空间冗余陀螺仪在轨标定方法

An In-Flight Calibration for Redundant Inertial Measurement Gyroscope

针对航天器冗余陀螺仪误差系数的在轨标定问题,利用模型置换方法建立了冗余情况下的隐式标定模型,该模型结构简单,能够充分利用所有陀螺仪的测量信息。并以美国EOS-AQUA卫星的冗余陀螺仪为背景,利用仿真方法分析了该模型的优良性能。结果表明,利用模型置换方法能够有效提高误差系数标定精度,相对误差小于10%。

To calibrate redundant gyros instrument error of spacecraft in-flight, an implicit calibration model is set up using model replacement method. The implicit model is simple and can completely make use of measurement information of total gyros. The good performance of the model is validated in simulation by analyzing the redundant gyros system in EOS - AQUA satellite. The result shows that the calibration accuracy is enhanced remarkably by model replacement method and the relative error is less than 10%.