HEO satellite-formation-flying automatic navigation method based on star sensor and inter-satellite link

A star sensor and satellite formation technology, applied in the field of HEO satellite formation flight autonomous navigation, can solve the problems of insufficient flight observation information and low navigation accuracy

Active Publication Date: 2017-04-26
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: The present invention aims at the problem of low navigation accuracy due to insufficient observation information of HEO satellite formation flight, and proposes an autonomous na

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  • HEO satellite-formation-flying automatic navigation method based on star sensor and inter-satellite link
  • HEO satellite-formation-flying automatic navigation method based on star sensor and inter-satellite link
  • HEO satellite-formation-flying automatic navigation method based on star sensor and inter-satellite link

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Embodiment Construction

[0078] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings;

[0079] Such as figure 1 As shown, the present invention is a HEO satellite formation flight autonomous navigation method based on star sensors and inter-satellite links. During the HEO satellite earth observation mission phase, HEO satellites use star sensors and inter-satellite links to perform inter-satellite observations , is a very suitable method for autonomous continuous relative observation of HEO satellites. It includes the following steps:

[0080] (1) Design the formation flight configuration and orbital parameters of HEO satellites (set as main star and sub-star) (including orbital semi-major axis a, orbital eccentricity e, orbital inclination i, ascending node right ascension Ω, argument of perigee ω, perigee time t p ), design the best installation orientation of the main star sensor to observe the sub-star;

[0081] (2) In the earth-c...

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Abstract

The invention discloses an HEO satellite-formation-flying automatic navigation method based on a star sensor and an inter-satellite link. The HEO satellite-formation-flying automatic navigation method includes the steps that two satellite-formation-flying structures and rail parameters are designed with HEO satellite earth observation as the task requirement, and according to a rail dynamic model of a primary satellite relative to a secondary satellite under a geocentric inertial coordinate system, an automatic navigation system state model is established; the theoretical light condition and the imaging condition which are required to be met when the secondary satellite is observed through the primary-satellite star sensor are proposed; the theoretical azimuth angle and the pitch angle of the secondary satellite relative to the primary satellite are calculated, the direction of the real optical axis of the primary-satellite star sensor and the theoretical direction are adjusted to be coincident, the secondary satellite is really observed, and an observation equation with the relative unit direction vector and the distance as observation quantities is established; the position and the speed of the satellite are estimated with Unscented Kalman filtering. By means of the HEO satellite-formation-flying automatic navigation method, errors of the relative positions of satellites can be effectively corrected, the relative navigation accuracy is improved, and the HEO satellite-formation-flying automatic navigation method is quite suitable for satellite-formation-flying automatic navigation.

Description

technical field [0001] The invention belongs to the field of spacecraft formation flight space measurement, in particular to an autonomous navigation method for HEO satellite formation flight based on a star sensor and an inter-satellite link. Background technique [0002] The orbital eccentricity of the High Elliptical Orbit (HEO) satellite is greater than 0.6, the perigee height is between 300 km and 1000 km, and the height at the apogee is higher than that of the geostationary orbit satellite (36000 km). HEO satellites have the characteristics of wide coverage area and long coverage time, so they have been applied in many fields, such as missile early warning, weather detection, navigation and positioning, space science exploration, etc. Early HEO satellites were mainly used in the military field, typical representatives of which include Russia's "Lightning" series of satellites; the United States' "Folding Chair" and "Bullion" satellites. It can be said that although th...

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Application Information

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IPC IPC(8): G01C21/24G01C21/20
CPCG01C21/20G01C21/24
Inventor 王鹏祝燕华
Owner SOUTHEAST UNIV
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