Microsatellite formation autonomous relative navigation method based on array antenna

Abstract

The present invention discloses a microsatellite formation autonomous relative navigation method based on an array antenna. The microsatellite formation autonomous relative navigation method comprises: 1) installing an array antenna as a receiving end on a main spacecraft, respectively installing a single antenna as a transmitting end on each subordinate spacecraft, establishing the orbital coordinate system and the proprio-coordinate system of the main spacecraft, and constructing the transmitting signals of each subordinate spacecraft; 2) constructing the system equation of an extended Kalman filter; 3) determine the direction of arrival (DOA) of the line-of-sight (LOS) of the communication links between each subordinate spacecraft and the main spacecraft and the relative distances between each subordinate spacecraft and the main spacecraft; 4) constructing the measurement equation of the extended Kalman filter; 5) carrying out filtering on the relative positions and the relative velocities of each subordinate spacecraft by using the system equation and the measurement equation of the extended Kalman filter, and finally carrying out navigation according to the relative positions and the relative velocities of each subordinate spacecraft after the filtering. The method of the present invention has advantages of low cost, short time consumption, and high space utilization rate.

Description

technical field [0001] The invention belongs to the field of micro-satellite formation autonomous navigation, and relates to an array antenna-based micro-satellite formation autonomous relative navigation method. Background technique [0002] With the development of advanced microelectronics, data processing and storage, remote sensing and intelligent computing, modern small satellites have developed by leaps and bounds. Modern small satellites not only have a series of advantages such as small size, light weight, high technical content and short development cycle, but also have the advantages of adopting standardized star and modular design technology, mass production and storage on the assembly line, and convenient mobile launch. And distributed constellations can be used, or new technological achievements such as artificial intelligence can be introduced, and intelligent constellations can be used to complete complex tasks, even tasks that cannot be completed by large sat...

AI Technical Summary

Problems solved by technology

There is also a camera-based relative navigation method, which uses the identification and tracking of feature points in the image captured by the airborne camera for relative navigation. Conditions also require that this method fails in a dark environment, and the space utilization rate is poor

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