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Published Articles >> Table of Contents >> Abstract
November 1990 (Vol. 12, No. 11)
pp. 1115-1119
Fault Tree Based Diagnostics Using Fuzzy Logic
P. Gmytrasiewicz
J.A. Hassberger
J.C. Lee
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/34.61713
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| Abstract |
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Fuzzy set theory is investigated as a tool for the diagnostics of systems described by means of a fault tree. The objective is to diagnose component failures from the observation of fuzzy symptoms using the information contained in a fault tree. A two-step procedure is used to solve the problem. In this first step, causal reasoning is used to diagnose failure modes, consisting of minimal cut-sets of basic events, from the observation of triggered gates treated as symptoms. In the second step, the authors identify the particular components which have failed based on the diagnosed failure modes. To perform this second step, the solution of a fuzzy relational equation a= V-product (S/sup T/ alpha x) connecting failure mode a to basic events x is derived. With this method, the diagnostics equations can be symmetrically generated and solved in terms of the tree's basic events. The systematic nature with which a diagnosis can be generated from a fault tree lends this method to potential application of object-based programming techniques.
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 References
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 Additional Information
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Index Terms- fault tree based diagnostics; fuzzy logic; component failures; fuzzy symptoms; two-step procedure; causal reasoning; failure modes; minimal cut-sets; triggered gates; failure analysis; fuzzy logic
Citation:
P. Gmytrasiewicz, J.A. Hassberger, J.C. Lee,
"Fault Tree Based Diagnostics Using Fuzzy Logic,"
IEEE Transactions on Pattern Analysis and Machine Intelligence,
vol. 12,
no. 11,
pp. 1115-1119,
Nov.,
1990
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