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Space absolute orientation technology based on starlight observation

A spatial orientation and technical technology, applied in the direction of the combined navigator, etc., can solve the problems such as the decline of the reliability of the image sensing of the resolution tube, and achieve the effect of eliminating the initial condition error, improving the speed and accuracy, and improving the recognition effect.

Inactive Publication Date: 2011-02-09
韩春好 +1
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Problems solved by technology

The high-voltage power supply greatly reduces the reliability of image resolution tubes and other sensors, and high-voltage failures have occurred several times in previous flight accidents.

Method used

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  • Space absolute orientation technology based on starlight observation
  • Space absolute orientation technology based on starlight observation
  • Space absolute orientation technology based on starlight observation

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Embodiment Construction

[0034] (1) Interstellar direction observation

[0035]When taking pictures and observing, the prerequisite is to ensure that there are observable background stars in the field of view of the directional equipment, so as to obtain effective observations. In the case of a certain field of view of the observation instrument, the number of observable stars is not only related to the distribution of stars in the sky, but also affected by the background skylight. If the background skylight is too strong, the effective image information of the target star cannot be obtained. Here Mainly consider the influence of sunlight.

[0036] Assuming that the shading angle of the photographic observation equipment is Θ, when the angle θ between the interstellar pointing of the satellite and the direction of the sun is greater than Θ, the observation can be carried out. According to the navigation star catalog and the field of view of the observation equipment, the number of background stars at...

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Abstract

The invention solves the problem of space absolute orientation which is solved by a spacecraft by utilizing starlight observation and discloses three items of orientation star identification technologies, i.e. a star diagonal distance matching technology of a local sky area, a domain matching technology based on a forecast star map and a vector matching technology based on the forecast star map which systemically solve the technical difficult of orientation star identification in the starlight observation and the identification efficiency of the orientation star as well as three star map orientation balancing processing technologies, i.e. a parameter model processing technology based on coordinate increment, a coordinate increment parameter model processing technology with a distance restriction condition and a parameter model processing technology based on Euler rotation angle. The invention deduces the principles and the mathematic formulas of the models in detail, and improves the accuracy of the space absolute orientation of the spacecraft under different observation conditions based on prior information of satellite orbits, and the like.

Description

technical field [0001] The invention relates to technical fields such as aerospace, astrometry, navigation guidance and control. Space absolute orientation based on starlight observation is a technology that uses optical star sensors to measure celestial bodies and determine the absolute direction of space between satellites. It is mainly used for spacecraft attitude determination, astronomical navigation positioning, and integrated navigation. [0002] (1) Satellite attitude determination [0003] Satellite attitude determination refers to the process of measuring and calculating the orientation of a satellite in space. For example, when a satellite communicates or observes the ground, the antenna or remote sensor must point to the ground target; when the satellite performs orbit control, the engine must be aligned with the required thrust direction; when the satellite re-enters the atmosphere, the braking heat shield must be aligned with the oncoming airflow , these are re...

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Application Information

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IPC IPC(8): G01C21/24
Inventor 周建华韩春好蔡志武陈刘成
Owner 韩春好
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