High Power Coupling Analysis Of Satellite Solar Wing Based On FDTD

With the development of aerospace technology,more and more attention has been paid to artificial earth satellite.Satellite as an important communication and navigation,scientific exploration and weather forecasting facilities plays a vital role in daily life.The satellite solar wing as important energy supply equipment of satellite provides the guarantee for the continuous work of the satellite.High power microwave weapon which is a new kind of weapon has made great progress in recent years.Finite difference time domain algorithm as a full wave algorithm has been widely used in various engineering fields because of its clear physical concept,easy implement and natural parallel.In view of the possibility that high power microwave weapon may attack the satellite in the future war,the finite difference time domain algorithm is used to analyze the high power coupling of the solar wing of the satellite under high power microwave.The main work of this paper consists of following four aspects:Firstly,introducing the process of solving the traditional FDTD method,the three dimensional FDTD discrete equations based on Yee grid are derived in detail.An improved perfectly matched layer(PML)technique based on transcendental function is studied.The method of setting the electromagnetic coefficient of the absorbing boundary in each direction is given.This method unifies the iterative formulas in the computational region and the absorbing boundary.Then,the technique of introducing plane wave is studied.Given the boundary treatment method of the total field and scattered field,and gives corresponding numerical examples to prove.Secondly,in order to solve the problem of complex multi-scale electromagnetic target generation,a new mesh generation technique suitable for Yee grid is developed by using the directed volume algorithm.Compared with the traditional mesh generation method,this method has a great improvement on the speed of mesh,and realizes the adaptive mesh of complex targets.At the same time,a set of mesh software is developed by using Microsoft basic class library technology,and the visualization of the mesh process is realized.Thirdly,the scattering problem in FDTD is studied.The calculation model of FDTD scattering is introduced,and the near far field extrapolation technology is derived in detail for calculating the electromagnetic field in the far zone.The process of calculating target radar cross section by near far field extrapolation technology is presented.Finally,the corresponding two dimensional and three dimensional numerical examples are given to prove the correctness of our program.Finally,High power coupling analysis of satellite solar panels under the action of high power microwave is studied.The coupling voltage,current and bistatic radar scattering cross section of single unit satellite solar wing,four units and sixteen units of satellite solar wing are analyzed at different incident direction,different forms of polarization and different rising edge of the high power impulse.In the end,the parallel FDTD based on Open MP is studied and compared with the traditional FDTD method,which proves that the parallel FDTD improves the computational efficiency.