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

Method for identifying triangular star map

A star map recognition and triangle technology, applied in the direction of integrated navigator, etc., can solve the problems of redundant matching, poor noise robustness, low recognition rate, etc., achieve good robustness, increase recognition rate, and speed up search Effect

Inactive Publication Date: 2012-11-21
BEIHANG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention proposes a triangle star map recognition method, which solves the problems of poor robustness to noise, many redundant matches, and low recognition rate existing in the traditional triangle star map recognition method

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
  • Method for identifying triangular star map
  • Method for identifying triangular star map
  • Method for identifying triangular star map

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0053] The present invention proposes a triangle star pattern recognition method, such as figure 1 As shown, it specifically includes the following steps:

[0054] Step 1: Create a navigation database:

[0055] (1) construct characteristic triangle;

[0056] In the basic star library, select any one of the stars as the main star, and within the radius r of the main star, select the two stars closest to the main star as the neighboring star A and the neighboring star B, where r satisfies br≤r≤pr, Among them, br is the minimum value of the radius range of the main star, pr is the maximum value of the radius range of the main star, and pr≤1.5r max , r max is the field radius of the star sensor, and the field angle of the star sensor is 12°×12°, then the field radius r of the star sensor max is 6°, then r is preferably 1.5°≤r≤9°, and the self-radius ...

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 a method for identifying a triangular star map, and belongs to the field of navigation, guidance and control of spacecraft. The method comprises the following steps of: 1, establishing a navigation database, namely constructing characteristic triangles, calculating a plane unit normal vector, solving an optimal projection principal axis and projection point values, and normalizing magnitude; 2, forming an observation triangle; and 3, searching a characteristic triangle which is most matched with the observation triangle from the navigation database, sequentially retrieving a projection point value block index stable, a characteristic triangle table and a magnitude normalizing table in a hierarchical retrieval mode, and finishing the matching of the observation triangle. The method for identifying the triangular star map solves the problems of low noise robustness, more redundant matching and low identification rate of the conventional method for identifying thetriangular star map, obviously improves the search speed of the navigation database, reduces redundant matching, improves the identification rate, and has higher noise robustness.

Description

technical field [0001] The invention belongs to the field of spacecraft navigation, guidance and control, and in particular relates to a triangle star pattern recognition method. Background technique [0002] The star sensor is an important part of the astronomical navigation system. The star map recognition method is the core algorithm of the star sensor. Through the star map recognition, the attitude information of the carrier can be quickly and accurately obtained. The all-day autonomous star map recognition method with high accuracy has important theoretical and practical significance. [0003] As early as 1997, Padgett C et al. proposed the initial triangular star map identification method, using the three angular distances of the triangle for matching, the observation triangle is composed of any three stars in the field of view, according to the three angles of the observation triangle If the error corresponding to the three pairs of angular distances is within a set ...

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 Patents(China)
IPC IPC(8): G01C21/24
Inventor 杨静伍玲玲
Owner BEIHANG UNIV
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