Research Of Improving Star Sensor Angle Measurement Precision

As a type of angle measurement instrument, with high precision and high sensitivity, star sensor provides fiducial direction for guidance and navigation instrument of aircrafts. R&D of high precision star sensor plays a significantly practical role in development of aeronautics, astronautics and national defense.So far, none of star sensor prototypes has been found equipped with lens hood in native missiles. For improving engineering practicability of star sensor and reducing noise of space scattering lights, designing and selecting of lens hood parameters of star sensor and engineering amelioration of prototype were brought forward, based on design principles and correlative data of foreign missile, which regard lens hood of space star sensor.From the point of view of improving angle measurement of star sensor, scheme analysis and optimal selection were carried out. Theoretical precision analysis of angle measurement was done, and practical engineering subdivision arithmetic was presented, which meets system requirement for precision. In the end, causation was discussed, which possibly introduces data error to system static simulating test.