Controller tuning based on cross-over information

Eugene Boe, Shyh Hong Hwang, Hsueh Chia Chang

Research output: Contribution to journalArticlepeer-review


Several industrial tuning methods for the PID controller such as the Ziegler-Nichols method, are based on cross-over information-ultimate gain and cross-over frequency. We show here that these methods must fail for a class of systems that we have named resonant systems. For nonresonant systems, we also propose an improvement of the empirical Ziegler-Nichols method by carrying out a rigorous expansion of the leading poles about the cross-over point. Our results are conveniently summarized in graphical form for easy applications.

Original languageEnglish
Pages (from-to)359-369
Number of pages11
JournalJournal of the Chinese Institute of Chemical Engineers
Issue number6
Publication statusPublished - 1988 Nov

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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