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Constrained sparse estimation for improved fault isolation
Borguet, Sébastien; Léonard, Olivier
2011In Proceedings of ASME Turbo Expo 2011
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Keywords :
gas path analysis; fault isolation; quadratic programming; constrained estimation
Abstract :
[en] Least-squares-based methods are very popular in the jet engine community for health monitoring purpose. Their isolation capability can be improved by using a prior knowledge on the health parameters that better matches the expected pattern of the solution i.e., a sparse one as accidental faults impact at most one or two component(s) simultaneously. On the other hand, complimentary information about the feasible values of the health parameters can be derived in the form of constraints. The present contribution investigates the effect of the addition of such constraints on the performance of the sparse estimation tool. Due to its quadratic programming formulation, the constraints are integrated in a straightforward manner. Results obtained on a variety of fault conditions simulated with a commercial turbofan model show that the inclusion of constraints further enhance the isolation capability of the sparse estimator. In particular, the constraints help resolve a confusion issue between high pressure compressor and variable stator vanes faults.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Borguet, Sébastien ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Turbomachines et propulsion aérospatiale
Léonard, Olivier ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Turbomachines et propulsion aérospatiale
Language :
English
Title :
Constrained sparse estimation for improved fault isolation
Publication date :
2011
Event name :
ASME Turbo Expo
Event organizer :
International Gas Turbine Institute
Event place :
Vancouver, Canada
Event date :
June 6-10 2011
Audience :
International
Main work title :
Proceedings of ASME Turbo Expo 2011
Peer reviewed :
Peer reviewed
Commentary :
Paper GT2011-45711
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since 14 March 2011

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