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Quick method for recognizing star map

A star map recognition and fast technology, applied in the field of star map recognition, can solve the problems of large navigation data table, low recognition rate, long search time, etc., to reduce hardware resource occupation, solve too many comparison times, speed up and efficiency effect

Inactive Publication Date: 2007-05-09
BEIHANG UNIV
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Problems solved by technology

Therefore, although this method can reduce the number of triangles to be selected, because the parameters used to calculate the sides and included angles are different, the errors of the two are also different, so it is necessary to estimate the observation error and set different error thresholds during recognition. Inconvenience for storage and identification
Moreover, due to the huge number of triangles formed by the navigation star and the large amount of stored navigation star catalog data, the speed of searching the navigation star catalog will directly affect the recognition speed and recognition efficiency of the star map.
[0007] It can be seen that any three stars in the starry sky can form a triangle in the prior art. Although the traditional triangle recognition algorithm is simple in structure and easy to implement, it has many disadvantages: the required navigation data table is generally large, and the search time is long. And the recognition rate is not high

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  • Quick method for recognizing star map
  • Quick method for recognizing star map
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Embodiment Construction

[0028] The basic idea of ​​the present invention is: determine the characteristic triangle of each navigation star, store the information of the unique characteristic triangle corresponding to each navigation star, calculate the projection vector value of the characteristic triangle, and store the calculated projection vector value and the characteristic triangle information together ; When performing star map recognition, first determine the characteristic triangle corresponding to the observed star, then calculate the projection vector value of the characteristic triangle, and then find out the candidate triangle from all the characteristic triangles stored according to the projection vector value, and carry out with the observation triangle Compare and match, if it matches, the star map recognition is successful.

[0029] Here, the characteristic triangle means: for each navigation star, the triangle formed by the navigation star and the two brightest stars around it is the ...

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Abstract

A method for fast recognizing star map includes such steps as determining the characteristic triangle of each pilot star calculating the projection vector value of each characteristic triangle, storing the information and projection vector value of each characteristic triangle, determining the characteristic triangle of a star to be observed, calculating its projection vector value, and searching from the stored characteristic triangles to find out a match.

Description

technical field [0001] The invention relates to star map recognition technology, in particular to a fast star map recognition method based on projection vectors. Background technique [0002] As a spacecraft attitude measurement component, the star sensor is playing an increasingly important role, and star map recognition is one of the key steps for the star sensor to complete the spacecraft attitude measurement. The so-called star map recognition is to match the star map composed of the observed stars in the field of view of the star sensor and the star map composed of the navigation stars in the navigation star catalog according to geometric features to determine the corresponding relationship between the observed stars and the navigation stars. Among the various existing star map recognition algorithms, the triangle recognition algorithm is by far the most common method, which has been extensively studied and has many practical applications. The basic idea of ​​the trian...

Claims

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Application Information

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IPC IPC(8): B64G3/00G01C21/24
Inventor 张广军杨建江洁
Owner BEIHANG UNIV
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