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Performance comparison between PID and dead-time compensating controllers

Publiceringsår: 2002
Språk: Engelska
Sidor: 887-895
Publikation/Tidskrift/Serie: Journal of Process Control
Volym: 12
Nummer: 8
Dokumenttyp: Artikel
Förlag: Elsevier


This paper is intended to answer the question: “When is a simple dead-time compensator expected to perform better than a PID?”. The performance criterion used is the integrated absolute error (IAE). It is compared for PI and PID controllers and a simple dead-time compensator (DTC) when a step load disturbance is applied at the plant input. Both stable and integrating processes are considered. For a fair comparison the controllers should provide equal robustness in some sense. Here, as a measure of robustness, the maximum of the absolute value of the sensitivity function is used. Since this is not a sufficient measure of robustness when errors in the dead time are considered, performance of the DTC's is given also as a function of dead-time margin (DM) where appropriate.



  • Technology and Engineering
  • PID control
  • Dead-time compensators
  • Performance comparison


  • ISSN: 0959-1524

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