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

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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.

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Authors and Affiliations

  1. State Key Laboratory of Rolling and Automation(Northeastern University), Shenyang, 110819, China

    Ya-feng Ji  (姬亚锋), Dian-hua Zhang  (张殿华), Shu-zong Chen  (陈树宗), Jie Sun  (孙杰), Xu Li  (李旭) & Hong-shuang Di  (邸洪双)

Authors
  1. Ya-feng Ji  (姬亚锋)
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  2. Dian-hua Zhang  (张殿华)
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  3. Shu-zong Chen  (陈树宗)
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  4. Jie Sun  (孙杰)
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  5. Xu Li  (李旭)
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  6. Hong-shuang Di  (邸洪双)
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Corresponding author

Correspondence to Ya-feng Ji  (姬亚锋).

Additional information

Foundation item: Project(51074051) supported by the National Natural Science Foundation of China; Project(N110307001) supported by the Fundamental Research Funds for the Central Universities, China

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Ji, Yf., Zhang, Dh., Chen, Sz. et al. Algorithm design and application of novel GM-AGC based on mill stretch characteristic curve. J. Cent. South Univ. 21, 942–947 (2014). https://doi.org/10.1007/s11771-014-2022-4

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  • DOI: https://doi.org/10.1007/s11771-014-2022-4

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