Autonomous star recognition method based on combination mode

A technology combining patterns and recognition methods, applied in the field of navigation, can solve problems such as low recognition rate and slow recognition speed

CN104776845AInactive Publication Date: 2015-07-15XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-07-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an autonomous star recognition method based on a combination mode. The feature of a combined main star in the combined mode of a radial mode and an encoding mode is adopted as the feature vector of the main star. In the recognition process, the search range of the main star in a navigation star feature library is reduced through an encoded value corresponding to the main star, the feature vector of the main star is matched and compared with vectors in the navigation star feature library, and autonomous recognition of the star is completed. The combination mode of the main star has horizontal movement and rotation invariance, and the high recognition rate is achieved, so that the method is more suitable for autonomous recognition of the star. Meanwhile, high star recognition speed is achieved, and the sensitivity of a system can be improved.
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Description

technical field

[0001] The invention belongs to the technical field of navigation, and in particular relates to an autonomous star identification method based on a combined pattern. Background technique

[0002] In celestial navigation and positioning, the positioning and identification of stars in the sky can effectively determine the direction information of the aircraft; based on scientific research and hardware cost considerations, the autonomous star tracker is regarded as the first choice for attitude measurement equipment on most aircraft; An autonomous star tracker can automatically identify stars and calculate the attitude of the aircraft; the accuracy of star identification directly affects the accuracy of the attitude of the aircraft. Therefore, in the star sensor, effective and accurate star identification algorithm is very critical.

[0003] In the past few decades, many scholars have devoted themselves to the research of star recognition algorithm, and the sta...

Examples

Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Such as figure 1 As shown, the autonomous satellite identification method based on the combination mode of the embodiment of the present invention comprises the following steps:

[0051] S101: Calculate the coordinates of the navigation star in the star map image: calculate the coordinates of the navigation star in the star map image according to the coordinates of the navigation star in the inertial coordinate system and according to certain conversion r...