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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 145The Integrated Robust Control of Interstand Strip...

The Integrated Robust Control of Interstand Strip Tension for Tandem Cold Rolling Mill

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Abstract:

We describe an integrated tension controller design for a tandem cold rolling mill in steel plants. To achieve stable rolling and ensure strip quality, it is very important to control the tension of the cold rolling mill. Previous researches examined only the operation of a single stand. But it is not sufficient to examine the operation and effect of whole stands because the operation is wholly interdependent. To solve the problem, this paper proposes an integrated control strategy for tension control of tandem cold mill, the full stand model for the tension system of a tandem cold mill is built, and the interaction of all the stands is analyzed. Then applying the method of μ-synthesis design a integrated robust tension controller. Simulation with the practical data proves the integrated robust tension controller can achieve more robust performance than that of typical industrial approach.

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Advances in Rolling Equipment and Technologies

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Periodical:

Advanced Materials Research (Volume 145)

Pages:

230-237

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.145.230

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Online since:

October 2010

Authors:

Xiao Feng Zhang, Qing Dong Zhang, Meng Yu, Kang Jian Wang, Pei Jie Huang

Keywords:

Integrated Control, Robust Control, TCM, Tension Control

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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[10] D.W. Gu, P. Hr. Petkov and M.M. Konstantinov: Robust Control Design with MATLAB (Springer, German 2005). Appendix The parameters of the input/output dynamics matrix of the full stands tension system.

[2] 10. 00 0 0 0 0 0 0 0 10. 00 0 0 0 20. 25 0 0 0 0 0 0 0 2. 021 0 0 0.

0 10. 00 0 0 0 0 0 0 10. 00 0 0 17. 11 0 12. 38 0 0 0 0 0 0 0 0 0.

0 0 0 10. 00 0 0 0 0 0 10. 00 0.

0 14. 17 0 8. 57 0 0 0 0 0 0 0.

0 0 0 0 0 10. 00 0 0 0 0 10. 00.

0 0 0 8. 71 0 5. 66 0 0 0 0 0 , A B − − − − = = − − − −                                                   .

[1] [5] [0] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 6. 00 2. 25 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 3. 47 2. 25 0 0 0 0 0 0 0 0.

[10] [0] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 2. 25 2. 25 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 1. 49 2. 25 B − − = × − −                          .

[1] 10. 00 0 0 0 0 0 0 0 0. 70 0 0 0 0 0 0 0.

0 0 0 0 0 0 0.

0 0 0 0 0 0 0.

0 10. 00 0 0 0 0 0.

0 0. 75 0 0 0 0 0.

0 0 0 0 0 0 0.

0 0 0 0 0 0 0.

0 0 0 10. 00 0 0 0.

0 0 0 0. 80 0 0 0.

0 0 0 0 0 0 0.

0 0 0 0 0 10. 00 0.

0 0 0 0 0 0. 80 0.

0 0 0 0 0 0 0.

0 0 0 0 0 0 0.

0 0 0 0 0 0 0 C − − = − −                                     .

[2] [0] 1. 00 0 0 0 0 0 0.

0 0 1. 00 0 0 0 0.

0 0 0 0 1. 00 0 0.

0 0 0 0 0 0 1. 00 C =                         .

[11] 0. 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0. 10 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0. 14 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0. 20 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0. 10 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0. 08 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0. 20 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 D − − − − − − = − 0 0 0. 10 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0. 05 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0. 20 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0. 10 0.

0 0 0 0 0 0 0 0 0 0 0 0 0 0. 03 0 − − − − −                                                  .

[1] 2.

[1] 0 . 0 0 0 0 0.

0 0 0.

0 0 0.

0 0 0.

1 0 . 0 0 0 0.

0 0 0.

0 0 0.

0 0 0.

0 1 0 . 0 0 0.

0 0 0.

0 0 0.

0 0 0.

0 0 1 0 . 0 0.

0 0 0.

0 0 0.

0 0 0 D =                                                  .