Star pattern identification method and star pattern identification device of hybrid redundancy feature

Abstract

The invention discloses a star pattern identification method of a hybrid redundancy feature. The star pattern identification method comprises the following steps of: based on the geometric position relation of the navigation star points, establishing a hybrid redundancy pattern feature of a navigation reference star point, and then, creating a binary feature database of the navigation reference star point; based on the geometric position relation of a star map and the star points, calculating the hybrid feature of the star map reference star point; according to the hybrid feature of the star map reference star point, selecting candidate star points corresponding to the star map reference star point from the binary feature database by using similar score measurement; by a maximum matching pair algorithm, selecting a matched star point for the star map reference star point from all the candidate star points. The invention also discloses a star pattern identification device of the hybrid redundancy feature. With the method and the device, high accurate identification rate can be realized under the condition of high star point position noise and star magnitude noise, moreover, acquisition of the matched star point is guaranteed when few accompanying star points exist in the radius of the navigation star point pattern.

Description

technical field [0001] The invention relates to the field of star pattern recognition, in particular to a star pattern recognition method and device with mixed redundant features. Background technique [0002] At present, star sensors are usually used for spacecraft attitude measurement, and its working principle is: by using star sensors to collect star maps, comparing the obtained star maps with the database storing known star point positions to complete star map recognition , to obtain an attitude with an accuracy of several arcseconds. In the above process, star map recognition is a key technology in spacecraft attitude measurement, pattern star map recognition algorithm in the star map recognition algorithm is an important class of recognition algorithms, and the establishment of star point ring pattern is a pattern class star map An important development direction of recognition algorithms. The star point ring mode is: select the navigation star point as the center o...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned star pattern recognition algorithm for the star point ring mode does not fully consider the influence of the star point position noise on the position of the accompanying star points in the ring belt and the influence of the lack of accompanying star points caused by the magnitude noise. In the case of large star point position noise and star magnitude noise, the correct recognition rate drops significantly; in addition, when there are fewer accompanying star points within the radius of the navigation star point pattern, the distinction of the established star point pattern decreases, and the redundant star point increase, resulting in the inability to obtain matching star points

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