摘要
研究了载体角运动及振动对星敏感器成像的影响,推导并建立了不同飞行状态下星图模糊的数学模型.在此基础上讨论了多重运动模糊机理,提出采用分步复原方案去除多重星图模糊,以保证高动态环境下星敏感器工作的精确性及稳定性.仿真结果表明,载体运动造成的星体质心提取误差与具体运动形式及参数有关,并通过比较复原前后星敏感器的定姿效果,验证了模糊星图分步复原方法的有效性.
The impact of vehicle angular and vibrational motion on the star imaging process was researched,and the mathematical model of motion blur corresponding to various flight states was deduced and established then.On this basis,the mechanism of multiple motion blur was discussed.In order to ensure the accuracy and stability of star sensor under high dynamic conditions,a step-by-step restoration was proposed to remove the multiple blur of star image.The simulation results indicate that the star centroiding accuracy caused by vehicle motion is related with specific motion type and parameters,and the restoration method is validated by comparing the attitude estimates before and after the restoration of blurred star image.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2011年第11期1338-1342,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
航天支撑基金资助项目(2008)
关键词
星敏感器
运动
多重模糊
复原
star sensor
motion
multiple blur
restoration
