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Performance comparison between PID and dead-time compensating controllers

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Author

Summary, in English

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.

Publishing year

2002

Language

English

Pages

887-895

Publication/Series

Journal of Process Control

Volume

12

Issue

8

Document type

Journal article

Publisher

Elsevier

Topic

  • Control Engineering

Keywords

  • PID control
  • Dead-time compensators
  • Performance comparison

Status

Published

ISBN/ISSN/Other

  • ISSN: 1873-2771