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Star map recognition navigation triangle library construction method and device

A navigation triangle and star map recognition technology, applied in the field of star sensors, can solve the problems of no solution, the overall performance cannot meet the measurement requirements, and the recognition rate is reduced.

Active Publication Date: 2021-10-29
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for the 5.4° field of view and 7th-magnitude star conditions, use this method to set the parameter n s =10 There are about 1209K triangles generated, which cannot meet the storage space requirements of practical applications
If the parameter n of the brightest star point in each star map is adjusted s = 5, the number of triangles drops to 224K, but its recognition rate under various noise interference also drops, and the overall performance cannot meet the measurement requirements
[0005] For the above problems, no effective solution has been proposed

Method used

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  • Star map recognition navigation triangle library construction method and device
  • Star map recognition navigation triangle library construction method and device
  • Star map recognition navigation triangle library construction method and device

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Embodiment 1

[0038] Figure 13 It is a flow diagram of a star diagram identifier for navigation triangle library according to an embodiment of the present invention, such as Figure 13 As shown, the method includes the following steps:

[0039] Step S1302, acquire the triangular dimensional shape and quantity in different direction fields.

[0040] Step S1304, construct a triangular density distribution model based on the triangular size shape and quantity.

[0041] Step S1306, based on the triangular density distribution model and a triangle star, a triangular utilization model is generated.

[0042] In step S1308, the low-utilization rate triangle in the triangular utilization model is removed to obtain a triangular library.

[0043] Optionally, the triangular density distribution model includes: obtaining a star point effective area D i The definition is as follows: Medium I is a star, S i Star vector, Set of direction vector in three-dimensional space, θ fov For the angle of view; the ste...

Embodiment 2

[0119] A star diagram identifies a navigation triangular library build device of the embodiment of the present invention, which includes:

[0120] The module 1400 is used to obtain a triangular dimensional shape and number in different direction fields.

[0121] The density module 1402 is used to construct a triangular density distribution model based on the triangular size shape and quantity.

[0122]The utilization rate module 1406 is used to generate a triangular utilization model according to the triangular density distribution model and a triangle star or the like.

[0123] Remove module 1408 for reject the low utilization triangle in the triangular utilization model to obtain a triangular library.

[0124] Optionally, the density module includes: acquiring unit for acquiring a star point effective area D i The definition is as follows: I is an asterisk, S i Star vector, Set of direction vector in three-dimensional space, θ fov For the angle of view; the generating unit is ...

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Abstract

The invention discloses a star map recognition navigation triangle library construction method and device. The method comprises the following steps: obtaining the sizes, shapes and numbers of triangles in view fields in different directions; constructing a triangle density distribution model according to the sizes, the shapes and the number of the triangles; generating a triangle utilization rate model according to the triangle density distribution model and the fixed star magnitude corresponding to the triangle; and removing triangles with low utilization rates in the triangle utilization rate model to obtain a triangle library. The triangles in the celestial sphere are screened, the use efficiency of the storage space is improved, the matching degree is high, the recognition rate is increased, and the search efficiency is improved.

Description

Technical field [0001] The present invention relates to the technical field of star sensors, and in particular, a star diagram recognition navigation triangular library construction method and apparatus. Background technique [0002] With the continuous development of intelligent technology, people's lives, work, and learning are increasingly used in intelligent equipment, using intelligent scientific and technological tools, improve the quality of people's lives, increase people's learning and work efficiency. [0003] Star sensor is a high precision attitude measuring instrument. The instrument observes the measurement and calculation of the posture through the camera. Due to the high measurement accuracy, the measurement error does not have the advantages of time accumulation, and extensive applications are obtained in the aerospace sector of satellite, aircraft, missiles. Star Sensitors want to achieve high-precision measurements of gestures, not only high-performance lens an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C21/20
CPCG01C21/025G01C21/20
Inventor 江洁马岩张广军
Owner BEIHANG UNIV
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