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Title:
SPICA Micro-vibration Control System Design for Precision Pointing Stability
Authors:
Mitani, S; Kawakatsu, Y; Sakai, S; Murakami, N; Yamawaki, T; Mizutani, T; Komatsu, K; Nakagawa, T
Presented at:
Porto 2014
DOI:
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Abstract:

The SPICA (Space Infrared Telescope for Cosmology and Astrophysics) is an astronomical mission, optimized for mid- and far-infrared astronomy with a 3-m class telescope, which is cryogenically cooled to under 6 K. In the SPICA current status, a Risk-Mitigation Phase (RMP) has started from 2012 to 2014. The activities to be undertaken during this period include consolidating the micro-vibration control design for the satellite, as well as a number of breadboarding activities centered on technologies that are critical to the success of the SPICA mission. This paper presents the RMP activity results on the micro-vibration control design. A detailed pointing stability analysis is performed with a constructed spacecraft finite element model. A passive isolator BBM on the cooler pedestal was also designed and is evaluated. A highly accurate and ultra-low heat dissipation TTM BBM has been produced and evaluated with a cryogenic chamber.