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SSF loads and controllability during assemblyThe Orbiter Primary Reaction Control System (PRCS) pulse width and firing frequency is restricted to prevent excessive loads in the Space Station Freedom (SSF). The feasibility of using the SSF Control Moment Gyros (CMG) as a secondary controller for load relief is evaluated. The studies revealed the CMG not only reduced loads but were useful for other SSF functions: vibration suppression and modal excitation. Vibration suppression lowers the g level for the SSF micro-g experiments and damps the low frequency oscillations that cause crew sickness. Modal excitation could be used for the modal identification experiment and health monitoring. The CMG's reduced the peak loads and damped the vibrations. They were found to be an effective multi-purpose ancillary device for SSF operation.
Document ID
19930009649
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Larson, Charles R.
(Rockwell International Corp. Downey, CA, United States)
Ghofranian, S.
(Rockwell International Corp. Downey, CA, United States)
Fujii, E.
(Rockwell International Corp. Downey, CA, United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1993
Publication Information
Publication: NASA. Langley Research Center, The Fifth NASA(DOD Controls-Structures Interaction Technology Conference, Part 1
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
93N18838
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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