273documents trouvés
Fault diagnosability utilizing quasi-static and structural modelling
F.NEJJARI, R.PEREZ, T.ESCOBET, L.TRAVE-MASSUYES
Marrakech, UPC, Catalonia, DISCO
Revue Scientifique : Mathematical and Computer Modelling , Vol.45, N°5-6, pp.606-616, Mars 2007 , N° 06813
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Abstract
This paper presents a diagnosis model-based method to analyse fault discriminability and assess diagnosability. The technique is based on the state space representation of quasi-static models. Fault diagnosability characterises the faults that can be discriminated using the available sensors in a system. The method can be used to select the minimum set of sensors that guarantee discriminability of an anticipated set of faults. The approach is applied on a two-tanks system benchmark and is compared to a diagnosability analysis method based on structural analysis.
Mots-Clés / Keywords
Diagnosability; Quasi-static model; Structural analysis; FDI;
Timed fault diagnosis
L.TRAVE-MASSUYES, G.CALDERON-ESPINOZA
DISCO
Manifestation avec acte : 20th International Joint Conference on Artificial Intelligence (IJCAI'07), Hyderabad (Inde), 6-12 Janvier 2007, 9p. , N° 06780
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Abstract
Time has been shown to be determinant in many diagnosis situations. A way to account for time is to enrich the fault signature matrix with time information. However this requires to anticipate the symptoms occurrence order or provide estimates for the symptom occurrence dates. In this paper, we use the time information present in the behavior model of the system and automatically retrieve this information when a symptom occurs. A conflict-based approach allows us to generate the diagnoses. For this purpose, we extend the classical DX diagnosis generation algorithm based on hitting sets to deal with time and provide an incremental version. The algorithm takes as input time labelled conflicts that are obtained by checking the consistency of observations against a causal behavioral model including explicit time information. Our algorithm accounts automatically for time and outputs time labelled diagnoses that are updated in time. It is illustrated on a two tanks example including delays in which time aspects have a strong impact on diagnosis and fault discrimination.
Diagnosability analysis based on component supported analytical redundancy relations
L.TRAVE-MASSUYES, T.ESCOBET, S.SPANACHE, X.OLIVE
DISCO, Catalonia, UPC
Revue Scientifique : IEEE Transactions on Systems, Man and Cybernetics Part A, Vol.36, N°6, pp.1146-1160, Novembre 2006 , N° 04080
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108897Hybrid systems diagnosability from a discrete event abstraction of multimode parity space
M.BAYOUDH, L.TRAVE-MASSUYES, X.OLIVE
DISCO, ALCATEL ALENIA
Rapport LAAS N°06804, Novembre 2006, 8p.
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108589Model based thoughts CA-EN and TIGER then and now
L.TRAVE-MASSUYES
DISCO
Ouvrage (contribution) : ROB MILNE: a tribute to a pioneering al scientist, entrepreneur and mountaineer, IOS Press, Eds. A.Bundy, S.Wilson, N°ISBN 1-58603-639-4, 2006, pp.1-28 , N° 06660
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108026Projet AGATA. Rapport de synthèse sur l'activité : études et définitions de modèles
F.PY, F.PERROT, Y.PENCOLE, A.ORLANDINI, L.TRAVE-MASSUYES, F.INGRAND
RIA, DISCO, RIS
Rapport de Contrat : Contrat CNES, Septembre 2006, 47p. , N° 06547
Diffusion restreinte
107641Specification of diagnosis algorithms for web services. Phase 1
L.TRAVE-MASSUYES, A.SUBIAS, Y.PENCOLE, X.PUCEL
DISCO
Rapport de Contrat : Projet IST WS-DIAMOND N°516933, Septembre 2006, 35p. , N° 06872
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108922Définition d'un formalisme hybride pour l'étude de la diagnosticabilité des systèmes hybrides. Définition et conditions suffisantes de la diagnosticabilité
M.BAYOUDH, L.TRAVE-MASSUYES
DISCO
Rapport LAAS N°06675, Septembre 2006, 7p.
Non diffusable
108024Comparing diagnosability in CS and DES
L.TRAVE-MASSUYES, M.O.CORDIER, X.PUCEL
DISCO, IRISA
Manifestation avec acte : 6th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes (SAFEPROCESS'2006), Beijing (Chine), 30 Août - 1er Septembre 2006, pp.1231-1236 , N° 06070
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107601A discrete event model for situation awareness purposes
T.KEMPOWSKY, A.SUBIAS, J.AGUILAR MARTIN, L.TRAVE-MASSUYES
DISCO
Manifestation avec acte : 6th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes (SAFEPROCESS'2006), Beijing (Chine), 30 Août - 1er Septembre 2006, pp.1363-1368 , N° 06028
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