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New Results on Stability and Stabilization of Networked Control Systems With Short Time-Varying Delay

, : New Results on Stability and Stabilization of Networked Control Systems With Short Time-Varying Delay. IEEE Transactions on Cybernetics (): -

NlmCategory="UNASSIGNED">New stability criteria and stabilization methods on networked control systems (NCSs) with short time-varying delay (STVD) are proposed in this paper. An NCS with STVD is transformed into a time-varying discrete time system. And then, this discrete time system is converted into a equivalent time-invariant system with norm-bounded uncertainties by using robust control techniques. Using this method, the conservatism of the stability condition caused by STVD can be reduced. Based on that, a single norm-bounded uncertainty is replaced by N norm-bounded uncertainties to further reduce conservatism. Theoretical analysis shows that when N is increased, the stability condition becomes less conservative. For a fixed sampling period, the obtained stability conditions explicitly depend on the upper and lower bounds of the time delay. The existence condition and design method for the controllers are also presented. Finally, three numerical examples are provided to demonstrate the effectiveness of the proposed scheme.


PMID: 26529795

DOI: 10.1109/TCYB.2015.2489563

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