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A kind of plate laminar cooling strategy with high response and steady precision

  • Dian-hua Zhang
  • Na Zhou
  • Bing-xing Wang
  • Meng Zhang
Article

Abstract

After Smith Predictor being used to laminar cooling system, the control law for integral regulators is introduced. New notion of plate sample length is given for evading the delay time varying with the roll table speed. It is found that the integral algorithm is more controllable for system regulating process and has better steady state precision. Compared with the traditional control strategies, the new control law has faster response speed and higher steady state precision. The controller can be regulated in shorter time and the response is faster than that of routine controller and it can effectively eliminate the oscillatory instability. Owing to its easy realization and high stability, it has been applied to a plate mill. The accuracy of finish cooling temperature can be controlled within ±10 °C.

Key words

plate laminar cooling Smith Predictor time delay system 

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References

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Copyright information

© China Iron and Steel Research Institute Group 2010

Authors and Affiliations

  • Dian-hua Zhang
    • 1
  • Na Zhou
    • 1
  • Bing-xing Wang
    • 1
  • Meng Zhang
    • 1
  1. 1.State Key Laboratory of Rolling and AutomationNortheastern UniversityShenyang, LiaoningChina

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