Computer Science
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.480..263m&link_type=abstract
In: Proceedings of the 9th European Space Mechanisms and Tribology Symposium, 19-21 September 2001, Liège, Belgium. Compiled by
Computer Science
Astrium, Reaction Wheel, Momentum Wheel, Hibernation Test, Rosetta, Xmm, Soho, Integral, Stork
Scientific paper
During the course of the Rosetta mission as the spacecraft approaches the orbit of Jupiter it will be subjected to an 18 month hibernation period to conserve energy. During this phase, the Reaction Wheels will see very low temperatures and as part of the qualification programme for the Rosetta mission an existing life test wheel was frozen at -35°C for 30 days to demonstrate that a mechanical wheel could survive this condition and be recovered to an operational state for the main observational period of the mission. A life test wheel, which had been on test since mid 1996, was tested prior to being frozen, immediately after hibernation and again 14 months later, just prior to the exactly on schedule delivery of the flight hardware. Development of the recovery procedure was also seen as an important part of this programme to assist with the development of the inorbit operational procedures for this part of the mission.
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