Stabilization of second-order unstable delay processes by PID controllers

Qing Guo Wang, Xiang Cheng, Xiang Lu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


Based on the well known Nyquist stability criterion, the stabilization of second-order unstable time-delay processes by PID controllers is investigated. Explicit stabilizability results in terms of the upper limit of time-delay size is established. The analysis not only provides both theoretical understanding on such stabilization issue, but also meaningful for the teaching of Nyquist stability criterion in control eduction.

Original languageEnglish
Title of host publication7th IFAC Symposium on Advances in Control Education, ACE 2006
PublisherIFAC Secretariat
Number of pages6
EditionPART 1
ISBN (Print)9783902661074
Publication statusPublished - 2006
Externally publishedYes

Publication series

NameIFAC Proceedings Volumes (IFAC-PapersOnline)
NumberPART 1
ISSN (Print)1474-6670


  • Nyquist plot
  • PID controller
  • Stabilization
  • Unstable time-delay processes

ASJC Scopus subject areas

  • Control and Systems Engineering


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