| タイトル | Attitude Control System Design for the Solar Dynamics Observatory |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050243617 |
| 著者（英） | Mason, Paul A. C.; Morgenstern, Wendy M.; Vess, Melissa F.; Kuo-Chia, Liu; Starin, Scott R.; Andrews, Stephen F.; Bourkland, Kristin L. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2005-01-01 |
| 言語 | eng |
| 内容記述 | The Solar Dynamics Observatory mission, part of the Living With a Star program, will place a geosynchronous satellite in orbit to observe the Sun and relay data to a dedicated ground station at all times. SDO remains Sun- pointing throughout most of its mission for the instruments to take measurements of the Sun. The SDO attitude control system is a single-fault tolerant design. Its fully redundant attitude sensor complement includes 16 coarse Sun sensors, a digital Sun sensor, 3 two-axis inertial reference units, 2 star trackers, and 4 guide telescopes. Attitude actuation is performed using 4 reaction wheels and 8 thrusters, and a single main engine nominally provides velocity-change thrust. The attitude control software has five nominal control modes-3 wheel-based modes and 2 thruster-based modes. A wheel-based Safehold running in the attitude control electronics box improves the robustness of the system as a whole. All six modes are designed on the same basic proportional-integral-derivative attitude error structure, with more robust modes setting their integral gains to zero. The paper details the mode designs and their uses. |
| NASA分類 | Solar Physics |
| 権利 | No Copyright |
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