太阳模拟器两轴回转控制系统研究

太阳敏感器是卫星控制系统中的一个重要部件，装星之前需要通过地面试验验证其各项功能及技术指标.本文针对太阳敏感器的地面测试设备——太阳模拟器两轴回转控制系统展开研究.该系统采用伺服电机与绝对式光电编码器相结合的方案，包括偏航与俯仰两个回转控制机构，主要用于改变太阳模拟器光轴的方向.给出了回转控制系统的组成和工作原理，并对影响系统精度的因素进行了分析.实验表明，回转系统的角度控制精度优于0.03°，满足该地面测试设备设计时提出的0.04°精度指标. 

Study on Solar Simulator Two-axis Rotation Control Systemormalsize

Sun sensor is an important component in the satellite control system. Prior to loading on the star, the sensor needs to be tested in the ground to verify its various function and technical index. Aiming at the ground test equipment of Sun sensor, a two-axis rotation control system of solar simulator was studied. The system includes the yaw and pitch rotary control mechanism, which are mainly used to change the direction of the optical axis of the solar simulator. In the control system, the servo motor is combined with absolute photoelectric encoder. In this paper, the composition and working principle of rotary control system are given, and the factors that can affect the precision of the system and measure its precision through the experiment are analyzed. Experiments show that the angle of rotation of the control system accuracy is better than 0.03°, which can meet the precision index of 0.04° when the design of the ground instrument is put forward.