Stabilization of Linear Systems with Structured Perturbations

Lu, Wei-Min and Zhou, Kemin and Doyle, John C. (1993) Stabilization of Linear Systems with Structured Perturbations. Technical Report. California Institute of Technology, Pasadena, CA. [CaltechCDSTR:1993.014]

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Abstract

The problem of stabilization of linear systems with bounded structured uncertainties are considered in this paper. Two notions of stability, denoted quadratic stability (Q-stability) and µ-stability, are considered, and corresponding notions of stabilizability and detectability are defined. In both cases, the output feedback stabilization problem is reduced via a separation argument to two simpler problems: full information (FI) and full control (FC). The set of all stabilizing controllers can be parametrized as a linear fractional transformation (LFT) on a free stable parameter. For Q-stability, stabilizability and detectability can in turn be characterized by Linear Matrix Inequalities (LMIs), and the FI and FC Q-stabilization problems can be solved using the corresponding LMIs. In the standard one-dimensional case the results in this paper reduce to well-known results on controller parametrization using state-space methods, although the development here relies more heavily on elegant LFT machinery and avoids the need for coprime factorizations.

EPrint Type:	Monograph (Technical Report)
Additional Information:	The authors would like to thank Prof. A. Packard at UC Berkeley for helpful discussion. They also gratefully acknowledge helpful comments about the previous versions of this paper from C. Beck, B. Bodenheimer, J. Morris, F. Paganini and J. Tierno. Support for this work was provided by NSF, AFOSR, and ONR.
Subjects:	All Records
ID Code:	83
Deposited By:	Caltech Library System
Deposited On:	01 September 2006
Unique Identifier:	CaltechCDSTR:1993.014
Official Persistent URL:	http://resolver.caltech.edu/CaltechCDSTR:1993.014
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