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Modelling and Simulation of an Industrial Control Loop with Friction

Eborn, Jonas (1994) In MSc Theses
Department of Automatic Control
Abstract
Modelling of an industrial control loop for concentration control using Omola, an object-oriented modelling language, is described. The major modelling effort has been made to make a complete nonlinear model of the pneumatic positioner-actuator of the control valve in the loop. A library of several friction models has also been developed. These models have been used to describe friction in the control valve. The different friction models have been compared to each other and the effects of various frictional phenomena on the control loop behaviour have been studied. The control loop has been simulated using the OmSim working environment. The simulations show that concentration variations observed during operation of the control loop at a... (More)
Modelling of an industrial control loop for concentration control using Omola, an object-oriented modelling language, is described. The major modelling effort has been made to make a complete nonlinear model of the pneumatic positioner-actuator of the control valve in the loop. A library of several friction models has also been developed. These models have been used to describe friction in the control valve. The different friction models have been compared to each other and the effects of various frictional phenomena on the control loop behaviour have been studied. The control loop has been simulated using the OmSim working environment. The simulations show that concentration variations observed during operation of the control loop at a paper mill can be caused by friction alone. Possible measures to overcome the control valve problem are studied and a simple way of reducing the problem is proposed. (Less)
Please use this url to cite or link to this publication:
author
Eborn, Jonas
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
friction, modelling, simulation, control valve, process control, pneumatic
publication/series
MSc Theses
report number
TFRT-5501
ISSN
0280-5316
language
English
id
8848898
date added to LUP
2016-03-25 12:12:51
date last changed
2016-03-25 12:12:51
@misc{8848898,
  abstract     = {Modelling of an industrial control loop for concentration control using Omola, an object-oriented modelling language, is described. The major modelling effort has been made to make a complete nonlinear model of the pneumatic positioner-actuator of the control valve in the loop. A library of several friction models has also been developed. These models have been used to describe friction in the control valve. The different friction models have been compared to each other and the effects of various frictional phenomena on the control loop behaviour have been studied. The control loop has been simulated using the OmSim working environment. The simulations show that concentration variations observed during operation of the control loop at a paper mill can be caused by friction alone. Possible measures to overcome the control valve problem are studied and a simple way of reducing the problem is proposed.},
  author       = {Eborn, Jonas},
  issn         = {0280-5316},
  keyword      = {friction,modelling,simulation,control valve,process control,pneumatic},
  language     = {eng},
  note         = {Student Paper},
  series       = {MSc Theses},
  title        = {Modelling and Simulation of an Industrial Control Loop with Friction},
  year         = {1994},
}