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IQC based robust stability verification for a networked system with communication delays

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Abstract

In this paper, we consider robust stability analysis of a networked system with uncertain communication delays. Each of its subsystems can have different dynamics, and interconnections among its subsystems are arbitrary. It is assumed that there exists an uncertain but constant delay in each communication channel. Using the so called integral quadratic constraint (IQC) technique, a sufficient robust stability condition is derived utilizing a sparseness assumption of the interconnections, and a set of decoupled robustness conditions are further derived which depend only on parameters of each subsystem, the subsystem connection matrix (SCM) and the selected IQC multipliers. These characteristics result in an evident improvement of computational efficiency for robustness verification of the networked system with delay uncertainties, which is illustrated by some numerical results.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 61573209, 61733008).

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Authors and Affiliations

  1. Department of Automation and TNList, Tsinghua University, Beijing, 100084, China

    Zhike Wang & Tong Zhou

  2. School of Aviation Operations and Services, University of Air Force Aviation, Changchun, 130022, China

    Zhike Wang

Authors
  1. Zhike Wang
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  2. Tong Zhou
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Correspondence to Zhike Wang.

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Wang, Z., Zhou, T. IQC based robust stability verification for a networked system with communication delays. Sci. China Inf. Sci. 61, 122201 (2018). https://doi.org/10.1007/s11432-017-9318-2

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  • DOI: https://doi.org/10.1007/s11432-017-9318-2

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