摘要
对基于特征图形匹配的月面精确着陆光学导航方法进行了研究,包括图像特征点提取、特征图形构建以及特征图形匹配.利用特征点间相对距离不变的特性,确立特征点的连通规则,解决存在平移、旋转和放缩等情况下的图形匹配问题.利用多幅月面真实图片对算法进行仿真测试,仿真结果验证了其有效性.以所提出的特征图形匹配方法为基础,设计仿真算例对导航方法进行验证,结果表明,基于特征图形匹配的光学导航方法可实时确定飞行器的位置和速度信息且精度较高,是适用于探月飞行器精确着陆导航的有效途径.
This paper focuses on the characterized graphics matching based navigation method of precise landing on the moon,which mainly consists of feature point extracting,characterized graphics constructing and matching.Based on the property that the relative distance between two characterized points is unchanged,by establishing the connected rules of two characterized points,the method is adopted to overcome the problem of graphics matching with translation,rotation and scale changes.The algorithm is tested with multiple real lunar pictures,and the emulational experiment results approve the effectiveness of the method.Navigation method based on the characterized graphics matching is validated by designing a numerical simulation.The simulations reveal that the method that can gain the position and speed of vehicle with high precision in nearly real-time is an effective solution to lunar precise landing.
出处
《空间科学学报》
CAS
CSCD
北大核心
2014年第6期858-866,共9页
Chinese Journal of Space Science
基金
深空探测国防重点学科实验室开放基金课题项目资助(HIT.KLOF.2011.078
HIT.KLOF.2012.077)
关键词
特征图形
图形匹配
月面着陆
光学导航
Characterized graphics
Graphics matching
Lunar landing
Optical navigation
