负辊缝下的厚控方程,解决了模型在实际应用中造成的缺陷,并在太钢炉卷轧机液压厚度自动控制改造中首次应用,取得了满意的效果。本文将讨论模型的精度、模型各参量的精度对成品板精度的影响,推导了保持系统稳定刚度值设定的工艺边界条件,最后导出了负辊缝下的厚控方程作为厚控模型的补充。
Application of thickness gauge principle (BISRA) strip thickness automatic control, strip thickness is one of the main methods of automatic control. It is based on mill roll equation as a system setting model, but also directly use it as the system control model. Due to the structural defects of the traditional bounce equation and the thickness control by using the gauge principle, the X-ray thickness gauge is used as the monitor to correct the thickness of the final product. When thinning specifications, that is, into the negative roll gap, then cut off the pressure feedback thickness control system or X-ray thickness measurement feedback work. Based on the original bounce equation, the precise thickness control equation and the thick control equation under the negative roll gap are deduced through the simulation test, which solves the defects caused by the actual application of the model. In the automatic control of hydraulic thickness of TISCO furnace roll mill, For the first time in the application of transformation, and achieved satisfactory results. This article will discuss the accuracy of the model, the accuracy of the model parameters on the precision of the finished product, derive the process boundary conditions for maintaining the system stability stiffness value, and finally derive the thickness control equation under the negative roll gap as a supplement to the thickness control model .