International Journal of Control, Automation, and Systems

Institute of Control, Robotics and Systems (제어로봇시스템학회)
권호 표지

An Estimation of a Billet Temperature during Reheating Furnace Operation

  • Jang, Yu-Jin (Faculty of Department of Information & Communication Engineering, Dongguk University) ;
  • Kim, Sang-Woo (Faculty of Electrical and Computer Engineering Division, POSTECH)
  • Published : 2007.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Reheating furnace is an essential facility of a rod mill plant where a billet is heated to the required rolling temperature so that it can be milled to produce wire. Although it is very important to obtain information on billet temperatures, it is not feasible during furnace operation. Consequently, a billet temperature profile should be estimated. Moreover, this estimation should be done within an appropriate time interval for an on-line application. In this paper, a billet heat transfer model based on 2D FEM(Finite Element Method) with spatially distributed emission factors is proposed for an on-line billet temperature estimation and also a measurement is carried out for two extremely different furnace operation patterns. Finally, the difference between the model outputs and the measurements is minimized by using a new optimization algorithm named uDEAS(Univariate Dynamic Encoding Algorithm for Searches) with multi-step tuning strategy. The obtained emission factors are applied to a simulation for the data which are not used in the model tuning for validation.

Keywords

References

  1. Technical Report of Combustion Control for a Reheating Furnace 2nd ed., POSCON, 1999
  2. H. S. Ko, J.-S. Kim, T.-W. Yoon, M. K. Lim, D. R. Yang, and I. S. Jun, 'Modeling and predictive control of a reheating furnace,' Proc. of American Control Conf., Chicago, Illinois, pp. 2725-2729, 2000
  3. J. H. Choi, Y. J. Jang, and S. W. Kim, 'Temperature control of a reheating furnace using feedback linearization and predictive control,' Proc. of Interna-tional Conference on Control, Automation and Systems, Jeju, pp. 103-106, 2001
  4. J. G. Kim and K. Y. Huh, 'Prediction of transient slab temperature distribution in the re-heating furnace of a walking-beam type for rolling of steel slabs,' ISIJ International, vol. 40, no. 11, pp. 1115-1123, 2000 https://doi.org/10.2355/isijinternational.40.1115
  5. A Measurement of Heat Transfer in a Reheating Furnace and its Computation Method, a Subcommittee on Reheating Furnace, The Iron and Steel Institute of Japan, 1971
  6. L. M. Pedersen, Modeling and Control of Plate Mill Processes, Ph.D. thesis, Department of Automatic Control, Lund Institute of Technology, 1999
  7. FEMLAB Automatic Control Reference Manual, COMSOL, 2000
  8. Y. W. Kwon and H. C. Bang, The Finite Element Method Using MATLAB 2nd ed., CRC Press, 2000
  9. D. W. Pepper and J. C. Heinrich, The Finite Element Method, Basic Concepts and Applications, Hemisphere Pub. Corp., 1992
  10. Y.-Y Yang and Y.-Z. Lu, 'Development of a computer control model for slab reheating furnaces,' Computers in Industry, vol. 7, no. 2, pp. 145-154, 1986 https://doi.org/10.1016/0166-3615(86)90036-9
  11. J.-W. Kim and S. W. Kim, 'Numerical method for global optimization: Dynamic encoding algorithm for searches,' IEE Proc.-Control Theory Appl., vol. 151, no. 5, pp. 661-668, 2004 https://doi.org/10.1049/ip-cta:20040901
  12. J.-W. Kim and S. W. Kim, 'Parameter identification of induction motors using dynamic encoding algorithm for searches (DEAS),' IEEE Trans. on Energy Conversion, vol. 20, no. 1, pp. 16-24, 2005 https://doi.org/10.1109/TEC.2004.837287