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Measurement noise filtering for PID controllers

Författare

Summary, in English

Measurement noise can generate undesired control activity resulting in wear of actuators and reduced performance. The effects of measurement noise can be alleviated by filtering the measurement signal.The design of the filter is then a trade-off; heavy filtering reduces the undesired control activity but performance is degraded. In this paper we discuss the trade-offs for PID control. Based on the insight gained we introduce two quantities that characterize the effect of measurement noise the SDU, which is a measure of noise activity analog to the IAE commonly used to characterize load disturbance response,and the noise gain kn, which tells how fluctuations in the filtered measurement signal are reflected in variations of the control signal. Simple rules for choosing the filter time constant for PI and PID controllers are also given. The results are illustrated by simulations and lab experiments.

Publiceringsår

2014

Språk

Engelska

Sidor

299-313

Publikation/Tidskrift/Serie

Journal of Process Control

Volym

24

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Control Engineering

Nyckelord

  • Measurement noise
  • Filtering
  • Trade-offs
  • Robustness
  • Performance
  • Noise gain
  • Sampling
  • PID control

Status

Published

Projekt

  • PID Control
  • LCCC
  • PICLU

Forskningsgrupp

  • LCCC

ISBN/ISSN/Övrigt

  • ISSN: 1873-2771