Observer-based output feedback control of networked control systems with non-uniform sampling and time-varying delay |
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Authors: | Su Meng Jie Chen |
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Affiliation: | Key Laboratory of Intelligent Control and Decision of Complex System, Beijing Institute of Technology, Beijing, P.R. China |
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Abstract: | This paper investigates the problem of observer-based output feedback control for networked control systems with non-uniform sampling and time-varying transmission delay. The sampling intervals are assumed to vary within a given interval. The transmission delay belongs to a known interval. A discrete-time model is first established, which contains time-varying delay and norm-bounded uncertainties coming from non-uniform sampling intervals. It is then converted to an interconnection of two subsystems in which the forward channel is delay-free. The scaled small gain theorem is used to derive the stability condition for the closed-loop system. Moreover, the observer-based output feedback controller design method is proposed by utilising a modified cone complementary linearisation algorithm. Finally, numerical examples illustrate the validity and superiority of the proposed method. |
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Keywords: | Non-uniform sampling time-varying delay networked control systems output feedback control stability |
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