Half order plus time delay (HOPTD) models to tune PI controllers

Jietae Lee, Yongjeh Lee, Dae Ryook Yang, Thomas F. Edgar

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Methods based on the first-order plus time delay (FOPTD) model are very popular for tuning proportional-integral (PI) controllers. The FOPTD model-based methods are simple and their utility has been proved with many successful applications to a wide range of processes in practice. However, even for some overdamped processes where the FOPTD model seems to be applied successfully, these empirical FOPTD model-based methods can fail to provide stable tuning results. To remove these drawbacks, a PI controller tuning method based on half-order plus time delay (HOPTD) model is proposed. Because FOPTD model-based methods can be applied to higher order processes, the proposed HOPTD model-based method can be applied to higher order processes as well. It does not require any additional process information compared to the FOPTD model-based method and hence can be used for overdamped processes in practice, complementing the traditional FOPTD model-based methods.

Original languageEnglish
Pages (from-to)601-609
Number of pages9
JournalAICHE Journal
Volume63
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1

Keywords

  • first-order plus time delay model
  • half-order plus time delay model
  • proportional integral control
  • step response
  • tuning

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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