On asymptotic stabilisation of a chain of integrators with nonlinearity and an uncertain input delay by output feedback

Ho-Lim Choi

International Journal of Systems Science, 2014, vol. 45, issue 12, 2637-2644

Abstract: In this paper, we provide an output feedback solution over one given by Choi and Lim [Systems & Control Letters, 59(6), 374–379 (2010)] under more generalised system set-up. More specifically, we consider a stabilisation problem of a chain of integrators that has nonlinearity and an uncertain delay in the input by output feedback. The nonlinearity is classified into four types. Then, we propose a memoryless output feedback controller which contains a gain-scaling factor to adjust controller gains depending on the given nonlinearity type. Our stability analysis shows that the controlled system has unique stabilisation result associated with each type of nonlinearity. Our result provides a new aspect to the stabilisation problem of nonlinear time-delay systems and broadens the existing control results of time-delay systems. Two examples are given for illustration.

Date: 2014
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DOI: 10.1080/00207721.2013.775382

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