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Engine Data Interpretation System (EDIS)A prototype of an expert system was developed which applies qualitative or model-based reasoning to the task of post-test analysis and diagnosis of data resulting from a rocket engine firing. A combined component-based and process theory approach is adopted as the basis for system modeling. Such an approach provides a framework for explaining both normal and deviant system behavior in terms of individual component functionality. The diagnosis function is applied to digitized sensor time-histories generated during engine firings. The generic system is applicable to any liquid rocket engine but was adapted specifically in this work to the Space Shuttle Main Engine (SSME). The system is applied to idealized data resulting from turbomachinery malfunction in the SSME.
Document ID
19910010892
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Cost, Thomas L. (Alabama Univ. Huntsville, AL, United States)
Hofmann, Martin O. (Alabama Univ. Huntsville, AL, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1990
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
NASA-CR-184417
UAH-RR-ME-90-101
NAS 1.26:184417
Accession Number
91N20205
Funding Number(s)
CONTRACT_GRANT: NAS8-36955
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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