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Total Stability Properties Based on Fixed Point Theory for a Class of Hybrid Dynamic Systems

Abstract

Robust stability results for nominally linear hybrid systems are obtained from total stability theorems for purely continuous-time and discrete-time systems by using the powerful tool of fixed point theory. The class of hybrid systems dealt consists, in general, of coupled continuous-time and digital systems subject to state perturbations whose nominal (i.e., unperturbed) parts are linear and, in general, time-varying. The obtained sufficient conditions on robust stability under a wide class of harmless perturbations are dependent on the values of the parameters defining the over-bounding functions of those perturbations. The weakness of the coupling dynamics in terms of norm among the analog and digital substates of the whole dynamic system guarantees the total stability provided that the corresponding uncoupled nominal subsystems are both exponentially stable. Fixed point stability theory is used for the proofs of stability. A generalization of that result is given for the case that sampling is not uniform. The boundedness of the state-trajectory solution at sampling instants guarantees the global boundedness of the solutions for all time. The existence of a fixed point for the sampled state-trajectory solution at sampling instants guarantees the existence of a fixed point of an extended auxiliary discrete system and the existence of a global asymptotic attractor of the solutions which is either a fixed point or a limit globally stable asymptotic oscillation.

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Correspondence to M. De la Sen.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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De la Sen, M. Total Stability Properties Based on Fixed Point Theory for a Class of Hybrid Dynamic Systems. Fixed Point Theory Appl 2009, 826438 (2009). https://doi.org/10.1155/2009/826438

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  • DOI: https://doi.org/10.1155/2009/826438

Keywords

  • Dynamic System
  • Differential Geometry
  • Stability Property
  • Point Theory
  • Computational Biology