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Derivative backoff: The other saturation problem for PID controllers

In English

Författare

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.

Publiceringsår

2015

Språk

Engelska

Sidor

155-160

Publikation/Tidskrift/Serie

Journal of Process Control

Volym

33

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Other Engineering and Technologies

Nyckelord

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

Status

Published

Projekt

  • PID Control
  • LCCC
  • PICLU

Forskningsgrupp

  • LCCC

ISBN/ISSN/Övrigt

  • ISSN: 1873-2771