Auto-tuning cascade loops subject to saturation

Auto-tuning of outer-loop (master) controllers for cascade feedback loops runs into considerable problems if the inner-loop (slave) controller is liable to saturate. We explain how these problems arise, and propose a modified auto-tuning procedure to overcome these problems. Two enhancements of the...

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Bibliographic Details
Published inIFAC Proceedings Volumes Vol. 43; no. 10; pp. 191 - 195
Main Authors Butt, A.S., Maciejowski, J.M., McNaughton, H.M.
Format Journal Article
LanguageEnglish
Published 2010
Subjects
Autotuners
cascade control
learning control
saturation
saturation
learning control
Autotuners
cascade control
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ISSN1474-6670
DOI10.3182/20100826-3-TR-4015.00037

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Summary:Auto-tuning of outer-loop (master) controllers for cascade feedback loops runs into considerable problems if the inner-loop (slave) controller is liable to saturate. We explain how these problems arise, and propose a modified auto-tuning procedure to overcome these problems. Two enhancements of the inner-loop controller are proposed, which prevent this controller from saturating, and a correspondingly modified method of analysing the resulting data and determining PID controller parameters is presented. The efficacy of these proposals is illustrated on a realistic example.
ISSN:1474-6670
DOI:10.3182/20100826-3-TR-4015.00037