Adaptive observer design for a class of nonlinear interconnected systems with uncertain time varying parameters

Mohamed, Mokhtar and Yan, Xinggang and Mao, Zehui and Jiang, Bin (2017) Adaptive observer design for a class of nonlinear interconnected systems with uncertain time varying parameters. In: IFAC-PapersOnLine. Elsevier pp. 1421-1426. (doi:https://doi.org/10.1016/j.ifacol.2017.08.284) (Full text available)

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https://doi.org/10.1016/j.ifacol.2017.08.284

Abstract

In this paper, a class of nonlinear interconnected systems with uncertain time varying parameters is considered, in which both the interconnections and the isolated subsystems are nonlinear. The di?erence between the unknown time varying parameter and its corresponding nominal value is assumed to be bounded where the nominal value is not required to be known. A dynamical system is proposed and then, the error systems between the original interconnected system and the designed dynamical systems are analysed based on the Lyapunov direct method. A set of conditions is developed such that the augmented systems formed by the error dynamical systems and the designed adaptive laws, are globally uniformly bounded. Speci?cally, the estimation errors are asymptotically convergent to zero using LaSalle-Yoshizawa Theorem. Case study on a coupled inverted pendulum system is presented to demonstrate the developed methodology, and simulation shows that the proposed approach is e?ective and practicable.

Item Type: Conference or workshop item (Paper)
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Xinggang Yan
Date Deposited: 19 May 2017 10:14 UTC
Last Modified: 16 Aug 2018 10:09 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/61783 (The current URI for this page, for reference purposes)
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