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A Method for All-Spherical Fast Star Map Recognition by Star Sensor

A star map recognition and star sensor technology, applied in character and pattern recognition, instruments, astronomical navigation, etc., can solve the problems of large navigation feature database, long recognition time, low recognition rate, etc., and achieve good robustness, The effect of high recognition success rate and reduced storage space requirements

Active Publication Date: 2020-05-19
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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Problems solved by technology

This method is simple to calculate, but the required navigation feature library has a large capacity, and there are many problems in the matching and recognition, such as redundancy, long recognition time, and low recognition rate.

Method used

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  • A Method for All-Spherical Fast Star Map Recognition by Star Sensor
  • A Method for All-Spherical Fast Star Map Recognition by Star Sensor
  • A Method for All-Spherical Fast Star Map Recognition by Star Sensor

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention more clear, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to help the understanding of the present invention, and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0024] The present invention provides a star sensor all-celestial rapid star map recognition method, which mainly includes two parts: building a navigation feature library and a star map recognition and matching method, see the star map recognition method flow figure 1 shown, including the following steps:

[0025] Step 1. Const...

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Abstract

The invention discloses a method for fast star map recognition of the whole celestial sphere by a star sensor, which includes constructing a navigation feature library of the shape factor and angular distance value of the navigation triangle; according to the number of observed stars in the field of view of the star sensor, select the best The four observation stars form two target observation triangles; calculate the shape factor and angular distance value of the two target observation triangles, match them with the navigation feature library, and obtain the navigation triangle to be matched; according to the Navigate the triangle information, generate a reference star map of a local sky area, and perform star point matching on the reference star map and the current observation star map in four steps. It can reduce the requirement on the storage space of the navigation feature library. In the process of matching and recognition, the "unique" navigation triangle can be quickly found according to the characteristics of the observation triangle, which solves the problem of redundant navigation triangles in the traditional triangle method. The matching recognition time is short, the recognition success rate is high, and the robustness is good.

Description

technical field [0001] The invention belongs to the technical field of attitude sensor measurement, and relates to a method for fast all-celestial star map recognition of a star sensor. Background technique [0002] At present, there are many kinds of attitude sensors, and the performance of the star sensor is the most prominent. It has the advantages of low power consumption, light weight, strong autonomy, good dynamic performance, and high precision. It has been widely used in satellites, missiles and other space technology fields. The star map recognition technology of the sensor is a key technology to complete the attitude measurement task of the spacecraft, which directly affects the ability of the star sensor to navigate autonomously throughout the day. [0003] The star sensor is a high-precision space attitude measurement device with the equatorial inertial system as the reference system and the stars as the source of navigation information. By taking images of stars...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02G06K9/00
CPCG01C21/02G06V30/422
Inventor 陆壮志周鑫万志江王安迪王伟
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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