Brief Paper: Anti-Windup Designs for Multivariable Controllers

  • Authors:

  • YOUBIN PENG;DAMIR VRANI;RAYMOND HANUS;STEVEN S. R. WELLER

  • Affiliations:

  • Department of Control Engineering, Free University of Brussels, Avenue Franklin D. Roosevelt 50, B-1050, Brussels, Belgium;Department of Computer Automation and Control, J. Stefan Institute, Jamova 39, 1001 Ljubljana, Slovenia;Department of Control Engineering, Free University of Brussels, Avenue Franklin D. Roosevelt 50, B-1050, Brussels, Belgium;Department of Electrical and Computer Engineering, University of Newcastle, Callaghan NSW 2308, Australia

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 1998

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Abstract

This paper addresses two important aspects of anti-windup (AW) designs, namely the parametrization of linear AW compensators, and the role of artificial nonlinearity (AN) in the design of AW compensators for multivariable systems. For the first issue, a simple parametrization is given using the classical feedback structure in the framework of constrained unity-feedback multivariable control systems. For the second issue, two existing AN designs for coordinating plant inputs whenever one plant input enters saturation are reviewed. A comparative simulation study illustrates that the conditioning technique, enhanced by optimal AN design, gives the best tracking performance among different existing methods.