“Stochastic Modelling and Self Tuning Control of a Continuous Cement Raw Material Mixing System”

Authors: T. Westerlund, Hannu T. Toivonen and K-E Nyman,
Affiliation: Åbo Akademi, Finland and Oy Partek, Finland
Reference: 1980, Vol 1, No 1, pp. 17-37.

Keywords: Stochastic modelling, self-tuning control, adaptive control, computer control, stochastic control, self-adjusting systems, cement industry, chemical variables control

Abstract: The control of a continuously operating system for cement raw material mixing is studied. The purpose of the mixing system is to maintain a constant composition of the cement raw meal for the kiln despite variations of the raw material compositions. Experimental knowledge of the process dynamics and the characteristics of the various disturbances is used for deriving a stochastic model of the system. The optimal control strategy is then obtained as a minimum variance strategy. The control problem is finally solved using a self-tuning minimum variance regulator, and results from a successful implementation of the regulator are given.

PDF PDF (2729 Kb)        DOI: 10.4173/mic.1980.1.2

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[1] Juan M. Martín-Sánchez, João M. Lemos and José Rodellar (2012), doi:10.1002/acs.2313
[2] P.M. Mäkilä (1984), doi:10.1016/0005-1098(84)90017-7
[3] K. Najim and M.M. Saad (1991), doi:10.1016/0959-1524(91)80004-4
[4] K.J. Åström (1983), doi:10.1016/0005-1098(83)90002-X
[5] Mikko Korpi, Hannu Toivonen and Björn Saxén (2003), doi:10.1016/S1570-7946(03)80203-1
[6] H. Unbehauen (1986), doi:10.1016/B978-0-08-032554-5.50006-9
[7] P. Lin, P. Prevot and J.P. Barbier (1989), doi:10.1016/B978-0-08-035738-6.50069-0
[8] J. Hetthèssy, I. Vajk, R. Haber, M. Hilger and L. Keviczky (1984), doi:10.1016/B978-0-08-029980-8.50034-2
[9] Dimitris Tsamatsoulis (2014), doi:10.1002/cjce.22043
[10] K.J. Astrom (1987), doi:10.1109/PROC.1987.13721
[11] P. Lin, P. Prevot and J.P. Barbier (1988), doi:10.1016/S1474-6670(17)54986-1
[12] P. Lin, M. Miquel, P. Prevot and J.P. Barbier (1989), doi:10.1016/S1474-6670(17)53128-6
[13] H. Unbehauen (1985), doi:10.1016/S1474-6670(17)60106-X
[14] K.E. Nyman (1983), doi:10.1016/S1474-6670(17)64260-5
[15] K.T. Westerlund (1983), doi:10.1016/S1474-6670(17)64261-7
[16] J. Hetthèssy, I. Vajk, R. Haber, M. Hilger and L. Keviczky (1983), doi:10.1016/S1474-6670(17)62663-6
[17] G. Bavda and J. Kocijan (2007), doi:10.1177/0142331207070362
[1] ÅSTRÖM, K.J. (1970). Introduction to Stochastic Control Theory, Academic Press.
[2] ÅSTRÖM, K.J., BORISSON, U., LJUNG, L., WITTENMARK, B. (1977). Theory and applications of self-tuning regulators, Automatica, 13, 457-476 doi:10.1016/0005-1098(77)90067-X
[3] ÅSTRÖM, K.J., WITTENMARK, B. (1973). On self-tuning regulators, Automatica, 9, 185-199 doi:10.1016/0005-1098(73)90073-3
[4] BORISSON, U., SYDING, R. (1976). Self-tuning control of an ore crusher, Automatica, 12, 1-7 doi:10.1016/0005-1098(76)90063-7
[5] BORISSON, U., WITTENMARK, B. (1974). An industrial application of a self-tuning regulator, 4th IFAC Symposium on Digital Computer Applications to Process Control, Zürich, Switzerland.
[6] CEGRELL, T., HEDQVIST, T. (1975). Successful adaptive control of paper machines, Automatica, 11, 53-59 doi:10.1016/0005-1098(75)90008-4
[7] EYKHOFF, P. (1974). System Identification, Wiley, .
[8] HAMMARSTRÖM, L.G., NYMAN, K.-E., GROS, K.S., WALLER, K.V.T. (1978). Optimal computer control of a cement raw mill - a case study, Kemia-Kemi, 5, 208-211.
[9] HAMMER, H. (1972). Computer controlled raw meal production in cement industry, Regelungstechnik, 20, 190-198.
[10] HIGHAM, J.D. (1968). Single-term control of first- and second-order processes with dead time, Control, 12, 136-140.
[11] JENSEN, L., HANSEL, R. (1974). Computer control of an enthalphy exchanger, Report 7417. Department of Automatic Control, Lund Institute of Technology, Sweden.
[12] KEVICZKY, K., HETTHESSY, J., HILGER, M., KOLOSTORI, J. (1978). Self-tuning adaptive control of cement raw material blending, Automatica, 14, 525-532 doi:10.1016/0005-1098(78)90042-0
[13] KÄLLSTROM, C.G., ÅSTRÖM, K.J., THORELL, N.E., ERIKSSON, J., STEN, L. (1978). Adaptive autopilots for steering of large tankers, IFAC Congress, Helsinki, Finland.
[14] LAURÉN, K.-G. (1978). Raw meal preparation - a new technological system, 13th International Cement Seminar, Rock Products, Chicago, U.S.A.
[15] LUNDÁN, A., MATTILA, O. (1974). A system for the control of the homogenization of the cement raw meal, 4th IFAC Symposium on Digital Computer Applications to Process Control, Zürich, Switzerland.
[16] NYMAN, K.-E. (1976). Computer control of cement raw material mixing, in Swedish. Report OY Partek Ab, Pargas, Finland.
[17] SASTRY, V.A., SEBORG, D.E., WOOD, R.K. (1977). Self-tuning regulator applied to a binary distillation column, Automatica, 13, 417-424 doi:10.1016/0005-1098(77)90026-7
[18] TOIVONEN, H. (1977). Self-tuning minimum variance control of multivariable systems, Report 77-6, The Institute for Automatic Control, Åbo Akademi, Finland.
[19] WESTERLUND, T. (1979). Sensitivity and optimal tuning of linear time-invariant controllers with a stationary quadratic loss function, Report 79-18-W, Division of Engineering Cybernetics, The Norwegian Institute of Technology, Norway.

  title={{Stochastic Modelling and Self Tuning Control of a Continuous Cement Raw Material Mixing System}},
  author={Westerlund, T. and Toivonen, Hannu T. and Nyman, K-E},
  journal={Modeling, Identification and Control},
  publisher={Norwegian Society of Automatic Control}