A space-based method for precise orbit determination using only angular differential evolution

Abstract

The invention aims at a problem of outer space noncooperative target precise orbit determination, and provides a space-based bearing-only measurement differential evolution one-time precise orbit determination method. In the method, based on thinking of least square batch processing orbit determination, a differential evolution algorithm is used to directly optimize an orbit determination objective function, thus, a situation of misconvergence or convergence errors, which may happen in a solving process of the direct least square batch processing method, can be avoided, moreover, a secondary orbit determination process required by general precise orbit determination is not needed, and an aim of one-time precise orbit determination can be realized. The method provided by the invention constructs a target orbit parameter vector based on an orbital kinetic equation description form, and under the situation of only using angle observation data, accurately solves an orbit spatial position and speed of the target at particular moment. A simulation experiment shows that an angle measurement sequence with precision of 5 seconds of arc is used, effective observation distance is in a range of 5000 kilometers, orbit determination precision of the method is as high as hundreds of meters order of magnitude, and the method can be used for a satellite orbit determination task.

Description

technical field [0001] The invention belongs to the technical field of satellite orbit determination, and in particular relates to a space-based differential evolution method for one-time precise orbit determination with only angle measurement. Background technique [0002] There are a large number of non-cooperative targets such as space debris and malfunctioning spacecraft in space. These targets have caused great safety hazards to the flight of spacecraft in space. Therefore, surveillance of non-cooperative targets is of great significance in space missions. Space surveillance can be divided into ground-based surveillance and space-based surveillance. Compared with ground-based surveillance (GBSS), space-based surveillance is not restricted by the location and number of observation stations, and more observation data can be obtained according to mission requirements. In space-based surveillance, optical imaging is the main observation method for non-cooperative targets....

AI Technical Summary

Problems solved by technology

Existing orbit optimization methods all have high requirements for initial value selection, and initial values ​​that deviate far from the real orbit data will cause inaccurate or even divergent orbit determination results.

In addition, the existing orbit optimization methods all perform linear approximation on the orbit transfer matrix during the operation process, which introduces calculation errors

The orbit optimization method also involves the normal matrix inversion problem in the solution process, which will also introduce calculation errors. When the normal matrix condition number is large, the calculation results will seriously deviate from the real value, and even fail to converge

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