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Performance assessment of level controllers
Author(s) -
Horton E. C.,
Foley M. W.,
Kwok K. E.
Publication year - 2003
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.771
Subject(s) - smoothing , controller (irrigation) , variance (accounting) , control theory (sociology) , variable (mathematics) , flow control (data) , computer science , control engineering , engineering , control (management) , mathematics , artificial intelligence , mathematical analysis , accounting , agronomy , business , computer vision , biology , computer network
A variety of techniques have been developed for the assessment of industrial control loops. These involve computation of an index which compares some measure of controlled variable performance (e.g. variance of distillate impurity) to the best achievable. Such methods are generally not suitable for the assessment of surge tank level controllers, for which the behaviour of the manipulated effluent flowrate is of greater concern. This paper introduces a flow smoothing performance index for the assessment of surge tank level loops against an averaging level control standard. Several control schemes were evaluated as potential flow smoothing benchmarks through application to simulated, pilot‐plant and industrial data sets. An optimal PI regulator was recommended as the default performance standard for industrial level control loops. A novel feature of this assessment technique is that it not only measures the performance of the installed controller, but also specifies new settings for the PI tuning parameters. Copyright © 2003 John Wiley & Sons, Ltd.