Algorithm design and application of novel GM-AGC based on mill stretch characteristic curve
来源期刊：中南大学学报(英文版)2014年第3期
论文作者：姬亚锋 张殿华 CHEN Shu-zong(陈树宗) SUN Jie(孙杰) 李旭 DI Hong-shuang(邸洪双)
文章页码：942 - 947
Key words：hot strip mill; gauge meter automatic gauge control; mill stretch characteristic curve; mill stiffness
Abstract: 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.
JI Ya-feng(姬亚锋), ZHANG Dian-hua(张殿华), CHEN Shu-zong(陈树宗), SUN Jie(孙杰), LI Xu(李旭), DI Hong-shuang(邸洪双)
(State Key Laboratory of Rolling and Automation(Northeastern University), Shenyang 110819, China)
Abstract: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.
Key words:hot strip mill; gauge meter automatic gauge control; mill stretch characteristic curve; mill stiffness
