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An Industrial Adaptive PID Controller

Åström, Karl Johan LU and Hägglund, Tore LU (1990) IFAC Symposium on Adaptive Control and Signal Processing 1989 In Adaptive Systems in Control and Signal Processing p.251-256
Abstract
This paper presents a new industrial adaptive PID controller. The controller has the PID structure, with dual rate sampling, which means that the sampling rate for the PID controller is significantly higher than the sampling rate in the parameter estimator. The controller differs from conventional parametric adaptive controllers because it is based on estimation of transfer function properties. For normal industrial process control the adaptive controller can be used without any prior information about the process dynamics, such as sampling period, closed loop pole assignments etc. This is achieved by using a relay auto-tuner to initialize the controller. The auto-tuner determines a point on the Nyquist curve where the phaselag is close to... (More)
This paper presents a new industrial adaptive PID controller. The controller has the PID structure, with dual rate sampling, which means that the sampling rate for the PID controller is significantly higher than the sampling rate in the parameter estimator. The controller differs from conventional parametric adaptive controllers because it is based on estimation of transfer function properties. For normal industrial process control the adaptive controller can be used without any prior information about the process dynamics, such as sampling period, closed loop pole assignments etc. This is achieved by using a relay auto-tuner to initialize the controller. The auto-tuner determines a point on the Nyquist curve where the phaselag is close to 180°. This point on the Nyquist curve is then tracked by the parameter estimator. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Adaptive Systems in Control and Signal Processing
pages
251 - 256
conference name
IFAC Symposium on Adaptive Control and Signal Processing 1989
DOI
10.1016/B978-0-08-035727-0.50048-2
language
English
LU publication?
yes
id
91366fbb-983d-4789-840c-4da44f5dadbf (old id 8517672)
date added to LUP
2016-01-15 10:55:58
date last changed
2016-08-02 13:51:42
@misc{91366fbb-983d-4789-840c-4da44f5dadbf,
  abstract     = {This paper presents a new industrial adaptive PID controller. The controller has the PID structure, with dual rate sampling, which means that the sampling rate for the PID controller is significantly higher than the sampling rate in the parameter estimator. The controller differs from conventional parametric adaptive controllers because it is based on estimation of transfer function properties. For normal industrial process control the adaptive controller can be used without any prior information about the process dynamics, such as sampling period, closed loop pole assignments etc. This is achieved by using a relay auto-tuner to initialize the controller. The auto-tuner determines a point on the Nyquist curve where the phaselag is close to 180°. This point on the Nyquist curve is then tracked by the parameter estimator.},
  author       = {Åström, Karl Johan and Hägglund, Tore},
  language     = {eng},
  pages        = {251--256},
  series       = {Adaptive Systems in Control and Signal Processing},
  title        = {An Industrial Adaptive PID Controller},
  url          = {http://dx.doi.org/10.1016/B978-0-08-035727-0.50048-2},
  year         = {1990},
}