姿态异常下的星体自旋角速度确定方法

摘要

针对在轨姿态异常后星体高速自旋情况,开展星体自旋角速度确定方法研究.提出一种基于太阳敏感器测量数据确定自旋角速度的方法,并对自旋角速率确定误差进行分析,得到各误差源对确定精度的影响关系;基于角速率确定误差分析结论,给出根据角速度大小选取不同时间间隔测量数据的策略,通过大时间间隔测量数据的选取,保证小角速度情况下的确定精度.所提出方法的有效性通过数学仿真验证,并在实际应用中基于太阳敏感器遥测数据获取在轨姿态异常卫星角速度.%The problems of spinning angle velocity determination for satellites with attitude anomaly are investigated.A spinning angle velocity determination method based on sun sensors measurement is proposed,and the influence of individual error source on the angle rate determination error is obtained by deliberate analysis.According to the error analysis conclusion,a strategy is presented to maintain the determination precision for a smaller spinning angle rate by using different measurement data with larger time interval in spinning angle velocity calculation.The effectiveness of the proposed method is demonstrated by numerical simulations,and by applying the method with telemetry data of sun sensors the actual spinning angle velocity is also obtained for a satellite in-orbit out of control.