Stability of bimodal planar switched linear systems with both stable and unstable subsystems

Swapnil Tripathi and Nikita Agarwal

International Journal of Systems Science, 2022, vol. 53, issue 15, 3254-3285

Abstract: We study dynamics of a bimodal planar linear switched system with a Hurwitz stable and an unstable subsystem. For given flee time from the unstable subsystem, the goal is to find corresponding dwell time in the Hurwitz stable subsystem so that the switched system is asymptotically stable. The dwell-flee relations obtained are in terms of certain smooth functions of the eigenvalues and (generalised) eigenvectors of the subsystem matrices. The results are extended to a special class of symmetric bilinear systems. The results are also extended to a multimodal planar linear switched system in which the switching is governed by an undirected star graph, where the internal node corresponds to a Hurwitz stable (unstable, respectively) subsystem and all the leaves correspond to unstable (Hurwitz stable, respectively) subsystems. For this multimodal system, dwell-flee relations are obtained as solutions of a minimax optimisation problem.

Date: 2022
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DOI: 10.1080/00207721.2022.2079752

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