Closed-Loop Time Delay Estimation of SISO Processes for Control Performance Monitoring

Christopher A. HARRISON, S. Joe QIN*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

1 Citation (Scopus)


A novel time delay estimation method for SISO control loop monitoring has been introduced. The proposed method requires a process regulated by a SISO controller during routine operation to be temporarily switched to relay control. The input and output data gathered from the process under relay control can be used to produce a time delay estimate.
Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalIFAC Proceedings Volumes
Issue number9
Publication statusPublished - Jul 2004
Externally publishedYes
Event7th IFAC Symposium on Dynamics and Control of Process Systems, DYCOPS 2004 - Cambridge, United States
Duration: 5 Jul 20047 Jul 2004

Bibliographical note

Financial support from the National Science Foundation Graduate Research Fellowship Program and the National Defense Science and Engineering Fellowship Program is gratefully acknowledged.


  • Closed-loop
  • Performance monitoring
  • SISO process
  • Time delay estimation


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