Some problems in the stability of networked-control systems with periodic scheduling |
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Authors: | Xu-Guang Li Silviu-Iulian Niculescu Abdellatif Reama |
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Affiliation: | 1. Department of Embedded Systems , UPE , ESIEE Paris, 93162 Noisy-Le-Grand , France;2. Laboratoire des Signaux et Systèmes (L2S, UMR CNRS 8506) , CNRS-Supélec, 91192, Gif-Sur-Yvette , France;3. School of Information Science and Engineering , Northeastern University , Shenyang , Liaoning 110004 , China;4. Laboratoire des Signaux et Systèmes (L2S, UMR CNRS 8506) , CNRS-Supélec, 91192, Gif-Sur-Yvette , France;5. Department of Embedded Systems , UPE , ESIEE Paris, 93162 Noisy-Le-Grand , France |
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Abstract: | This article addresses three stability problems related to networked-control systems (NCSs) with periodic scheduling, where control systems may have multiple samplings in a hyperperiod (a hyperperiod is a periodically repeated scheduling sequence for all tasks in an NCS). As expected, the analysis of a system with multiple samplings is much richer than the case with single sampling. For example, a system with two samplings may be stable (unstable) even if it is unstable (stable) when sampled by either sampling. In this context, it is important to understand how network-induced delays and multiple samplings affect the system's stability. In this article, three particular stability problems involving constant and/or time-varying parameters are investigated, and the corresponding stability regions are derived. Numerical examples and various discussions complete the presentation. |
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Keywords: | networked-control systems stability time delay |
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