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地球同步三轴稳定卫星在正常运行方式下的偏航姿态控制分主动式和被动式两种。主动偏航姿态控制需要偏航姿态信息,而在位置保持机动方式下需要偏航主动控制,这也需要偏航信息。由于天线反射器法线和卫星本体偏航轴并不重合,往往有几度夹角,偏航姿态偏差对天线指向精度要求的提高,对偏航精度要求也愈来愈高。本文针对目前地球同步三轴稳定卫星常用的偏航姿态确定方法做了讨论。着重讨论了利用太阳敏感器,地球敏感器和射频敏感器的三种组合模式确定偏航资态的方法,包括利用统计法估计偏航姿态。本文还对上述各种方法进行了误差分析和性能比较。
Yaw attitude control of the geosynchronous three-axis stabilized satellite in normal operation mode is sub-active and passive. Active yaw attitude control requires yaw attitude information while yaw active control is required in position-keeping maneuvering, which also requires yaw information. As the antenna reflector normal and the satellite body yaw axis do not coincide, there are often several degrees, yaw attitude deviation of the antenna pointing accuracy requirements, the yaw accuracy requirements are getting higher and higher. This paper discusses the commonly used method of yaw attitude determination for the geosynchronous three-axis stabilized satellite. This paper focuses on the method of determining the yaw state using the three combination modes of solar sensor, earth sensor and radio frequency sensor. The method includes the statistical method to estimate the yaw attitude. This article also carried out the error analysis and performance comparison of the above methods.