空间陀螺仪显式标定与隐式标定方法

针对航天器陀螺仪误差系数的标定问题,提出了显式与隐式两种标定方法.建立了显式标定与隐式标定方法的状态方程与测量方程,利用扩展Kalman滤波获得了陀螺仪误差系数的高精度估计,同时比较了显式标定与隐式标定的不同,仿真结果表明,在当前参数设置下,显式标定与隐式标定精度基本相同,两种方法得到的误差系数估计相对误差在10%以内,而隐式标定方法实现较为容易,但对航天器姿态测量精度较为敏感.

Explicit and Implicit Calibration for In-flight Spacecraft Gyroscope

The explicit and implicit calibration approaches for spacecraft gyros were introduced.The dynamic equation and measurement equation of explicit and implicit approaches were set up,and estimation of calibration parameters was obtained by extended Kalman filter.In particular,the two approaches applied to in-flight spacecraft gyro calibration were compared.The result simulation shows that the performances of the two approaches are basically comparable,and relative accuracy is less than 10%.Sensitivity tests indicate that the explicit filter results are essentially insensitive to variations in given spacecraft dynamics model parameters,but explicit filter implements were easily.