대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제26권8호
  • /
  • Pages.1680-1689
  • /
  • 2002
  • /
  • 1226-4873(pISSN)
  • /
  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

열간사상압연기의 루퍼시스템의 ILQ 제어기 설계

Design of an ILQ Looper Controller for Rot Strip Mills

  • 발행 : 2002.08.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This paper studies on the design of a looper control system for hot strip mill finisher using ILQ(Inverse Linear Quadratic optimal control) control method. The loopers are placed between each rolling stands and looper control plays an important role in regulating strip tension. The strip tension is controlled by raising and lowering the looper and by changing the speed of main work rolls. Firstly, it is shown from a nonlinear dynamic simulation that the strip tension is more influenced by difference of rolling speed than that of the looper angle. Secondly, a servo controller of the looper is designed using ILQ control method of which the characteristics and algorithms are simply introduced. Finally, the performances of the ILQ servo controller are compared with those of the LQI servo controller from computer simulation. In result, it is shown that the proposed ILQ servo controller has the better performances and robustness far parameter perturbations and disturbances than those of LQI controller.

키워드

참고문헌

  1. Okata, M. Murayama, K. Vrana, A. Iwasaki, Y., Kawano, A. and Shiomi, H. 1998, 'Optimal Control System for Hot Strip Finishing Mill,' Control Engineering Practice https://doi.org/10.1016/S0967-0661(98)00102-6
  2. Anbe, Y. Sekiguchi, K. and Imanari, H., 1996, 'Tension Control of a Hot Strip Mill Finisher,' Toshiba Coporation, IFAC
  3. Imanari, H. Morimatsu, Y. Sekiguchi, K. Ezure, H. Matuoka, R. Tokuda, A. and Otobe, H., 1997, 'Looper H-Infinity Control for Hot-Strip Mills,' IEEE Transactions on Industry Applications, Vol. 33, No.3 https://doi.org/10.1109/28.585871
  4. Hesketh, T. Jiang, Y. A. Clements, D. J. Butler, D. H. and Van Der Laan, R., 1998, 'Controller Design for Hot Strip Finishing Mills,' IEEE Transactions on Control Systems Technology, Vol. 6, No.2 https://doi.org/10.1109/87.664188
  5. Hearns, G. Katebi, M. R. and Grimble, M. J., 1996, 'Robust Control of a Hot Strip Mill Looper,' IFAC 13th Triennial World Congress, pp. 445-450
  6. Price, J. C., 1973, 'The Hot Strip Mill Looper System,' IEEE Trans. Ind. Applicat., Vol. 27, pp. 556-562 https://doi.org/10.1109/TIA.1973.349940
  7. Hearns, G. and Grimble, M. J., 1997, 'Multivariable Control of a Hot Strip Finishing Mill,' Proceedings of the American Control Conference Albuquerque, New Mexico, pp. 3775-3779 https://doi.org/10.1109/ACC.1997.609552
  8. Asano, K. Yamamoto, K. and Kawase, T., 2000, 'Hot Strip Mill Tension Looper Control Based on Decentralization and Coordination,' Control Engineering Practice https://doi.org/10.1016/S0967-0661(99)00186-0
  9. Kimura, H. Fujii, T. and Mori, T., 1994, 'Robust control,' yulona, pp. 109-156
  10. POSCO, 1993, 'Report of a collaborative research of CRM for equipping NEW TYPE AGC at Gwang-Yang Steel Mill Plats No.5,' POSCO
  11. Lee, M. H. Moon, Y. H. and Hwang. I. C., 2001, 'Development of a High-Precision Automatic Control System for Hot-Strip Mill Finisher,' POSCO