Fault diagnosis expert system

Details Fault diagnosis expert system Fault diagnosis expert system

1990-09-19

1992-06-30

Atkinson, Charles E.

Excavating

3642763, 364DIG1, 395575, 395916, G06F 1100, G01R 3128

Patent

active

051270056

ABSTRACT:
A fault diagnosis expert system for locating and eliminating sources of a machine trouble. The system comprises a storage part for storing an expert knowledge constructed in a hierarchical search tree structure in which cause-to-effect links connecting high-level effect events to low-level cause events are pre-defined and all possible low-level cause events are pre-enumerated for each high-level effect event, a user interface part for providing a user with questions and responses regarding the state of the machine trouble, an inference part for inferring a cause of the machine trouble with the expert knowledge and the user information, and an outputting part for allowing inference results from the inference part to be displayed for the user. The expert knowledge includes a cause candidate criterion pre-defined as an event used for selection of searching paths when the inference part makes a decision as to which path of the search tree should be traced back. The cause-to-effect links include an identifier indicative of a difference between self-dependency causes and other-dependency causes.

REFERENCES:
patent: 4697243 (1987-09-01), Moore et al.
patent: 4841456 (1989-06-01), Hogan, Jr. et al.
patent: 4964125 (1990-10-01), Kim
patent: 4972453 (1990-11-01), Daniel, III et al.
patent: 4985857 (1991-01-01), Bajpai et al.
Wilkinson, Mind: An Inside Look at an Expert System for Electronic Diagnosis, IEEE Design & Test, Aug. 1985, pp. 69-77.

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