A method for simulating potential of dielectric materials on the surface of geosynchronous orbit spacecraft

Abstract

The invention discloses a method for simulating the potential of a dielectric material on the surface of a spacecraft on a geosynchronous orbit. The method comprises the following steps that firstly a three-dimensional model of the spacecraft structure is established, and the charging potential of the dielectric material on the surface of the spacecraft on the geosynchronous orbit can be intuitively simulated; and secondly, secondary electrons and photoelectrons are added into the charged particle environment meeting the bi-maxwellian distribution, and the distribution of the charging potential on the surface of the spacecraft and the change relation of the average surface potential of the spacecraft along with the time are obtained by simulation. The method disclosed by the invention has the advantages that the wanted calculating accuracy is realized by the meshing degree, the simulation process is simple and is easy for implementation, and the simulation of any three-dimensional spacecraft structure under the synchronous-orbit plasma environment can be realized.

Description

technical field [0001] The invention relates to the calculation of the charging potential of any dielectric material on the surface of a geosynchronous orbit spacecraft with an arbitrary structure, belongs to the field of space calculation, and in particular relates to a method for simulating the potential of a dielectric material on the surface of a geosynchronous orbit spacecraft. Background technique [0002] The height of geosynchronous orbit (GEO) is about 6 radii of the earth. Under normal circumstances, the entire orbit runs through the high-energy electron ion cloud of the solar wind (often causing geomagnetic substorms), the outer Van Allen radiation belt and the low-energy and high-density plasma in the shadow area of ​​the earth. environment. Since the geosynchronous orbit runs through different regions, the energy and temperature of the plasma in different regions are greatly different, thus forming an extremely harsh charging environment for geosynchronous orbit...

AI Technical Summary

Problems solved by technology

At the same time, the electromagnetic pulse generated by the discharge will interfere with the communication of spacecraft and the operation of electronic equipment on the planet.

[0004] At present, there are some spacecraft surface charging simulation methods in use in the world, such as the surface charging simulation method of NASA in the United States and the spacecraft plasma interaction simulation method of ESA. These simulation methods are similar in principle, but there are some differences in use and function. , but the core codes of these simulation methods are not disclosed and the simulation accuracy cannot be evaluated

There are very few domestic studies in this area, and the existing simulation methods have large errors, and most of them use one-dimensional or two-dimensional simulations, and the simulation of the potential of dielectric materials on the surface of synchronous orbit spacecraft has not been reported yet.

Images