Control of a batch reactor using constrained direct inverse

László Richárd Tóth, Lajos Nagy, F. Szeifert

Research output: Contribution to journalArticle

Abstract

In this work the inverse model based temperature control of a batch chemical reactor is presented. The controller combines feed-forward and feedback elements. The feed-forward part is the constrained direct inverse, while multiple feedback structures are studied. Since we have a model with good correspondence with the physical system, the inverse of it can produce the manipulated variable. The feedback is needed to eliminate the effect of modeling errors that is especially important in steady-state. For the compensation of modeling error the following channels can be used: the manipulated variable, the set-point and the model parameters. The difference between each channel is how direct they act, and how fast can the consequences of manipulation be seen. These channels do not exclude each other, usually a faster feedback and a slower adaptation is applied where the control problem requires it. The example on which the controller strategies are presented is a 1 liter batch chemical reactor. The reactor has duplicated wall, and a laboratory thermostat supplies cooling/heating medium that flows through on the jacket of the reactor. The manipulated variable is the set-point of the thermostat, and the controlled variable is the inner temperature of the reactor. Simulation experiments support that the developed controller strategy is superior to conventional feedback loops, as it contains handling of measured disturbances, manipulator constraints, dead time and nonlinearity.

Original languageEnglish
Pages (from-to)967-972
Number of pages6
JournalComputer Aided Chemical Engineering
Volume32
DOIs
Publication statusPublished - 2013

Fingerprint

Batch reactors
Feedback
Thermostats
Chemical reactors
Controllers
Temperature control
Manipulators
Cooling
Heating
Experiments
Temperature

Keywords

  • Batch reactor
  • Control
  • Inverse control
  • Model based control

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

Cite this

Control of a batch reactor using constrained direct inverse. / Tóth, László Richárd; Nagy, Lajos; Szeifert, F.

In: Computer Aided Chemical Engineering, Vol. 32, 2013, p. 967-972.

Research output: Contribution to journalArticle

Tóth, László Richárd ; Nagy, Lajos ; Szeifert, F. / Control of a batch reactor using constrained direct inverse. In: Computer Aided Chemical Engineering. 2013 ; Vol. 32. pp. 967-972.
@article{0c0359868cff4c27a7f2ec7737a07b01,
title = "Control of a batch reactor using constrained direct inverse",
abstract = "In this work the inverse model based temperature control of a batch chemical reactor is presented. The controller combines feed-forward and feedback elements. The feed-forward part is the constrained direct inverse, while multiple feedback structures are studied. Since we have a model with good correspondence with the physical system, the inverse of it can produce the manipulated variable. The feedback is needed to eliminate the effect of modeling errors that is especially important in steady-state. For the compensation of modeling error the following channels can be used: the manipulated variable, the set-point and the model parameters. The difference between each channel is how direct they act, and how fast can the consequences of manipulation be seen. These channels do not exclude each other, usually a faster feedback and a slower adaptation is applied where the control problem requires it. The example on which the controller strategies are presented is a 1 liter batch chemical reactor. The reactor has duplicated wall, and a laboratory thermostat supplies cooling/heating medium that flows through on the jacket of the reactor. The manipulated variable is the set-point of the thermostat, and the controlled variable is the inner temperature of the reactor. Simulation experiments support that the developed controller strategy is superior to conventional feedback loops, as it contains handling of measured disturbances, manipulator constraints, dead time and nonlinearity.",
keywords = "Batch reactor, Control, Inverse control, Model based control",
author = "T{\'o}th, {L{\'a}szl{\'o} Rich{\'a}rd} and Lajos Nagy and F. Szeifert",
year = "2013",
doi = "10.1016/B978-0-444-63234-0.50162-7",
language = "English",
volume = "32",
pages = "967--972",
journal = "Computer Aided Chemical Engineering",
issn = "1570-7946",
publisher = "Elsevier",

}

TY - JOUR

T1 - Control of a batch reactor using constrained direct inverse

AU - Tóth, László Richárd

AU - Nagy, Lajos

AU - Szeifert, F.

PY - 2013

Y1 - 2013

N2 - In this work the inverse model based temperature control of a batch chemical reactor is presented. The controller combines feed-forward and feedback elements. The feed-forward part is the constrained direct inverse, while multiple feedback structures are studied. Since we have a model with good correspondence with the physical system, the inverse of it can produce the manipulated variable. The feedback is needed to eliminate the effect of modeling errors that is especially important in steady-state. For the compensation of modeling error the following channels can be used: the manipulated variable, the set-point and the model parameters. The difference between each channel is how direct they act, and how fast can the consequences of manipulation be seen. These channels do not exclude each other, usually a faster feedback and a slower adaptation is applied where the control problem requires it. The example on which the controller strategies are presented is a 1 liter batch chemical reactor. The reactor has duplicated wall, and a laboratory thermostat supplies cooling/heating medium that flows through on the jacket of the reactor. The manipulated variable is the set-point of the thermostat, and the controlled variable is the inner temperature of the reactor. Simulation experiments support that the developed controller strategy is superior to conventional feedback loops, as it contains handling of measured disturbances, manipulator constraints, dead time and nonlinearity.

AB - In this work the inverse model based temperature control of a batch chemical reactor is presented. The controller combines feed-forward and feedback elements. The feed-forward part is the constrained direct inverse, while multiple feedback structures are studied. Since we have a model with good correspondence with the physical system, the inverse of it can produce the manipulated variable. The feedback is needed to eliminate the effect of modeling errors that is especially important in steady-state. For the compensation of modeling error the following channels can be used: the manipulated variable, the set-point and the model parameters. The difference between each channel is how direct they act, and how fast can the consequences of manipulation be seen. These channels do not exclude each other, usually a faster feedback and a slower adaptation is applied where the control problem requires it. The example on which the controller strategies are presented is a 1 liter batch chemical reactor. The reactor has duplicated wall, and a laboratory thermostat supplies cooling/heating medium that flows through on the jacket of the reactor. The manipulated variable is the set-point of the thermostat, and the controlled variable is the inner temperature of the reactor. Simulation experiments support that the developed controller strategy is superior to conventional feedback loops, as it contains handling of measured disturbances, manipulator constraints, dead time and nonlinearity.

KW - Batch reactor

KW - Control

KW - Inverse control

KW - Model based control

UR - http://www.scopus.com/inward/record.url?scp=84879019220&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879019220&partnerID=8YFLogxK

U2 - 10.1016/B978-0-444-63234-0.50162-7

DO - 10.1016/B978-0-444-63234-0.50162-7

M3 - Article

VL - 32

SP - 967

EP - 972

JO - Computer Aided Chemical Engineering

JF - Computer Aided Chemical Engineering

SN - 1570-7946

ER -