Rapid triangle star map recognition method

A star map recognition and triangle technology, applied in the field of celestial navigation, can solve the problems of large storage space, slow recognition speed, redundant recognition and high misrecognition rate, and achieve the effect of saving storage space, small amount of calculation, and shortening the recognition time

Inactive Publication Date: 2009-05-27
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of slow recognition speed, high redundant recognition and misrecognition rate in the current triangle star map recognition method,

Method used

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  • Rapid triangle star map recognition method
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  • Rapid triangle star map recognition method

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Embodiment Construction

[0025] The present invention is further described in detail through the following examples.

[0026] 1. Determine the identification features and formulate the navigation star library.

[0027] In the process of triangle identification, the side refers to the feature of star-to-star angular distance, which is the main identification feature. Since the brightness feature of a star is easily affected by the outside world, there is a large error between the observed magnitude and the apparent magnitude of a single star. After the magnitude is calibrated, the relative magnitude difference between stars in the observed star map should be relatively stable. During the identification process, the relative magnitude difference between two stars is added as an auxiliary identification feature. When there are common edges between triangles, much of the same information is stored, and this redundancy increases the requirements on the hardware system. In order to avoid this redundancy, t...

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Abstract

The invention relates to a fast triangle star atlas identification method in astronomy navigation technology field, which includes steps: 1. using star angular distance as a main identification characteristic, using relative magnitude difference of two stars as a auxiliary identification characteristic to determine star atlas identification characteristic quantity, using the star angular distance between two stars, the relative magnitude difference and star number of the two stars composing the star pair as storage basic element, hypothesizing star sensor view field diagonal distance to be d, storing all basic elements with diagonal distance less than or equal to d, constructing a navigation star database and storing the same; 2. extracting observed stars in a observation star atlas, ordering the star from light to dark according to brightness, constructing a observation triangle to be identified; 3. performing triangle identification by utilizing the method; and 4. verifying. The method realizes fast identification of star triangle in the observation star atlas, has advantages of small amount of calculation, stronger fault tolerance capability, faster identification time and navigation database with smaller capacity, and reduces storage pressure of redundant data to hardware system.

Description

technical field [0001] The invention belongs to the technical field of celestial navigation, and relates to a fast recognition method for a triangular star map, which can be used for fast star map recognition and rough attitude determination in a system using a star sensor as a celestial navigation component. Background technique [0002] The large field of view astronomical positioning system based on star sensors is one of the development directions of modern astronomical navigation systems. It uses the accurate and indestructible natural celestial bodies and stars as references to determine the orientation information of the aircraft. The star sensor has the characteristics of good concealment, wide application range, high reliability, high precision, independent all-weather work and no enemy interference and damage during wartime. The use of star sensors to determine the attitude of the aircraft is the most accurate method among the current methods, and it has increasing...

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Application Information

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IPC IPC(8): G01C21/02
Inventor 张磊何昕魏仲慧刘岩俊赵宝庆
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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