Optimal selection method of navigational stars of star map simulator based on star density

A dense, navigation star technology, applied in the field of positioning, navigation and control, and autonomous navigation star sensors, which can solve problems such as complex solutions

Active Publication Date: 2014-11-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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At the same time, the standard deviation of the navigation star database obtained by this method is the smallest, and the distribution is the most uniform, which is supe

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  • Optimal selection method of navigational stars of star map simulator based on star density
  • Optimal selection method of navigational stars of star map simulator based on star density
  • Optimal selection method of navigational stars of star map simulator based on star density

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[0049] Below in conjunction with the accompanying drawings, the star map emulator navigation star optimization method (ITSI navigation star optimization method) based on star density proposed by the present invention will be described in detail.

[0050] As shown in Figure 1 (a) and (b), the present invention provides a star map emulator navigation star optimization method based on star density, at first the star list is processed, the effective data field is extracted, and related data processing is carried out , get the six data volumes corresponding to each star (number, magnitude, right ascension, declination, right ascension proper, declination proper), and then carry out proper motion, precession and chapter for the extracted right ascension and declination values dynamic correction. Then, according to the given boresight direction and the size of the field of view, the stars within the field of view are extracted, and an observation star library is established. Then, o...

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Abstract

The invention discloses an optimal selection method of navigational stars of a star map simulator based on star density. The optimal selection method comprises the following steps: firstly, processing a star catalogue, extracting effective data fields, carrying out related data processing to obtain six pieces of data corresponding to each fixed star, and then performing proper motion, precession and nutation correction on extracted right ascension and declination values respectively; secondly, according to given optical axis orientation and the size of a field range, extracting fixed stars in the field range and establishing an observational star database; thirdly, on the basis of the observational star database, performing image surface partition and star density calculation respectively by use of an ITSI (Information Technology System Infrastructure) optimal selection method of the navigational stars, and satisfying a set navigational star threshold, and finally realizing the optimal selection of the navigational stars and establishing a navigational star database. The method is relatively simple, but the navigational star database obtained by use of the method is relatively low in standard deviation and relatively even in distribution, and both efficiency and effect are achieved; the established navigational star database is reasonable and significant for smooth implementation of star map matching.

Description

technical field [0001] The invention belongs to the technical field of positioning navigation and control, in particular to the field of autonomous navigation star sensors. Background technique [0002] Autonomous navigation star sensor is a hotspot in star sensor research. In the development process of the autonomous star sensor, the performance of the star map simulator used to test the performance of the star sensor is very important, and its performance directly affects the quality of the autonomous star sensor. The selection of navigation stars is an important step in star map simulation and the premise of effective star map identification, mainly to achieve uniform distribution of navigation stars and reduce the redundancy of navigation star library. The traditional navigation star optimization method of star map simulator, when the field of view is large, the redundancy of navigation stars is also large. [0003] At present, there are mainly two types of methods tha...

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 陈雪芬康国华周琼峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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