On the use of diagonal control versus decoupling for ill-conditioned processes

We argue that ill-conditioned processes do not necessarily preclude the use of decoupling control. This applies also if the process is ill-conditioned in the crossover frequency range of a diagonal controller. Therefore the rule that one should never use a decoupler for ill-conditioned plants is mis...

Full description

Saved in:
Bibliographic Details
Published inAutomatica (Oxford) Vol. 33; no. 3; pp. 427 - 432
Main Authors Gjøsæter, Ole B., Foss, Bjarne A.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.03.1997
Elsevier
Subjects
Applied sciences
Computer science; control theory; systems
Control system synthesis
Control theory. Systems
decoupling
diagonal control
distillation columns
Exact sciences and technology
Ill-conditioning
Ill-conditioning
distillation columns
decoupling
diagonal control
Frequency domain method
Decoupling
Multivariable control
Distillation column
Differential integral proportional regulator
Online AccessGet full text

Cover

More Information
Summary:We argue that ill-conditioned processes do not necessarily preclude the use of decoupling control. This applies also if the process is ill-conditioned in the crossover frequency range of a diagonal controller. Therefore the rule that one should never use a decoupler for ill-conditioned plants is misleading. The investigation is based on a discussion of the performance sensitivity of ill-conditioned systems and observations made from analyzing a semirealistic model of a distillation column.
ISSN:0005-1098
1873-2836
DOI:10.1016/S0005-1098(96)00170-7