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The Tracking Ratio Station

Hägglund, Tore LU (2017) In Control Engineering Practice 69. p.122-130
Abstract
In ratio control, the control objective is to keep the ratio between two signals, normally flow measurements, at a desired value in spite of variations in setpoints and load disturbances, and possible control signal saturations. This paper presents a new ratio control scheme, the Tracking Ratio Station, that manages to handle all these situations. It is also able to keep the ratio when one of the controllers takes a local setpoint or is switched to manual control. The Tracking Ratio Station determines the setpoints of the two flow loops so that the one with the largest control error follows the external setpoint, whereas the one with the smallest control error follows the process output of the opposite control loop. The paper illustrates... (More)
In ratio control, the control objective is to keep the ratio between two signals, normally flow measurements, at a desired value in spite of variations in setpoints and load disturbances, and possible control signal saturations. This paper presents a new ratio control scheme, the Tracking Ratio Station, that manages to handle all these situations. It is also able to keep the ratio when one of the controllers takes a local setpoint or is switched to manual control. The Tracking Ratio Station determines the setpoints of the two flow loops so that the one with the largest control error follows the external setpoint, whereas the one with the smallest control error follows the process output of the opposite control loop. The paper illustrates the properties of the Tracking Ratio Station in terms of both simulations and industrial field tests. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ratio control, Ratio Station, Blending, In-line blending, Mixing, Process control, Tracking Ratio Station
in
Control Engineering Practice
volume
69
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85030701439
  • wos:000414109400011
ISSN
0967-0661
DOI
10.1016/j.conengprac.2017.09.016
language
English
LU publication?
yes
id
e26fe504-60ff-4eae-80c1-9ff2b0e6dec2
date added to LUP
2017-10-13 13:33:38
date last changed
2018-01-16 13:22:56
@article{e26fe504-60ff-4eae-80c1-9ff2b0e6dec2,
  abstract     = {In ratio control, the control objective is to keep the ratio between two signals, normally flow measurements, at a desired value in spite of variations in setpoints and load disturbances, and possible control signal saturations. This paper presents a new ratio control scheme, the Tracking Ratio Station, that manages to handle all these situations. It is also able to keep the ratio when one of the controllers takes a local setpoint or is switched to manual control. The Tracking Ratio Station determines the setpoints of the two flow loops so that the one with the largest control error follows the external setpoint, whereas the one with the smallest control error follows the process output of the opposite control loop. The paper illustrates the properties of the Tracking Ratio Station in terms of both simulations and industrial field tests.},
  author       = {Hägglund, Tore},
  issn         = {0967-0661},
  keyword      = {Ratio control, Ratio Station, Blending, In-line blending, Mixing, Process control, Tracking Ratio Station},
  language     = {eng},
  pages        = {122--130},
  publisher    = {Elsevier},
  series       = {Control Engineering Practice},
  title        = {The Tracking Ratio Station},
  url          = {http://dx.doi.org/10.1016/j.conengprac.2017.09.016},
  volume       = {69},
  year         = {2017},
}