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Fractional - order models of time delay systems using Walsh operational matrices

Kothari, Kajal and Mehta, Utkal V. and Vanualailai, Jito (2018) Fractional - order models of time delay systems using Walsh operational matrices. [Conference Proceedings]

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    Abstract

    Fractional-order modeling is recently attracting the attention of researchers in many disciplines of science and engineering. In this paper, a simplified way to identify systems is proposed using Walsh functions. The complex procedure for system approximation in fractional-order domain has been reduced by converting the complex fractional calculus equations into simple algebra and therefore it allows the estimation of the implicit time-delay in the system together with other model parameters. The orthogonal Walsh operational matrix is employed for the assessment of the unknown system transfer function. The presented method does not require any prior knowledge of the transfer function structure or partial information about fractional differentiation order and facilitates low order model using time response data without and with considering the influence of noise. Numerical analysis and practical study on DC motor speed control system show the efficacy of the presented approach without additional filtering or signal smoothing and an extensive computation burden.

    Item Type: Conference Proceedings
    Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > Robotics and Automation
    Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Engineering and Physics
    Depositing User: Utkal Mehta
    Date Deposited: 12 Mar 2019 15:55
    Last Modified: 12 Mar 2019 15:55
    URI: http://repository.usp.ac.fj/id/eprint/11261
    UNSPECIFIED

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