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Star map identification method based on radial and dynamic circumferential modes

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

Active Publication Date: 2020-05-19
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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  • Star map identification method based on radial and dynamic circumferential modes
  • Star map identification method based on radial and dynamic circumferential modes
  • Star map identification method based on radial and dynamic circumferential modes

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Embodiment

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

[0070] Step 1: Establish the radial and dynamic ring mode corresponding to the navigation star. Scan the original star catalog with the whole celestial scanning method, and select the 10 brightest star points in each field of view as the navigation star. According to the 10 navigation stars Based on the location and distribution characteristics of its neighboring stars, establish the radial pattern and dynamic ring pattern corresponding to several navigation stars; the original star catalog used in this example is the SAOJ2000 catalog of the Smithsonian Observatory in the United States, of course, it can also be used ESA’s Ibagos catalog, Harvard University’s HD catalog, or other existing catalogs;

[0071] Such as figure 2 As shown, the specific steps for establishing the rad...

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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, and particularly relates to a star map recognition method based on radial and dynamic ring patterns, which is applied to the position and attitude calculation of a star sensor. Background technique [0002] As an important component of the navigation control system, the star sensor has been widely used in spacecraft attitude measurement due to its high reliability, high precision, strong autonomy and error-free accumulation. Its working principle is: The front-end imaging system acquires the starry sky image (star map for short) in the current field of view, extracts the location coordinates and brightness information of the star in the star map, and uses the star map recognition algorithm to complete the corresponding matching between the observed star and the navigation star in the database. The three-axis attitude information of the star sensor is calculated by matching the star pair. In the ab...

Claims

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Application Information

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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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