Possibility theory in "Fault mode effect analyses". A satellite fault diagnosis application

• Published in: Proceedings of 1994 IEEE 3rd International Fuzzy Systems Conference pp. 1176 - 1181 vol.2
• Main Authors: Cayrac, D., Dubois, D., Haziza, M., Prade, H.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1994
• Subjects: Application software; Control systems; Costs; Fault diagnosis; Monitoring; Possibility theory; Satellites; Software engineering; Telemetry; Uncertainty
• ISBN: 078031896X; 9780780318960
• DOI: 10.1109/FUZZY.1994.343901

Matra Marconi Space (MMS) has been developing spacecraft diagnostic support systems for eight years. Keeping in mind the operational constraints of scale and efficiency that guided the design of the first systems, the reasoning paradigms are now refined, in order to improve the solutions. The FMECA, Fault Mode Effects and Criticality Analyses, form a very important category of knowledge compiled during the design phase of a satellite, and used also for diagnosis activities. This paper proposes their extension, allowing a finer representation of the available knowledge, at approximately the same cost, through the introduction of an appropriate representation of uncertainty and incompleteness based on possibility theory. Efficient discriminization techniques exploiting uncertain observations are introduced, and an example illustrates the mechanisms involved in this approach.< >