Method of fault diagnosis in an apparatus having sensors
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United States of America Patent
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May 9, 1995
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N/A
app pub date -
Oct 23, 1992
filing date -
Oct 25, 1991
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Abstract
The relationships between part nodes, including all sensor nodes in an apparatus system are expressed by connecting relations and weighing factors indicating the correlation. Output signals of all the sensor nodes in the system are converted to a state quantity by a membership function using fuzzy reasoning. With a sensor as a starting point, the nodes which are sequentially connected are traced and state quantities of each node are determined. The state quantities of each node are unified in a subsystem comprising this apparatus system and the subsystem in which the value of the state quantity is large is inferred to be faulty.
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