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Accession Number N20120012986
Title Orion MPCV Service Module Avionics Ring Pallet Testing, Correlation, and Analysis.
Publication Date Jun 2012
Media Count 58p
Personal Author J. Akers L. Staab T. Jones V. Suarez
Abstract The NASA Orion Multi-Purpose Crew Vehicle (MPCV) is being designed to replace the Space Shuttle as the main manned spacecraft for the agency. Based on the predicted environments in the Service Module avionics ring, an isolation system was deemed necessary to protect the avionics packages carried by the spacecraft. Impact, sinusoidal, and random vibration testing were conducted on a prototype Orion Service Module avionics pallet in March 2010 at the NASA Glenn Research Center Structural Dynamics Laboratory (SDL). The pallet design utilized wire rope isolators to reduce the vibration levels seen by the avionics packages. The current pallet design utilizes the same wire rope isolators (M6-120-10) that were tested in March 2010. In an effort to save cost and schedule, the Finite Element Models of the prototype pallet tested in March 2010 were correlated. Frequency Response Function (FRF) comparisons, mode shape and frequency were all part of the correlation process. The non-linear behavior and the modeling the wire rope isolators proved to be the most difficult part of the correlation process. The correlated models of the wire rope isolators were taken from the prototype design and integrated into the current design for future frequency response analysis and component environment specification.
Keywords Avionics
Correlation
Crew exploration vehicle
Damping
Displacement
Feasibility analysis
Finite element method
Frequency distribution
Isolators
Ring structures
Service modules
Simulators
Spacecraft design
Stiffness
Weight(Mass)
Wiring

 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 84G - Unmanned Spacecraft
84C - Manned Spacecraft
Corporate Author National Aeronautics and Space Administration, Cleveland, OH. NASA John H. Glenn Research Center at Lewis Field.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1303
Contract Number N/A

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