Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Autonomous star map identification method based on dimensionality reduction star catalogue

An identification method and star map identification technology, applied in the field of astronomical navigation, can solve the problems of large storage space, long operation time, and complicated calculation of the navigation star database, and achieve the goal of reducing the capacity of star catalogues, small capacity of star catalogues, and high recognition rate. Effect

Active Publication Date: 2020-01-21
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In short, there are three main problems in the current autonomous star map recognition algorithm: ① When the measurement noise changes, the robustness is poor; ② The storage space occupied by the navigation star library is large; ③ The calculation is complicated and the operation time is long

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Autonomous star map identification method based on dimensionality reduction star catalogue
  • Autonomous star map identification method based on dimensionality reduction star catalogue
  • Autonomous star map identification method based on dimensionality reduction star catalogue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] 1. Establish the observation star feature vector

[0032] Select the observation star o closest to the center of the field of view, and the nearest neighbor star a to the observation star o. Calculate the distance from other observed stars to the observed star o, take the observed star oa as the starting edge, calculate the geometric angle between other observed stars and oa with the star o as the vertex (according to the same rotation direction). Obtain the angular distance of each observation star from the observation star o and the angle of the distance oa to form a set of vectors (l 1 ,θ 1 ),(l 2 ,θ 2 ),…(l n ,θ n ). Calculate (l 1 ,θ 1 ),(l 2 ,θ 2 ),…(l n ,θ n ) projection distance d on l=θ 1 , d 2 ,... d n .

[0033] star distance l 1 and θ 1 For example, the calculation method is as follows:

[0034]

[0035]

[0036] and,

[0037]

[0038] (l 1 ,θ 1 ) projection distance d on l=θ 1 The calculation method is

[0039]

[0040] 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an autonomous star map identification method based on a dimensionality reduction star catalogue. Eigenvectors of an observation star is established, the star catalogue is established and matched, the eigenvectors of the observation star o are compared with eigenvectors of a navigation star one by one, and features of the navigation star are successfully matched with elements in the eigenvectors when the quantity of the successfully matched elements in the eigenvectors is maximum and is greater than a certain threshold; and if matching fails, a star which is next nearestto the observation star o is selected as an inter-star geometric angle calculation reference, and the eigenvectors of the observation star are obtained again and then are matched with eigenvectors inthe star catalogue.

Description

technical field [0001] The invention belongs to the technical field of celestial navigation, in particular to an autonomous star map recognition method based on dimensionality reduction star catalogs. Background technique [0002] The star sensor is a kind of high-precision astronomical navigation equipment, which has the advantages of high precision of attitude determination, strong autonomy and high reliability, and has been widely used in aerospace vehicles. Autonomous star map recognition is the key technology for star sensors to achieve autonomous attitude determination. Since the appearance of star sensors, autonomous star map recognition methods have been continuously studied. [0003] Autonomous star map recognition is to use the star information taken by the star sensor to identify stars in the all-sky area star catalog and determine the position of the stars in the inertial system. Therefore, the recognition can be completed without any attitude information. The ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C21/20G01C21/24
CPCG01C21/025G01C21/20G01C21/24
Inventor 踪华李冰翟雯婧姬晓琴
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com