**Page description appears here**

“Input saturation in nonlinear multivariable processes resolved by nonlinear decoupling”

Authors: Jens G. Balchen and Bjarne Sandrib,
Affiliation: NTNU, Department of Engineering Cybernetics
Reference: 1995, Vol 16, No 2, pp. 95-106.

     Valid XHTML 1.0 Strict


Keywords: Multivariable control, saturation, nonlinear decoupling

Abstract: A new method is presented for the resolution of the problem of input saturation in nonlinear multivariable process control by means of elementary nonlinear decoupling (END). Input saturation can have serious consequences particularly in multivariable control because it may lead to very undesirable system behaviour and quite often system instability. Many authors have searched for systematic techniques for designing multivariable control systems in which saturation may occur in any of the control variables (inputs, manipulated variables). No generally accepted method seems to have been presented so far which gives a solution in closed form. The method of elementary nonlinear decoupling (END) can be applied directly to the case of saturation control variables by deriving as many control strategies as there are combinations of saturating control variables. The method is demonstrated by the multivariable control of a simulated Fluidized Catalytic Cracker (FCC) with very convincing results.

PDF PDF (1153 Kb)        DOI: 10.4173/mic.1995.2.2



DOI forward links to this article:
  [1] Michael J. Kurtz and Michael A. Henson (1997), doi:10.1016/S0959-1524(96)00006-6
  [2] A.G. Montandon, R.M. Borges and H.M. Henrique (2006), doi:10.3182/20060402-4-BR-2902.00415


References:
[1] BALCHEN, J.G. (1993). Design of the property transformation in elementary nonlinear decoupling of multivariable processes, Modeling, Identification and Control, 14, 219-227 doi:10.4173/mic.1993.4.3
[2] BALCHEN, J.G. SANDRIB, B.J. (1994). Elementary nonlinear decoupling control of composition in binary distillation columns, IFAC Symp. ADCHEM´94, Kyoto, Japan, May 1994.
[3] BALCHEN, J.G., LJUNGQUIST, D. STRAND, S. (1992). State-space predictive control, Chemical Engineering Science, 47, 787-807 doi:10.1016/0009-2509(92)80268-H
[4] BIEGLER, L.T. (1984). Solution of dynamic optimization problems by successive quadratic programming and orthogonal collocation, Comp. Chem. Engn., 5, 243-248 doi:10.1016/0098-1354(84)87012-X
[5] ISIDORI, A. (1989). Nonlinear Control Systems (2nd ed, ) (Springer Verlag, Berlin).
[6] KOTHARE, M.V., CAMPO, P.J., MORARI, M. NETT, C.N. (1993). A unified framework for the study of anti-windup designs, AIChE Annual Meeting. St. Louis, Paper no. 149d.
[7] LJUNGQUIST, D. (1990). On-line estimation in nonlinear state-space models with application to catalytic cracking, Dr. ing Thesis, Department of Engineering Cybernetics, The Norwegian Institute of Technology, Trondheim, Report nx-1990:89W.
[8] SINGSTAD, P. (1992). Modelling and multivariable control of high pressure autoclave reactors for polymerization of ethene, Department of Engineering Cybernetics, The Norwegian Institute of Technology, Trondheim. Report ITK- I992:29-W.


BibTeX:
@article{MIC-1995-2-2,
  title={{Input saturation in nonlinear multivariable processes resolved by nonlinear decoupling}},
  author={Balchen, Jens G. and Sandrib, Bjarne},
  journal={Modeling, Identification and Control},
  volume={16},
  number={2},
  pages={95--106},
  year={1995},
  doi={10.4173/mic.1995.2.2},
  publisher={Norwegian Society of Automatic Control}
};

News

May 2016: MIC reaches 2000 DOI Forward Links. The first 1000 took 34 years, the next 1000 took 2.5 years.


July 2015: MIC's new impact factor is now 0.778. The number of papers published in 2014 was 21 compared to 15 in 2013, which partially explains the small decrease in impact factor.


Aug 2014: For the 3rd year in a row MIC's impact factor increases. It is now 0.826.


Dec 2013: New database-driven web-design enabling extended statistics. Article number 500 is published and MIC reaches 1000 DOI Forward Links.


Jan 2012: Follow MIC on your smartphone by using the RSS feed.

Smartphone


July 2011: MIC passes 1000 ISI Web of Science citations.


Mar 2010: MIC is now indexed by DOAJ and has received the Sparc Seal seal for open access journals.


Dec 2009: A MIC group is created at LinkedIn and Twitter.


Oct 2009: MIC is now fully updated in ISI Web of Knowledge.