Bounded Real Lemma for Structured Noncommutative Multidimensional Linear Systems and Robust Control

  • Authors:
  • Joseph A. Ball;Gilbert Groenewald;Tanit Malakorn

  • Affiliations:
  • Department of Mathematics, Virginia Tech, Blacksburg, Virginia 24061-0123;Department of Mathematics, North West University, Potchefstroom, South Africa 2520;Department of Electrical and Computer Engineering, Naresuan University, Phitsanulok, Thailand 65000

  • Venue:
  • Multidimensional Systems and Signal Processing
  • Year:
  • 2006

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Abstract

We obtain a standard Bounded Real Lemma and a strict Bounded Real Lemma for the class of input/state/output linear systems with evolution along a free semigroup recently introduced by the authors. As an application we show the equivalence of this result with a recent result from robust control theory: the structured 驴-singular value of an operator (taken in a certain uniform sense) is equal to its upper bound computed via diagonal scalings in case the structured singular value is taken with respect to the collection of time-varying perturbations given by a linear-fractional model.