On the Discretization of Fractional-Order Laplacian Operators

Reyad El-Khazali, Nabil Tawalbeh, Ali Al-Hayajneh

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    2 Scopus citations

    Abstract

    This work introduces two new discrete-time generating functions to discretize the fractional-order Laplacian integro-differential operators denoted by s ±α. The indirect discretization method is used for this purpose. The order of such functions is first or second-order ones, where both are stable and of nonminimum phase. Furthermore, as α1, both functions reduce to the well-known bilinear transformation. It will be shown via numerical example that the proposed functions are robust to the sampling rate, which becomes a test point for any new discrete-time generating function to be used for fractional-order system analysis and control. The stability property of the new functions makes them perfect candidates that can be used to fabricate practical fractional-order PID controllers. The main points of this work are verified via numerical simulations.

    Original languageBritish English
    Title of host publication2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages1113-1117
    Number of pages5
    ISBN (Electronic)9798350302103
    DOIs
    StatePublished - 2023
    Event2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023 - Tempe, United States
    Duration: 6 Aug 20239 Aug 2023

    Publication series

    NameMidwest Symposium on Circuits and Systems
    ISSN (Print)1548-3746

    Conference

    Conference2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023
    Country/TerritoryUnited States
    CityTempe
    Period6/08/239/08/23

    Keywords

    • Direct discretization
    • El-Khazali operators
    • fractional calculus Introduction
    • indirect discretization
    • Tustin approach

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