Walker constellation configuration maintaining method and terminal equipment

Abstract

The invention discloses a Walker constellation configuration maintaining method and terminal equipment. The Walker constellation configuration maintaining method comprises the following steps: determining a first offset amount of each satellite in a simulation time period according to Walker constellation parameters; according to the first offset amount, performing first offset on each satellite to obtain a Walker constellation after the first offset; determining a second offset amount of each satellite in the simulation time period according to the Walker constellation parameters after the first offset; and superposing the first offset amount and the second offset amount, and carrying out second offset on each satellite so as to maintain Walker constellation configuration. According to the method, the offset amount during the first offset is obtained through fitting according to the constellation relative drift amount during non-offset, and then the second offset amount is obtained through fitting according to the relative drift amount after the first offset, so that the influence of residual terms is eliminated, the relative drift is greatly reduced, and the method has the advantages of simple operation and high constellation configuration maintenance precision; and meanwhile, since each satellite is only biased during initial orbit injection, subsequent fuel consumption is not needed, fuel of the satellites is saved, and the service life of the satellites is prolonged.

Description

technical field [0001] The invention relates to a Walker constellation configuration maintenance method and terminal equipment, and belongs to the technical field of Walker constellation configuration stability analysis. Background technique [0002] During the operation of the satellite constellation, due to the influence of various perturbations, the relative positions of the satellites will gradually drift, and then gradually deviate from their nominal orbits, resulting in changes in the overall structure of the constellation. Accumulation of such changes to a certain extent will destroy the geometric configuration of the constellation, resulting in a significant decline in the performance of the constellation. [0003] The Walker constellation is widely used for its uniform revisit characteristics and good coverage of latitude zones around the world. Typical Walker navigation constellations include the GPS global positioning navigation system of the United States, the Ga...

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Problems solved by technology

[0004] At present, domestic and foreign studies on the configuration maintenance of satellite constellations include: Chen Yu et al., based on the in-orbit measured data, controlled the relative drift of the phase angle by manoeuvring satellites with a relatively small relative drift of the cumulative phase difference, which can make the relative phase angle drift within a year The drift is maintained within the threshold of ±5°, but the number of satellites in the constellation of this method is small and the threshold is too large, which cannot meet the requirements for maintaining the configuration of the Walker constellation with a large number of satellites

In foreign literature, Shah et al. used the Lyapunov control method to calculate the speed increment required for the absolute control and relative control of the constellation; Ulybyshev et al. used the linear quadratic controller to maintain the relative position between the stars in the constellation; Casanova et al. The initial parameter setting method to ensure the stability of the constellation configuration of the 2-dimensional lattice flower constellation under the influence of J2 perturbation, but the research is not applicable to the Walker constellation

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