A new Sliding Mode Control tuning approach for second-order inverse-response plus variable dead time processes

Duby Castellanos-Cárdenas, Fabio Castrillón, Rafael E. Vásquez, Norha L. Posada, Oscar Camacho

    Research output: Contribution to journalArticle in an indexed scientific journalpeer-review

    16 Scopus citations

    Abstract

    This work addresses a new set of tuning rules for Sliding Mode Control (SMC) applied to second-order inverse-response plus variable dead time processes. Descriptions of the dynamics of inverse response systems and sliding-mode controllers are first provided. Then, we present the design process for the set of SMC tuning rules, using dimensional analysis, experimental design, optimization, and model reduction techniques for set-point tracking. The obtained expressions are simple, which eases the application of the proposed step-by-step systematic methodology. The performance and robustness of the proposed SMC tuning method are compared to other well-known controllers, and then applied to a Van de Vusse isothermal reactor, which is a complex nonlinear second-order inverse-response system that exhibits variable dead time. The performance achieved with the new SMC tuning method is good for set-point tracking, while exhibiting a good behavior for disturbance rejection, and can be applied considering a wide-range of parameters of the process’ transfer function.

    Original languageEnglish
    Pages (from-to)77-88
    Number of pages12
    JournalJournal of Process Control
    Volume115
    DOIs
    StatePublished - Jul 2022

    Bibliographical note

    Publisher Copyright:
    © 2022 The Author(s)

    Keywords

    • Controller tuning
    • Dead-time
    • Non-minimum phase systems
    • Process control
    • Sliding Mode Control law

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