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    Stabilization and PID tuning algorithms for second-order unstable processes with time-delays

    Access Status
    Fulltext not available
    Authors
    Seer, Q.
    Nandong, Jobrun
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Seer, Q. and Nandong, J. 2017. Stabilization and PID tuning algorithms for second-order unstable processes with time-delays. ISA Transactions. 67: pp. 233-245.
    Source Title
    ISA Transactions
    DOI
    10.1016/j.isatra.2017.01.017
    ISSN
    0019-0578
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/71634
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Open-loop unstable systems with time-delays are often encountered in process industry, which are often more difficult to control than stable processes. In this paper, the stabilization by PID controller of second-order unstable processes, which can be represented as second-order deadtime with an unstable pole (SODUP) and second-order deadtime with two unstable poles (SODTUP), is performed via the necessary and sufficient criteria of Routh-Hurwitz stability analysis. The stability analysis provides improved understanding on the existence of a stabilizing range of each PID parameter. Three simple PID tuning algorithms are proposed to provide desired closed-loop performance-robustness within the stable regions of controller parameters obtained via the stability analysis. The proposed PID controllers show improved performance over those derived via some existing methods.

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