Spacecraft orbit determination method based on data driving

Abstract

The invention discloses a spacecraft weighted orbit determination method based on data driving, and the method comprises the steps: enabling an orbit determination sample set Z consisting of a measurement data set X and a corresponding target spacecraft orbit set Y to be equal to {X, Y}, carrying out the weighting of the measurement data, and constructing an orbit determination weighted sample set; calculating a Gram matrix of the constructed orbit determination weighted sample set, and taking an elastic network as a loss function; and calculating an optimal estimation value of a spacecraft orbit determination result y (t) based on the Gram matrix. According to the method, a complex dynamic model does not need to be constructed, the idea of machine learning is introduced, and an unknown spacecraft orbit can be estimated by learning a large number of nominal orbits with existing tags; besides, the training data and the test data have the same noise characteristics, and the sample data is taken as the training data, so that the sensitivity of the orbit determination result to the measurement noise can be reduced, and the application prospect is wide.

Description

technical field [0001] The invention relates to a method for determining a spacecraft orbit, that is, a data-driven method for determining a spacecraft orbit, belonging to the field of spacecraft orbit dynamics. Background technique [0002] Spacecraft orbit determination is a fundamental issue in the field of spacecraft on-orbit measurement and control and space situational awareness, and has a wide range of application backgrounds. The so-called spacecraft orbit determination is to determine the orbital elements of the target based on the observation data of the unknown spacecraft (target) by ground-based or space-based observation equipment. The types of observation data include angle measurement (right ascension, declination), distance measurement, etc. information. The traditional orbit determination method needs to establish two models: one is the observation model describing the relative positional relationship between the spacecraft and the observation equipment, an...

AI Technical Summary

Problems solved by technology

The traditional method has high stability and maturity for dealing with the problem of orbit determination with a small amount of data. However, with the increasing frequency of space launch missions, the number of various spacecraft in space has increased significantly. When faced with massive observation data, traditional orbit determination Algorithms cannot make full use of the advantages of big data and dig deep into the relationship between data, and high-precision dynamic models are often complex and difficult to describe with analytical models

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