摘要
介绍了星敏感器的基本工作原理和星图图像的预处理的主要方法 ,将传统质心法、带阈值的质心法、平方加权质心法和高斯曲面拟合法应用于星敏感器中星图图像的星体细分定位 ,并进行了较为系统的仿真研究 .仿真结果表明 ,带阈值的质心法是一种较为理想的星体细分定位方法 .就噪声水平、阈值选择及低通滤波对细分定位精度的影响进行了仿真研究 .最后 ,利用仿真结果对模拟星图图像的星体进行了细分定位实验 。
The basic principle of star sensor and major preprocessing methods of star image were introduced. The traditional centroid method, threshold centroid method, squared centroid method and Gauss curve fitting method were applied to star locating of star image for star sensor. The simulation results show that threshold centroid method is most appropriate for star locating. The influences of noise level, filter processing and threshold choosing on the precision of star locating were simulated. The star locating of the actual star image can be done by threshold centroid method.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2003年第9期812-815,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
星图
定位
阈值
星敏感器
Acoustic noise
Astronomy
Image processing
Location
Position control
Sensors
