Guardian map approach to robust stability of interval systems

Shin-Ju Chen, Sung-Pei Yang and Lin-Goei Shiau

International Journal of Systems Science, 2012, vol. 43, issue 12, 2193-2201

Abstract: A systematic approach for the robust Hurwitz and Schur stability of the dynamic interval systems is proposed. An interval matrix is expressed as a linear fractional transformation (LFT) of an interconnection matrix with structured real parametric uncertainties. Based on guardian map theory and µ-analysis, a new approach is provided to derive the necessary and sufficient conditions in terms of the structured singular value (μ) ensuring the stability robustness of interval systems. This approach is feasible for both continuous- and discrete-time interval systems by a unified LFT framework, and it is applicable directly to D-stability for performance requirements.

Date: 2012
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DOI: 10.1080/00207721.2012.659700

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