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Spacecraft navigation method combining ground image and fixed star light aberration measurement

A navigation method and spacecraft technology, applied in ground navigation, astronomical navigation, mapping and navigation, etc., can solve the problems of heavy measurement and control burden, weak satellite survivability, and high operating cost, and achieve continuity, high observation reliability, and high reliability. Background star rich effect

Active Publication Date: 2021-06-25
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

At present, spacecraft navigation and orbit determination mainly rely on ground-based and space-based means, but considering that these means are often limited by factors such as heavy measurement and control burden, high operating costs, and weak survivability of satellites under special circumstances, the development of autonomous spacecraft Navigation has become one of the development trends of future aerospace

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  • Spacecraft navigation method combining ground image and fixed star light aberration measurement
  • Spacecraft navigation method combining ground image and fixed star light aberration measurement
  • Spacecraft navigation method combining ground image and fixed star light aberration measurement

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] Such as figure 1 with figure 2 As shown, the present invention is a spacecraft navigation method combining ground images and stellar aberration measurement, comprising the following steps:

[0037] S1: Preprocess the remote sensing image and background star image data, and match it with the standard database.

[0038] The autonomou...

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Abstract

The invention relates to a spacecraft navigation method combining ground image and fixed star light aberration measurement. The method comprises the following steps: S1, preprocessing remote sensing image data and background fixed star image data, and matching with a standard database; S2, based on the preprocessing and matching result of the remote sensing image data, establishing a navigation observation model taking a ground feature scenery sight vector as an observed quantity; S3, establishing a navigation observation model based on fixed star light aberration measurement according to a matching result of the background fixed star image data; S4, establishing a navigation state equation based on an orbit dynamics model; and S5, estimating the navigation state quantity in real time by adopting an extended Kalman filtering algorithm according to the constructed navigation measurement equation and navigation state equation. According to the invention, earth imaging navigation and navigation based on light aberration observation are combined, and the method has the advantages of high observation reliability and high precision.

Description

technical field [0001] The invention belongs to the technical field of spacecraft autonomous navigation, and in particular relates to a spacecraft navigation method combined with ground images and stellar aberration measurement. Background technique [0002] With the development of aerospace technology, various space exploration missions put forward higher requirements for spacecraft navigation technology. At present, the navigation technology for spacecraft mainly includes three categories: ground-based navigation based on ground station measurement and control network, space-based navigation based on space navigation constellation, and autonomous navigation based on navigation sensors carried by spacecraft itself. At present, spacecraft navigation and orbit determination mainly rely on ground-based and space-based means, but considering that these means are often limited by factors such as heavy measurement and control burden, high operating costs, and weak survivability o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C21/04G01C21/20
CPCG01C21/005G01C21/025G01C21/04G01C21/20
Inventor 李木子孙俊彭杨陈文王兆龙
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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