A method of downloading and restoring high-precision on-orbit attitude information

An attitude information, high-precision technology, applied in attitude control, navigation through speed/acceleration measurement, combined navigator, etc., to achieve the effect of simple algorithm without affecting reliability

Active Publication Date: 2020-11-10
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a method for downlinking and restoring high-precision on-orbit attitude information. The time-sharing design of the spaceborne software, the extraction of core elements in the original data of satellite attitude information and the design of ground restoration methods meet the requirements of satellite high-precision attitude update rate and data accuracy for payload ground image registration

Method used

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  • A method of downloading and restoring high-precision on-orbit attitude information
  • A method of downloading and restoring high-precision on-orbit attitude information
  • A method of downloading and restoring high-precision on-orbit attitude information

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Embodiment

[0050] A certain satellite has two imported ASTRO10 star sensors, named star sensors a and b respectively. Due to product design characteristics, a single machine cannot provide the UTC time at the moment when the original quaternion is generated, so the system adds multiple clocks in the next key parameter extraction and package, and obtains the original quaternion of star sensors a and b through ground processing The UTC time of the generated moment.

[0051] 1. Odd and even beats respectively send RTS signals to star sensors a and b to request data, and receive the returned data;

[0052] 2. Extract the following key parameters:

[0053]1) The time difference △Ts between the system clock and the local clock within a single shot: the system clock represents the time of the on-board software, using UTC time, which is consistent with the GPS time. The local clock represents the time of the computer hardware system itself, and uses this time to record the moment of sending in...

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Abstract

The invention provides a high-precision on-orbit attitude information downloading and restoring method. Under the premise of not expanding on-board hardware resources, the original information and effective state words of a star sensor and an inertial reference unit, time stamp and the like are collected, downloaded and subjected to ground restoration at a frequency higher than a control cycle ofon-board software. The method is suitable for the case where a load has a higher update frequency requirement on satellite attitude, but is limited by the software operation cycle or lack of a fast download channel.

Description

technical field [0001] The invention relates to a method for downlinking and restoring high-precision on-orbit attitude information, and belongs to the technical field of on-board software design and attitude data application of satellite attitude control systems. Background technique [0002] With the development of civil aerospace technology and application requirements, the requirements for payload development technology and data processing are also getting higher and higher. The improvement of payload spatial resolution and image positioning accuracy not only puts forward requirements for its own technological development, but also requires the improvement of satellite-ground integrated processing technology. [0003] The satellite-ground integrated geometric correction processing technology is used to process the remote sensing data on the ground according to the platform attitude information, which can correct the influence of orbit, attitude, deformation and other fac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/20G01C21/16G01C21/24G05D1/08
CPCG01C21/165G01C21/20G01C21/24
Inventor 牛睿李利亮蔡陈生朱琦朱文山邵志杰
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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