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A method for determining the flight readiness of the integrated Space Shuttle systemThe Space Shuttle Dynamic Integrated Test (DIT) system is described. The DIT is an open-loop system which makes no attempt to simulate Shuttle sensors, and by which the Shuttle redundancy management system is left unmodified. Open-loop operation is shown to inherently require less computing capacity during a test than the closed-loop alternative. DIT tests have generated a high degree of confidence in the Shuttle hardware, allowing the identification of such problems as a sluggish main fuel valve, which caused a countdown hold seconds before the simulated T-zero, and Main Engine Controller software malfunctions. Attention is given to the combination and substitution of sensor data, the modification of nominal flight software, and the preparation of simulation data. It is noted that greater performance would have been achieved if the interface with DIT had been a design requirement from the outset of Space Shuttle development.
Document ID
19820052592
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bacon, I.
(Intermetrics, Inc. Huntington Beach, CA, United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1982
Publication Information
Publication: vol. 35
Subject Category
Space Transportation
Accession Number
82A36127
Funding Number(s)
CONTRACT_GRANT: NAS9-14000
Distribution Limits
Public
Copyright
Other

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