An evaluation of a real-time fault diagnosis expert system for aircraft applicationsA fault monitoring and diagnosis expert system called Faultfinder was conceived and developed to detect and diagnose in-flight failures in an aircraft. Faultfinder is an automated intelligent aid whose purpose is to assist the flight crew in fault monitoring, fault diagnosis, and recovery planning. The present implementation of this concept performs monitoring and diagnosis for a generic aircraft's propulsion and hydraulic subsystems. This implementation is capable of detecting and diagnosing failures of known and unknown (i.e., unforseeable) type in a real-time environment. Faultfinder uses both rule-based and model-based reasoning strategies which operate on causal, temporal, and qualitative information. A preliminary evaluation is made of the diagnostic concepts implemented in Faultfinder. The evaluation used actual aircraft accident and incident cases which were simulated to assess the effectiveness of Faultfinder in detecting and diagnosing failures. Results of this evaluation, together with the description of the current Faultfinder implementation, are presented.
Document ID
19880047636
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schutte, Paul C. (NASA Langley Research Center Hampton, VA, United States)
Abbott, Kathy H. (NASA Langley Research Center Hampton, VA, United States)
Palmer, Michael T. (NASA Langley Research Center Hampton, VA, United States)
Ricks, Wendell R. (NASA Langley Research Center Hampton, VA, United States)