Computer Science – Performance
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.524..409i&link_type=abstract
In: Proceedings of the 10th European Space Mechanisms and Tribology Symposium, 24-26 September 2003, San Sebastián, Spain. Compi
Computer Science
Performance
1
Actuators
Scientific paper
Quantitative experiments were conducted for a new type of actuator that uses shape memory alloy (SMA), which was developed for the solar paddle of small satellites and presented in the 9th ESMATS. The actuator can orient the solar paddle alone toward the sun, and is equipped with a counterweight to compensate for the rotating motion of the small satellite in microgravity. The actuator measures 100 mm in diameter and 127 mm in height, and weighs approximately 660 g including the counterweight (340 g). To rotate the solar paddle, we used six SMA springs, each of which has a cylindrical mirror in the rear in order to concentrate the sun's energy onto the spring. Drop shaft experiments were conducted to confirm the performance of the counterweight. Motion repetition experiments in vacuum were also conducted to investigate the degradation properties of the SMA. Ideas for improvement are proposed from the results.
Iwata Toshiaki
Komoda Youichi
Murakami Hiroshi
Ogawa Akira
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