一种高精度小型化星敏感器设计

星敏感器是以恒星为参照系,以星空为工作对象的高精度空间姿态测量装置,提供准确的空间方位和基准,具有高精度、无漂移、工作寿命长等特点.针对星敏感器高精度和小体积的应用需求,基于小型化镜头设计、分体式结构、高集成度电路、"FP GA+ARM"软件等内容,提出了一种高精度小型化星敏感器,解决了狭小空间高度集成的小型化问题,实现了测姿0.6″(3σ)的高精度预期目标.星敏感器样机通过了试验考核,性能符合设计要求,具备全天球搜索恒星定姿的能力.

Design of a Star Sensor with High Precision and Small Volume

With high precision, non-shift and long-life, a star sensor is a device for measuring an object's attitude re-ferring to the stellar coordinates, which provides exact orientation and benchmark in space, and makes up a kind of hybrid navigation with inertial instrument. In view of the application requirement for a star sensor with high precision and small volume, the paper proposes a kind of star sensor based on the optical system with small, the separated structure, the high-integrated circuit, the software of "FPGA+ARM", which resolves the problem of the highly integration in the narrow and small space of the star sensor, and achieves the due goal of high precision that is 0. 6" (3σ) . The prototype of the star sen-sor passes the test evaluation, whose performance meets the requirements of design, and is provided with the ability of de-termining attitude through searching the stars in all the celestial sphere.