扫描镜运动对三轴稳定卫星姿态影响研究

推导了带扫描镜运动的星体姿态动力学方程，以此方程对扫描过程进行了仿真计算，分析了扫描镜做扫描运动时星体姿态运动的一般规律及星体与扫描镜之间惯量比对星体姿态的影响。结果表明，扫描镜的步进运动将引起星体滚动姿态的单调变化，而周期性的扫描运动将引起星体偏航和俯仰姿态的周期性运动。改变扫描镜绕步进轴的转动惯量主要影响星体滚动姿态，而改变扫描镜绕扫描轴的转动惯量，主要对星体俯仰、偏航运动姿态有影响。

Effects of Scan Mirror Motion on the Attitude of Three-Axis-Stabilized Geostationary Satellite

We contracted to study the effects of both stepping and scanning motion of scan mirror on the attitude of three axis stabilized geostationary satellite. According to the dynamic characteristics of satellite/scan mirror system, section 3 gives detailed derivation of the dynamic equations of geostationary satellite with scan mirror motion. Section 4 gives the simulation calculations for a specific numerical example. On the basis of simulation calculations, section 4 analyzes the effects of the ratio between moment of inertia of satellite and that of scan mirror on satellite attitude. The results of analysis show that: (1) changing the moment of inertia of the scan mirror about stepping axis mainly affects roll attitude of the satellite; (2) changing the moment of inertia about scanning axis mainly affects pitching and yaw attitude of the satellite. These effects should be considered in the design of attitude control system.