High-precision medium body target scattering simulation method
A simulation method and target technology, applied in design optimization/simulation, climate sustainability, complex mathematical operations, etc., can solve problems such as good iterative performance, and achieve the effect of saving memory, improving calculation accuracy, and high precision
Active Publication Date: 2020-05-12
XIDIAN UNIV
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Problems solved by technology
And after the experiment, it was found that the iterative performance calculated by the method of the paper has reached a good level
However, the method of combining the source integral equation CSIE combined with the impedance boundary condition IBC can only be applied to conductors at present.
In the electromagnetic scattering problem, the scattering problem of the medium body is also very important. However, the relevant introduction and specific implementation method of applying this method to the scattering of the medium body cannot be found in the existing technical materials. If it is necessary to apply this method to the scattering of the medium body related problems, it is necessary to reorganize the implementation process of the method and re-deduce the relevant mathematical formulas
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[0041] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0042] refer to figure 1 , the implementation steps of this example are as follows:
[0043] Step 1, modeling the medium object.
[0044]This example is only for the calculation method after the grid data is read into after grid division. Therefore, for the meshing part, the existing modeling software such as: FEKO, HFSS, AutoCAD is directly used to carry out 3D modeling of the medium object, and the results are as follows figure 2 .
[0045] figure 2 For a cone with a bottom circular radius of 0.1 m and a height of 0.1 m, set the relative permittivity ε r =3.
[0046] Step 2, setting the direction and frequency of the incident wave.
[0047] This example is for figure 2 The direction and frequency of the incident wave of the model are set, that is, under the model coordinates, the Z axis is irradiated from top to bottom, the frequency of th...
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The invention provides a high-precision medium body target scattering simulation method, and mainly solves the problem that an existing CSIE equation cannot be used in medium body scattering. According to the scheme, the method comprises the steps that a half-SWG primary function is used for modeling a target model obtained after mesh generation; a magnetic flow source scattering part in a combined source integral equation is reserved, a volume sub-combined source integral equation is established, and the use of the volume sub-combined source integral equation is expanded from a conductor to amedium body; impedance boundary conditions only used for scattering field calculation of a good conductor target are used in a dielectric body, so that a current source and a magnetic current sourceexisting in the same small tetrahedron are associated; a matrix vector expression is generated by using a discontinuous Galerkin method, and an impedance matrix is converted in the matrix vector expression into a form which occupies a small memory and is easy to solve to solve the matrix vector expression by using a generalized minimum residual error method to obtain the RCS of the bistatic radarscattering cross section. The method is high in precision and small in occupied computer memory, and can be used for flight equipment and antenna design.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic scattering, in particular to an electromagnetic scattering simulation method of a dielectric body, which can be used in the design of flight equipment and antennas. [0002] technical background [0003] The inventive method uses the combined source integral equation CSIE to calculate the radar cross section. In the electromagnetic simulation method, the calculation equation widely used to calculate the electromagnetic scattering of conductors is the combined field integral equation CFIE. Because after using the method of moments, there is basically no non-convergence when using GMRES to solve the matrix when there is no problem with the mesh division of the object, and the calculation accuracy is relatively good. The combined source integral equation CSIE has higher calculation accuracy than the joint field integral equation CFIE. The reason why it is not widely used is that it requires m...
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IPC IPC(8): G06F30/20G06F17/13
CPCG06F17/13Y02A90/10
Inventor 杜家豪安翔吕志清刘义乐
Owner XIDIAN UNIV