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1. A few reminders
1.1 Diagnosis of discrete-event systems
A system is likely to evolve between normal and faulty operating modes. A faulty operating mode is reached when a fault occurs.
Fault diagnosis is defined as the operation used to detect a fault, locate its origin and, if necessary, determine its causes.
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Methodology
Diagnosis involves comparing instantaneous information from the system with a reference, or model, representing normal and/or faulty operation.
This reference is built using a priori knowledge of the system's operation. When this knowledge is sufficient to build a mathematical or analytical model...
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A few reminders
Two types of model for decentralized SED diagnosis
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