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A flight expert system (FLES) for on-board fault monitoring and diagnosisThe increasing complexity of modern aircraft creates a need for a larger number of caution and warning devices. But more alerts require more memorization and higher work loads for the pilot and tend to induce a higher probability of errors. Therefore, an architecture for a flight expert system (FLES) to assist pilots in monitoring, diagnosing and recovering from in-flight faults has been developed. A prototype of FLES has been implemented. A sensor simulation model was developed and employed to provide FLES with the airplane status information during the diagnostic process. The simulator is based partly on the Lockheed Advanced Concept System (ACS), a future generation airplane, and partly on the Boeing 737, an existing airplane. A distinction between two types of faults, maladjustments and malfunctions, has led us to take two approaches to fault diagnosis. These approaches are evident in two FLES subsystems: the flight phase monitor and the sensor interrupt handler. The specific problem addressed in these subsystems has been that of integrating information received from multiple sensors with domain knowledge in order to assess abnormal situations during airplane flight. This paper describes the reasons for handling malfunctions and maladjustments separately and the use of domain knowledge in the diagnosis of each.
Document ID
19870055355
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ali, M.
(Tennessee Univ. Tullahoma, TN, United States)
Scharnhorst, D. A.
(Tennessee Univ. Tullahoma, TN, United States)
Ai, C. S.
(Tennessee Univ. Tullahoma, TN, United States)
Ferber, H. J.
(Tennessee, University Tullahoma, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Aircraft Instrumentation
Accession Number
87A42629
Funding Number(s)
CONTRACT_GRANT: NAG1-513
Distribution Limits
Public
Copyright
Other

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