Spacecraft constellation decentralized autonomous navigation method using inter-satellite tracking

Abstract

The invention discloses a spacecraft constellation decentralized autonomous navigation method using inter-satellite tracking. The method comprises the following steps of: 1, initializing each sub-filter; 2, performing local state sampling by each sub-filter; 3, updating the time of each sub-filter; 4, establishing an inter-satellite communication link between spacecrafts and keeping tracking; 5, performing inter-satellite tracking observation on the spacecrafts between which the inter-satellite link has been established; 6, sharing the state sampling information of each sub-filter through the inter-satellite link; 7, performing local related measurement and sampling by each sub-filter; 8, updating the measurement by each sub-filter; 9, monitoring the performance of each sub-filter, and judging whether each sub-filter runs normally or not; 10, outputting the measurement updating results serving as local navigation estimation in the step 8 by each sub-filter, returning to the step 1, and starting executing the next calculation cycle; and 11, outputting the time updating results serving as local navigation estimation in the step 3 by each sub-filter, returning to the step 1, and starting executing the next calculation cycle.

Description

technical field [0001] The invention relates to a space vehicle constellation decentralized autonomous navigation method using inter-satellite tracking, which is an information processing method for realizing multi-spacecraft constellation decentralized autonomous navigation. This method has been effectively applied in multi-spacecraft missions with various orbit configurations for autonomous navigation and orbit determination based on inter-satellite measurements, and can also be applied in constellation satellite-ground joint orbit determination systems after improvement. The invention belongs to the technical field of spacecraft autonomous navigation. Background technique [0002] In today's scientific exploration, technological application, and even military struggle, space activities are playing an increasingly important and even irreplaceable role. In various space programs, the mission mode of using multiple spacecraft to form an overall space system can be achieved ...

AI Technical Summary

Problems solved by technology

Compared with the centralized algorithm, this kind of method handles the problem of distributed observation well, but because the filtering algorithm has not been completely decentralized, each related spacecraft in the group needs to update the global state in turn, and there are Disadvantages such as a large amount of calculation for a single spacecraft, increased inter-satellite communication traffic, and low system fault tolerance

[0011] To sum up, decentralized cooperative operation has become an important development trend of constellation autonomous navigation system based on inter-satellite measurement, and will constitute the key link of its autonomous operation. However, there is no complete and practical decentralized method in terms of algorithm structure.

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