Layout Design of Satellite Star Sensor Fixed to Rotation Platform

Abstract

AbstractSatellite attitude determination is one of the key parts of control system design. Star sensor (STS) is one of the high-precision attitude measurement instruments. However, the STS fixed on the load platform rotate and is frequently affected by solar radiation, earth atmosphere radiation and other factors, which is not conducive to the accuracy of satellite high-precision attitude determination. In view of the above problems, many factors are considered comprehensively, and the layout design of STS fixed on rotation platform is proposed in this paper. There are four STS adopted, and the angle between the optical axis conic pendulum curve of two STSs in each group is greater than or equal to 70° at the intersection of the satellite X-axis and the solar plane, which is equal to twice the stray light suppression angle of STSs, and the angle of any two STSs is as close to 90° as possible in geometric space. Based on the layout scheme, it is ensured that the sunlight doesn’t enter each STS at the same time. The results of STK simulation show that the layout scheme is reasonable and feasible, and is suitable for the influence of different seasonal.KeywordsRotation platformStar sensorLayoutSolar synchronous orbit