A time-varying output feedback controller for nonlinear systems with linear output structure

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    Abstract

    This paper presents a solution for the design of a time-varying and parametric output feedback controller for known general nonlinear dynamic systems subjected to linear output structure. The controller consists of two parts:- an adaptive observer and a time-varying controller. Under a certain assumption on the nonlinear dynamics of the system, a stable and nonlinear adaptive observer can be firstly built This observer can be logically combined with any pre-specified smooth nonlinear controller that uses the estimated state feedback with another set of tuning parameters. A combined parameter dependent Lyapunov function is constructed and used to formulate an effective tuning rule for the time-varying parameters involved in both the observer and the control function. With this selection of the tuning rule, it has been shown that the closed loop system is stable. An example is included to illustrate the use of the proposed methods and encouraging results have been obtained. © 2004 IEEE.
    Original languageEnglish
    Title of host publicationIEEE International Symposium on Intelligent Control - Proceedings|IEEE Int Symp Intell Control Proc
    Pages340-345
    Number of pages5
    Publication statusPublished - 2004
    EventProceedings of the 2004 IEEE International Symposium on Intelligent Control - 2004 ISIC - Taipei
    Duration: 1 Jul 2004 → …

    Conference

    ConferenceProceedings of the 2004 IEEE International Symposium on Intelligent Control - 2004 ISIC
    CityTaipei
    Period1/07/04 → …

    Keywords

    • Lyapunov method
    • Nonlinear systems
    • Observer
    • Stability
    • State feedback and adaptive tuning rules

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