Introduction

Jean-François Magni
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Jean-François Magni: CERT/DCSD, ONERA-Toulouse

A chapter in Robust Modal Control with a Toolbox for Use with MATLAB®, 2002, pp 1-3 from Springer

Abstract: Abstract Robust control theory has received much attention in the past decades. The most popular approaches are based on frequency domain analysis and design. Early work in this field can be found in [Rosenbrok, 1974], or [Horowitz, 1991]. The most representative modern frequency domain techniques are Loop Transfer Recovery [Doyle and Stein, 1979, Ma­ciejowski, 1989],H∞-synthesis [Doyle et al., 1989, McFarlane and Glover, 1990], µ-synthesis [Zhou and Doyle, 1999] and their LMI-based (Linear Matrix Inequality) extensions. Unfortunately, these techniques are not very efficient for problems with respect to real pa­rameter variations. Alternative techniques which are involving robustness more appropriate for dealing with real uncertainties have also been considered, for exam­ple: quadratic stability [Garcia et al., 1997, Khargonekar et al., 1990], adaptation of µ-synthesis [Young, 1996] value set and parameter space techniques [Barmish, 1994, Ackermann, 1993] and so on. But for various reasons (such as: conservatism — special requirements relative to the de­pendency on uncertainties — limitations on the number of uncertainties — very large controller orders) these techniques do not really solve the general problem. As we shall see in this book, multi-model control design based on modal approaches, despite some more or less heuristic features, is very efficient, especially in the case of real uncertainties.

Keywords: Linear Matrix Inequality; Frequency Domain Analysis; Pole Assignment; Design Freedom; Quadratic Stability (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1007/978-1-4615-0637-9_1

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