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Permanent link (DOI): https://doi.org/10.7939/R3BM52

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Alarm limits, deadbands and chattering Open Access

Descriptions

Other title
Subject/Keyword
alarm management
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Naghoosi, Elham
Supervisor and department
Chen, Tongwen (Electrical Engineering)
Examining committee member and department
Zhao, Qing (Electrical Engineering)
Shah, Sirish (Chemical Engineering)
Department
Department of Electrical and Computer Engineering
Specialization

Date accepted
2011-04-15T16:59:57Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
Receiving false and nuisance alarms is a well known problem in industrial alarm systems. The main cause of this problem is poor alarm design which is the result of huge number of configured alarms and lack of automatic and analytical design methods. This study targets deriving analytical methods for designing alarm parameters such as alarm limits, alarm deadbands and delay timers. The relation between false and missed alarm rates along with chattering is investigated with alarm limits and deadbands. There are two equations presented to estimate the optimal alarm limit with respect to deadbands and statistical characteristics of the process data. Since reduction of alarm chattering is a primary goal in redesigning the alarm parameters, the analytical relation between chattering with alarm parameters and process data is also investigated. The alarm chattering index is derived as a mathematical function of alarm limits, deadbands, time delays and statistical characteristics of the process data.
Language
English
DOI
doi:10.7939/R3BM52
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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