一种基于FPGA实现实时提取恒星星像坐标的方法  

An Obtaining Star Locations Method with FPGA for Star Sensor

作　　者：李葆华[1] 曾庆双[1] 张同双[2] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]中国卫星海上测控部,江苏江阴214431

出　　处：《导航定位与授时》2015年第1期46-51,共6页Navigation Positioning and Timing

基　　金：十二五预研课题(51309040101);飞行器海上测量与控制联合实验室开放基金项目(FOM2014OF13)

摘　　要：提出一种基于FPGA实现实时提取恒星星像坐标的方法。该方法在提取恒星星像坐标过程中,不必利用当前图像下一列坐标的灰度值和当前列下一行坐标的灰度值,而仅仅采用当前图像当前行的上一列坐标的灰度值以及当前列的上一行坐标的灰度值,A/D转换成数字量后,把星图图像保存到SRAM和提取恒星星像坐标两个过程并行。实验结果表明,采用该方法不仅能够准确提取恒星星像坐标,而且能够进一步提高坐标提取的实时性,满足星敏感器并行流水工作模式的要求。An obtaining star locations method with FPGA for star sensor is presented in this paper. The next row pixel gray value and the next arrange gray value of the star image are not used to obtain star locations with the method. The previous row pixel gray value and the previous arrange gray value of the star image are used to obtain star locations with the method, which results to save the star image to the SRAM and FPGA implementation using real-time obtaining star locations of the two processes as fully parallel mode. The experimental results show that not only the star locations are accurately obtained from the star image, but also the real-time of obtaining star locations from the star image is im- proved. The star sensor operating mode with parallel pipeline is used with the method presented in this paper.

关 键 词：星敏感器 星跟踪算法 大角速度机动 

分 类 号：V321.1[航空宇航科学与技术—人机与环境工程]