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Method for recognising not gauged star map

A star map recognition, non-calibration technology, applied in the field of star map recognition, can solve problems such as grid algorithm influence, grid deviation, focal length change, etc., to achieve the effect of speeding up speed and efficiency, reducing occupation, and reducing storage space

Inactive Publication Date: 2007-07-25
BEIHANG UNIV
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Problems solved by technology

However, during the operation of the star sensor, the focal length of the lens will change, and the resulting image will also be enlarged or reduced. If the calibration of these two parameters is not accurate, or the star sensor changes during the flight, then, The angular distance value calculated on this basis will have a large error, and then the search range of the navigation database must be expanded during identification, which will increase the calculation burden and identification time, and the identification accuracy will also decrease.
[0003] Similarly, the current popular raster algorithm also needs to use calibration parameters such as focal length when dividing the grid, otherwise the divided grid will deviate, and the eigenvector will change accordingly, so that it cannot be correctly identified
If the star sensor encounters a sudden situation in flight and the focal length changes, the raster algorithm will be greatly affected

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  • Method for recognising not gauged star map
  • Method for recognising not gauged star map
  • Method for recognising not gauged star map

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] The main idea of ​​the present invention is: extract the feature vector of the navigation star, set up a navigation star pattern library based on raster data storage; extract the feature vector according to the pattern of the navigation star from the observation star map, and then use the observation star map and the navigation star pattern library According to the initial matching result of the star to be selected, the star to be selected is determined, and the star to be selected is grouped according to the uniform division method of the celestial sphere, and the direction of the field of view is determined according to the sub-block attribution of the star to be selected.

[0032] Wherein, the extraction of the feature vector of the star map mainly uses the radial feature and the circular feature.

[0033] Fig. 1 is the realization flow diagram of star map re...

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Abstract

A non-labeled identifying method of star atlas includes picking up character rector of navigation star, setting up navigation star mode library according to grille storage, picking up character vector of observed star when star atlas identification is carried out, carrying out match in navigation star mode library according to picked up character vector to confirm star to be selected, grouping stars to be selected and confirming visual filed direction according to attribution of star to be selected.

Description

technical field [0001] The invention relates to a star map recognition technology, in particular to a non-calibration star map recognition method. Background technique [0002] The star sensor is an attitude measurement component widely used in aerospace vehicles, and it is an important part of the work of the star sensor to realize the recognition of the observed star map. The so-called star map recognition is to match the star map observed by the star sensor with the navigation star map in the existing navigation star catalog to determine the corresponding relationship between the observed star and the navigation star. The existing star map recognition algorithm must rely on the imaging model of the star sensor and the parameters of the imaging system. For example, the current popular recognition algorithm based on angular distance uses the focal length of the star sensor lens and the principal point position of the image plane to calculate the angle. distance, which requ...

Claims

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Application Information

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IPC IPC(8): G01C21/02G01C11/04G01V8/10
Inventor 张广军杨建江洁
Owner BEIHANG UNIV
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