スターセンサを用いた衛星姿勢および角速度の推定とその軌道上実証

摘要

We have developed Satellite controller Integrated with Star sensors (SIS) as a prototype of a future small and low-priced satellite controller. To reduce size and cost of the controller, SIS integrates attitude sensors into star sensors with medium resolution and medium sensitivity, adopts Commercial Off-The-Shelf (COTS) electrical parts for key parts such as CPU and CCD, and integrates several electronics for star identification, attitude determination, attitude control, and data handling into a single processing unit. Newly developed computer architecture is introduced for high reliability with COTS parts under the harsh space environment. In this paper, we will focus on the new star identification algorithm dedicated for star sensors with medium resolution and medium sensitivity and evaluate it with in-orbit experiment data of SIS.%近年，スターセンサ基準の衛星姿勢系が主流になってき ている．その理由として，地球観測衛星の姿勢決定精度要 求が，これまで用いられてきた地球センサや太陽センサの 能力を超えるようになってきたこと，低軌道衛星の姿勢 決定系を太陽センサと地球センサとジャイロのような異種 のセンサの組み合わせで構成する代わりに複数台のスター センサで統合化することで小型低価格化の可能性があるこ と，などがあげられる．