一种测试星敏感器空间指向的方法

A Method of Testing the Space Pointing of Star Sensor

关键词:  星敏感器  地方时  惯性指向

Key words:  Star senor  Local time  Inertial pointing

摘要:

星敏感器作为高精度姿态测量单机,为高精度姿态控制提供前提保障。确保星敏感器空间指向正确性对姿控系统至关重要。基于此提出了一种在外场观星试验中,通过测试星敏感器地方时惯性指向来确认空间指向的方法,该方法结合格林尼治恒星时概念,通过地心赤道惯性坐标系与当地地理系之间的转换关系进行算法设计,是验证选用的星敏感器空间指向正确与否的重要手段。

Abstract:

The star sensor acts as a highprecision attitude measure equipment, which provides a guarantee for highprecision attitude controlEnsuring the correction of the star sensor space orientation is crucial to the attitude control systemBased on this, this paper puts forward a method of confirming space pointing by testing the local time inertial orientation of the star sensor in real space experimentsCombined with the concept of the Greenwich sidereal time, the method is designed using the conversion through the geocentric equatorial inertial coordinate and the local geographic coordinate, and it is an important means to verify the correction of selected the star sensor space pointing.