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Quick matching and recognition method for star tracking apparatus

An identification method and technology of star tracker, applied in the field of astronomical navigation, can solve the problems of RISC processor with large amount of calculation, meaningless comparison, large distance, etc., to improve the speed and accuracy, speed up, and reduce the amount of calculation. Effect

Inactive Publication Date: 2006-12-20
BEIHANG UNIV
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Problems solved by technology

[0012] (2) The calculation of its distance is based on the square sum square root operation, which requires a large amount of calculation in the RISC processor adopted by the star tracker;
[0013] (3) from image 3 We can see that the distance between the star 7′ in the field of view at the current moment and the stars 3, 4, 6, 9, and 10 at the previous moment is relatively large, and the comparison between them is meaningless. It is unnecessary time-consuming work

Method used

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  • Quick matching and recognition method for star tracking apparatus
  • Quick matching and recognition method for star tracking apparatus
  • Quick matching and recognition method for star tracking apparatus

Examples

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Embodiment

[0071] For an example of the specific implementation process, see the section "Specific Implementation" above. This example is aimed at Figure 4 , describes the entire process of matching and identification in detail, including the sorting of all stars in the field of view at the current moment, the position estimation of all stars in the field of view at the previous moment and the sorting of the estimation results, and the matching of the two sorting results process.

[0072] Steps tracked

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Abstract

The invention discloses a modified mating method of star tracer in the astronomical navigational technological domain, which comprises the following steps: collating stars of present time and spot according to X coordinate position to generate sequence A; estimating the traced star of last time and spot in the position of present visual field; collating the traced star position to generate sequence B; proceeding mating identification for sequence A and B.

Description

technical field [0001] The invention belongs to the technical field of celestial navigation and relates to the improvement of a star tracker matching method. Background technique [0002] The star tracker is the main equipment of the celestial navigation system, which is an instrument integrating optics, mechanics, electronics and real-time image processing technology. It obtains the image information of the star through the CCD or CMOS image sensor, and then processes the image information in real time, including precise positioning of the center of the star, star map recognition, fast tracking and accurate attitude calculation, and outputs attitude information to control the attitude of the aircraft. Real-time tracking is the main working mode of the star tracker, and its tracking speed is one of the main indicators of the star tracker. A very important issue in the star tracking process is: how to quickly identify the stars in the current field of view based on the infor...

Claims

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Application Information

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IPC IPC(8): G01C21/24B64G1/10B64G1/24
Inventor 江洁张广军李霄杨建
Owner BEIHANG UNIV
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