摘要

In order to extract simple and certain diagnostic rules for wear pattern recognition of diesel engine from incomplete data, a method is proposed to directly extract decision rules for fault diagnosis. After defining the discernibility matrix primitive, the definition of object-oriented discernibility matrix in incomplete decision table for fault diagnosis is also proposed. Using these concepts, the object-oriented discernibility function is constructed. With the basic equivalent forms in proposition logic such as distribution laws, absorption laws, a method is proposed to compute the minimal object-oriented reductions. With the method, the diagnostic decision rules are successfully extracted for engine wear pattern from incomplete data so that the simple and certain rule set is obtained.

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