The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Derivative backoff: The other saturation problem for PID controllers

På svenska

Author

Summary, in English

tThe PID controller is by far the most common controller, and to ensure good behavior under all circumstances, a PID implementation must consider many practical aspects such as integrator windup,derivative kick, and bumpless parameter and mode changes. In this paper, an entirely new issue for the derivative part is introduced and has been named derivative backoff. It occurs when the process value measurement saturates and is a general issue that affects all PID implementations. Derivative backoff is described in detail and it is shown that it can cause considerable, undesired, effects on industrially relevant processes even when they are controlled by well-tuned PID controllers. An anti-backoff strategy for PID controllers with integral action is proposed and evaluated, and a simple patch for existing PID implementations is presented. Possible strategies for PID controllers without integral action are also discussed.

Publishing year

2015

Language

English

Pages

155-160

Publication/Series

Journal of Process Control

Volume

33

Document type

Journal article

Publisher

Elsevier

Topic

  • Other Engineering and Technologies

Keywords

  • Control algorithms
  • Derivative action
  • PID control
  • PID controllers
  • Derivative backoff

Status

Published

Project

  • PID Control
  • LCCC
  • PICLU

Research group

  • LCCC

ISBN/ISSN/Other

  • ISSN: 1873-2771