A Star Map Recognition Method Based on Radial and Dynamic Circular Patterns

A star map recognition and dynamic ring technology, applied in the field of star map recognition, can solve the problems of high computational complexity and low recognition rate of the algorithm

Active Publication Date: 2020-11-03
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In order to solve the problems of low recognition rate and high computational complexity in the noise environment existing in existing star map recognition methods, the present invention provides a star map recognition method based on radial and dynamic circular patterns, which ensures that the position noise and In the presence of luminance noise and when the number of star points in the field of view is small, it has a high correct recognition rate for the star map

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  • A Star Map Recognition Method Based on Radial and Dynamic Circular Patterns
  • A Star Map Recognition Method Based on Radial and Dynamic Circular Patterns
  • A Star Map Recognition Method Based on Radial and Dynamic Circular Patterns

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[0069] According to the above-mentioned basic realization principle, the present method is further introduced according to a specific embodiment, as figure 1 As shown, the method includes the following steps:

[0070] Step 1: Establish the radial and dynamic circular modes corresponding to the navigation stars. Scan the original star catalog with the full-celestial scanning method, and select the 10 brightest star points in each field of view as navigation stars. According to the 10 navigation stars The radial pattern and the dynamic circular pattern corresponding to several navigation stars are established respectively according to the position distribution characteristics of the neighboring stars around them; The Hipparcos catalog of ESA, the HD catalog of Harvard University Observatory, or other existing catalogs can also be used;

[0071] Such as figure 2 As shown, the specific steps to establish the radial mode corresponding to the navigation star are:

[0072] Step A...

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Abstract

The invention discloses a star map identification method based on radial and dynamic circumferential modes and ensures a relatively high correct identification rate of a star map in the presence of position noise and brightness noise and in the case of a small number of star points in a field of view. The method mainly comprises steps of 1, establishing the radial and dynamic circumferential modescorresponding to a navigation star; 2, creating a navigational star database of a plurality of navigational stars; 3, establishing a radial mode and a dynamic circumferential mode corresponding to the observation star; 4, performing initial identification; and 5, performing accurate identification.

Description

technical field [0001] The invention belongs to the field of star map recognition, in particular to a star map recognition method based on radial and dynamic circular patterns, which is applied to the pose calculation of star sensors. Background technique [0002] As an important component of the navigation control system, the star sensor has been widely used in the attitude measurement of spacecraft due to its high reliability, high precision, strong autonomy and no error accumulation. The front-end imaging system acquires the starry sky image (referred to as the star map) within the current field of view, extracts the position coordinates and brightness information of the stars in the star map, and completes the corresponding matching between the observed star and the navigation star in the database by the star map recognition algorithm, and finally uses The three-axis attitude information of the star sensor is obtained by matching star pairs. In the above workflow, the s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02G01C21/20
CPCG01C21/02G01C21/20
Inventor 刘美莹卫昕王虎薛要克赵惠汶德胜
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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