AGC厚度控制系统及其在1780热卷板生产线的应用

分析了轧辊的弹跳现象和辊缝调节模型,介绍了AGC厚度控制系统中的厚度锁定方法、硬度前馈AGC,X射线测厚仪监控AGC、尾部补偿、活套补偿、自动复位等控制方法。河北钢铁集团承钢分公司1780热轧卷板生产线采用AGC厚度控制系统,带钢厚度偏差控制在0.05-0.1mm,满足了客户需求。

AGC厚度控制系统及其在1250热卷板生产线的应用

分析了轧辊的弹跳现象和辊缝调节模型,介绍了AGC厚度控制系统中的厚度锁定方法、硬度前馈AGC、X射线测厚仪监控AGC、尾部补偿、活套补偿、自动复位等控制方法。河北敬业集团1250热轧卷板生产线采用AGC厚度控制系统,带钢厚度偏差控制在0.05～0.10 mm,满足了客户需求。

冷轧过程中监控自动厚度控制系统的控制策略

针对具有纯滞后惯性环节的冷轧板带厚度控制系统,研究加入了Smith预估器的监控自动厚度控制(AGC)系统,并计算具有二阶最优特征的控制器参数,在定时采样情况下推导出显式控制率表达式。最后,将定时采样情况下的显式控制率与理论算法所得显式控制率进行比较,验证了该显式控制率表达式的正确性。

Algorithm design and application of novel GM-AGC based on mill stretch characteristic curve

As the spring equation is limited to the accuracy of mill stiffness and the linearity of the mill spring curve, the traditional gaugemeter automatic gauge control(GM-AGC) system based on spring equation cannot meet the requirements of practical production. In allusion to this problem, a kind of novel GM-AGC system based on mill stretch characteristic curve was proposed. The error existing in calculating strip thickness by spring equation were analyzed first. And then the mill stretch characteristic curve which could effectively eliminate the influence of mill stiffness was described. The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system, over 98.6% of the strip thickness deviation of 3.0 mm class can be controlled within the target tolerances of ±20 μm.

昆钢十二辊轧机厚控系统应用的初步认识

本文结合昆钢十二辊轧机厚控系统的工作原理,针对在生产过程中出现的故障问题,介绍了本人在参与处理故障工作中的一点体会。