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    Tuning and performance assessment of complex fractional-order PI controllers

    Access Status
    Fulltext not available
    Authors
    Moghadam, M.
    Padula, Fabrizio
    Ntogramatzidis, Lorenzo
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Moghadam, M. and Padula, F. and Ntogramatzidis, L. 2018. Tuning and performance assessment of complex fractional-order PI controllers. IFAC-PapersOnLine. 51 (4): pp. 757-762.
    Source Title
    IFAC-PapersOnLine
    DOI
    10.1016/j.ifacol.2018.06.205
    ISSN
    2405-8963
    School
    School of Electrical Engineering, Computing and Mathematical Science (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP160104994
    URI
    http://hdl.handle.net/20.500.11937/70026
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, we propose an optimization-based tuning methodology for real and complex Fractional-Order Proportional-Integral (FOPI) controllers. The proposed approach hinges on a modified version of the Integral Absolute Error (IAE) sensitivity-constrained optimization problem, which is suitably adapted to the design of fractional controllers. As such, it allows the exploitation of the potentiality of the (possibly complex) fractional integrator. We also propose a method, based on the well-known CRONE approximation, which delivers a band-limited real-rational approximation of the real part of the complex-order integrator. Finally, based on a First-Order-Plus-Dead-Time (FOPDT) model of the process, we use our design and approximation techniques to find an optimal tuning for real, complex fractional-order, and integer PI controllers and we provide a quantitative performance assessment.

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