Abstract
Including servo valve, hydraulic cylinder, mill and sensor and ignoring nonlinear factors, the linear dynamic model of hydraulic automatic gage control (HAGC) system of a temper rolling mill was theoretically derived. The order of the model is 4/4, and can be reduced to 2/2. Based on modulating functions method, utilizing numerical integration, we constructed the equivalent identification model of HAGC, and the least square estimation algorithm was established. The input and output data were acquired on line at temper rolling mill in Shangshai Baosteel Group Corporation, and the continuous time model of HAGC system was estimated with the proposed method. At different modulating window intervals, the estimated parameters changed remarkably. When the frequency band-width of modulating filter matches that of estimated system, the parameters can be estimated accurately. Finally, the dynamic model of the HAGC was obtained and validated based on the spectral analysis result.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ginzburg V B. Dynamic characteristics of automatic gage control system with hydraulic actuators[J]. Iron and Steel Engineer, 1984, 1: 57–65.
Guo R M. Evaluation of dynamic characteristics of HAGC system[J]. Iron and Steel Engineer, 1991, 7: 52–63.
GAO Ying-jie, ZHAO Jing-yi, KONG Xiang-dong, et al. Dynamical simulation of hydraulic AGC system in a strip mill[J]. China Mechanical Engineering, 1998, 9(7): 23–26. (in Chinese)
Hnbehauen H, Rao G P. A review of identification in continuous-time systems[J]. Annual Review in Control, 1998, 22: 145–171.
Sagara S, Zhao Z Y. Numerical integration approach to on-line identification of continuous time systems[J]. Automatica, 1990, 26(1): 63–74.
Shinbrot M. On the analysis of linear and nonlinear systems[J]. Trans ASME, 1957, 79(3): 547–552.
Co T B, Ydstie B E. System identification using modulating functions and Fourier transforms[J]. Computers Chem Eng, 1990, 14(10): 1051–1066.
Preisig H A, Rippin D W T. Theory and application of the modulating function method—III: application to industrial process, a well-stirred tank reactor [J]. Computer Chem Engng, 1993, 17(1): 29–39.
Balestrino A, Landi A, Sani L. Parameter identification of continuous systems with multiple-input time delays via modulating Functions[J]. IEE Proc D Contr Theory Appl, 2000, 147(1): 19–27.
HE Shang-hong, ZHONG Jue. Identification of linear continuous-time system using wavelet modulating filters [J]. System Engineering and Electronics, 2004, 15(3): 270–277.
HU Guang-shu. Digital Signal Processing—Theory, Algorithms, and Implementation[M]. Beijing: Tsinghua University Press, 1997. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project (2003034466) supported by the China Postdoctoral Science Foundation; project (04JJ3029) supported by the Natural Science Foundation of Hunan Province, China; project (05A017) supported by Scientific Research Fund of Hunan Provincial Education Department
Rights and permissions
About this article
Cite this article
He, Sh., Zhong, J. Modeling and identification of HAGC system of temper rolling mill. J Cent. South Univ. Technol. 12, 699–704 (2005). https://doi.org/10.1007/s11771-005-0072-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-005-0072-3