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Development of an Actuator for Ambient to Cryo ApplicationDuring the qualification campaign of the NIRSpec Instrument Mechanism, the actuator could not achieve the expected life time which was extended during the development phase. The initial design could not be adapted to the requested number of revolutions during that phase. Consequently the actuator needed to be modified such that the function of the mechanism would not be endangered and thus the overall function of the NIRSpec instrument. The modification included the change of the overall actuator design - internal dimensions, tolerances, materials, lubrication and assembly process - while keeping the interface to the mechanism, mass, and function. The lessons learned from the inspection of the failed actuator have been implemented in order to ensure the development and qualification success. The initially available time for this activity was in the range of 6 months to meet the overall program schedule.
Document ID
Document Type
Conference Paper
Menzel, Karen (EADS Astrium Ltd. Friedrichshafen, Germany)
Jung, Hans Jurgen (EADS Astrium Ltd. Friedrichshafen, Germany)
Schmidt, Joerg (PHYTRON-Elektronik G.m.b.H Groebenzell, Germany)
Date Acquired
August 29, 2013
Publication Date
May 12, 2010
Publication Information
Publication: Proceedings of the 40th Aerospace Mechanisms Symposium
Subject Category
Space Sciences (General)
Distribution Limits
Public Use Permitted.

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IDRelationTitle20100021914Analytic PrimaryProceedings of the 40th Aerospace Mechanisms Symposium