Multivariable identification of a winding process by subspace methods for tension control

T. Bastogne, H. Noura, P. Sibille, A. Richard

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


The challenging problem of multivariable tension control in winding systems is addressed in this paper. Two control configurations, the SS model and the ST model configurations (SS: speed-speed and ST: speed-torque), are considered and applied to a pilot winding plant. The relevance of using linear models in such multivariable systems is examined. Tension simulations based on a proposed linear ST model yield interesting results in both open and closed-loops. Emphasis is also laid on the applicability of subspace methods to winding tension state-space model identification. Such methods simplify the problem of multivariable identification by reducing the associated polynomial model structural identification to the easier problem of order estimation. It is shown that the design of a Linear Quadratic Gaussian (LQG) controller capable of ensuring efficient performance over the entire winding zone can be based on an 'average' state-space model identified around a nominal operating point.

Original languageEnglish
Pages (from-to)1077-1088
Number of pages12
JournalControl Engineering Practice
Issue number9
Publication statusPublished - Sept 1998


  • LQG control
  • Metal
  • Multivariable identification
  • Pulp and paper processing
  • Subspace methods

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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