High-precision spacecraft radiation light pressure modeling method

Abstract

The invention discloses a high-precision spacecraft radiation light pressure modeling method. According to the method, unified modeling is conducted on solar radiation pressure, earth radiation pressure and thermal radiation light pressure borne by a spacecraft. A three-dimensional structure of the spacecraft is finely represented by using a geometric prototype, the characteristic parameters of a surface material are given, and a three-dimensional model database of the spacecraft is constructed. A ray tracing method is used to simulate the interaction between radiation and the surface of the spacecraft to obtain the radiation light pressure acceleration expressed in a spacecraft body system, and therefore a radiation light pressure model of the spacecraft is established. The solar radiation pressure, the earth radiation pressure, the thermal radiation pressure and the uncertainty are output in the form of grids. A user only needs to execute simple bilinear interpolation on the basis of a grid file to obtain the high-precision radiation light pressure acceleration of the spacecraft in any attitude. As a high-precision non-conservative force modeling method, the method can perfect and improve the orbit dynamics model of the spacecraft, and further improve the orbit determination precision and the orbit prediction accuracy.

Description

technical field [0001] The invention belongs to the field of aerospace, in particular to a high-precision spacecraft radiation light pressure modeling method. Background technique [0002] Radiation light pressure, as a non-conservative force, is a mechanical effect produced by the momentum transfer when photons collide with the surface of an object. For Earth-orbiting spacecraft, the flow of radiation photons from the Sun, the Earth, and the spacecraft itself interacts with the surface of the spacecraft, creating radiation light pressure. Although the magnitude of the radiation light pressure is small, it will have a large impact on the orbit of the long-term orbiting spacecraft. Compared with the earth's gravity and the sun's and moon's gravity, which have relatively mature modeling technology and high precision, due to the influence of factors such as changes in radiation intensity, deviations in spacecraft attitude control, and aging of surface materials, the high-accur...

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Problems solved by technology

However, the above two methods have the disadvantages of large amount of calculation and long calculation time, and it is difficult to meet the fast and high-precision radiation light pressure modeling requirements of massive spacecraft.

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