Mathematics – Logic
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.591..253d&link_type=abstract
In: Proceedings of the 11th European Space Mechanisms and Tribology Symposium, ESMATS 2005, 21-23 September 2005, Lucerne, Switz
Mathematics
Logic
1
Mechanisms Components
Scientific paper
The increasing complexity and sensitivity of rotational on board equipment (such as antennas, pointing mechanisms and oscillating actuators) requires a miniaturized electrical signal and power transfer mechanism showing not only very low electrical noise and resistance but often also constant torque over the whole rotation. A Slip Ring Assembly (SRA) is the most suitable system for applications with such demands. The large potential to optimize the ratio of size to electrical power in a SRA is a considerable advantage compared to a traditional limited angle flexible cable connection devices like a cable wrap, even in limited angle oscillating systems. A series of miniaturized SRA's have been developed in order to comply with the new technical requirements of such applications. Verification and optimization of the important tribological system providing the sliding electrical contact has been performed in order to guarantee good electrical and mechanical performance over a spinning and/or oscillating life time. Studies and tests have been performed to assure conformance to high level vibration and shock requirements while minimizing the SRA size and mass. A preliminary life test has been performed on a breadboard SRA by Centre National d'Etudes Spatiales (CNES), demonstrating the suitability of the chosen technologies in the miniaturized SRA. The latest evolution of the design has recently been extensively tested to confirm its aptness to the foreseen technical requirements for a miniaturized SRA.
Delachaux A.
Feusier Gilles
Mäusli Pierre-Alain
Sjöholm Mikael
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