Article (Scientific journals)
A Sparse Estimation Approach to Fault Isolation
Borguet, Sébastien; Léonard, Olivier
2010In Journal of Engineering for Gas Turbines and Power, 132 (2), p. 021601-1 021601-7
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Keywords :
gas-path analysis; fault isolation; sparse estimation
Abstract :
[en] Least-squares-based methods are very popular in the jet engine community for health monitoring purposes. In most practical situations, the number of health parameters exceeds the number of measurements, making the estimation problem underdetermined. To address this issue, regularization adds a penalty term on the deviations of the health parameters. Generally, this term imposes a quadratic penalization on these deviations. A side effect of this technique is a relatively poor isolation capability. The latter feature can be improved by recognizing that abrupt faults impact at most one or two component(s) simultaneously. This translates mathematically into the search for a sparse solution. The present contribution reports the development of a fault isolation tool favoring sparse solutions. It is very efficiently implemented in the form of a quadratic program. As a validation procedure, the resulting algorithm is applied to a variety of fault conditions simulated with a generic commercial turbofan model.
Disciplines :
Energy
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 :
A Sparse Estimation Approach to Fault Isolation
Publication date :
February 2010
Journal title :
Journal of Engineering for Gas Turbines and Power
ISSN :
0742-4795
eISSN :
1528-8919
Publisher :
American Society of Mechanical Engineers, New York, United States - New York
Volume :
132
Issue :
2
Pages :
021601-1 021601-7
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 November 2009

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