振动模糊星图仿真技术研究

摘要

分析了飞行器振动对星敏感器成像的影响,推导并建立该影响下星图模糊的数学模型.该模型首次通过角振动功率谱密度数据定量地模拟星点的随机振动轨迹,并在此基础上做出振动对星敏感器成像的影响分析.仿真结果表明,该方法可以较真实地模拟星图振动模糊效果.星点质心提取精度与角振动功率谱幅值在对数域上线性相关.%The influence of aircraft vibration on the star image captured by star sensors is analyzed, and the mathematical model of vibration blurred star image is deduced and established, which is the first time to quantitatively analyses the effects of vibration on star point extraction accuracy use the data of power spectral density. On this basis, an algorithm is proposed to simulate motion-blurred star image. The simulation results indicate that the star extraction accuracy caused by aircraft motion is linear correlation to specified angular vibration power spectral density in log domain.