磁强计数据辨识卫星自旋状态

Satellite Spin State Determination Using Magnetometer Data

针对近地低轨三轴稳定卫星在轨管理后期,除磁强计外其他姿态敏感器都无效情况下的姿态异常问题,分析了三轴稳定卫星失去姿态基准后,星体自旋状态下三轴磁强计测量数据的特点,提出了使用磁强计测量数据的矢量信息,以找到能够获取卫星状态的方法,从而建立了磁强计测量矢量与卫星自旋轴的几何关系,给出了处于自旋状态下的卫星自旋轴确定方法。通过此种辨识方法,获得了某气象卫星姿态异常翻转状态下的自旋矢量方向和自旋角速度,从而证明了该辨识方法快速、有效,可以作为姿态异常卫星自旋状态的辨识手段,为恢复卫星姿态提供了重要信息,具有一定的工程应用价值。

To trouble shoot attitude abnormalities of low earth orbit three-axis stabilized satellite when attitude sen sots are invalid except three-axis magnetometer, three-axis magnetometer data features of spin satellite are investigated, and the use of magnetometer data vector information to find access is proposed to satellite attitude state after the satellite lost attitude reference. The geometric relationship between the magnetometer measurement vector and the satellite spin axis is established and the method of spin axis determination is given in satellite spin state. Through the identification method, some meteorological satellites abnormal rollover state spin axis vector direction and spin angular velocity are obtained. It is proved that the identification method is rapid, effective and can be used as a means to identify abnormal satellite spin state. The algorithm has a good engineering application prospect and is a beneficial exploration for restoring normal attitude of the three-axis stabilized satellites.