卫星姿态确定中星敏感器热变误差的辨析与补偿

摘要

This article selects the star sensors as the research object, researches a kind of suitable for engineering application of heat frequent error analysis method. Thermal alteration error is modeled as a Fourier series, using the least squares algorithm. Star sensitive thermal alteration in the parameters is estimated from the constant gyro drift error, as the amplitude of the sine and cosine function of the Fourier series. And then according to Fourier series form of thermal error model and estimation of the thermal error of parameters, heat frequent error simulation expression is given. It is provided compensation basis to reduce the thermal error of the impact on the attitude determine results.%本文选用星敏感器为研究对象，研究一种适合工程应用的热变误差的辨析方法。将热变误差建模为傅里叶级数，采用最小二乘算法，从陀螺的常值漂移中估计星敏感器热变误差的参数，即傅里叶级数中各正弦和余弦函数的振幅，然后，根据傅里叶级数形式的热变误差模型和估计得到的热变误差的参数，模拟产生热变误差的表达式，并进行补偿，从而减小热变误差对姿态确定结果的影响。