Electromagnetic ray tracing method for triangular section ray tube based on bin projection
An electromagnetic ray, triangle technology, applied in the field of electromagnetic scattering simulation analysis, can solve problems such as time-consuming calculation
Active Publication Date: 2018-02-23
北京博奥瑞科技有限公司
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Problems solved by technology
Generally speaking, the shape of the target to be calculated is irregular, so many ray tubes do not intersect with the target, but it is still necessary to intersect with the surface element during the calculation process, which consumes a lot of calculation time
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[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0048] like figure 1 As shown, a method for tracing electromagnetic rays of a triangular-section ray tube based on panel projection in the present invention comprises the following steps:
[0049] Step 1: Divide the target surface into triangular surface elements: Divide the target surface to be calculated into many triangular surface elements for approximation. The advantage of using triangular surface elements is that the mesh division is more flexible, and any three vertices are on the same plane, which is convenient for subsequent Integral calculation of physical optics.
[0050] Step 2: Determine the orientation of the triangular bins, and divide them into bright bins and dark bins: judge their orientation according to the normal direction of the bins, the bins whose normal direction faces the direction of the incident electromagnetic w...
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An electromagnetic ray tracing method for a triangular-section ray tube based on panel projection, the steps are as follows: 1. Divide the target surface into triangular panels to approximate; 2. Determine the orientation of the panel, and the normal orientation of the panel is called a bright panel , the back is the dark bin; 3. Make occlusion judgments between the bright bins, and remove the occluded bright bins; 4. Set the plane that passes through the origin and is perpendicular to the incident direction, called the projection plane; The surface element is projected to the projection surface, and the projection triangle is used as the cross section to form a ray tube along the incident direction of the electromagnetic wave; 6. Judging the intersection of the ray tube and the surface element of the target surface, calculating the reflected ray, and then calculating the ray tube formed by each reflection RCS, the first reflection surface is the bright surface element that forms the ray tube; 7. The RCS formed by the reflection of the ray tube is superimposed to obtain the total RCS. This method associates the ray tube with the target surface element, and eliminates the error caused by the intersection of the traditional rectangular ray tube and the triangular surface element.
Description
1. Technical field [0001] The invention discloses an electromagnetic ray tracing method for a triangular-section ray tube based on panel projection, belonging to the field of electromagnetic scattering simulation analysis. 2. Background technology [0002] The ray tracing method is an electromagnetic simulation method for calculating the electromagnetic scattering in the high-frequency region of the target. The main method is to divide the incident wave into many ray tubes, track the reflection of each ray tube on the target surface, and the reflection direction of the ray tube on the target surface , amplitude and phase are calculated based on geometric optics. Every time the ray tube irradiates the target surface, electromagnetic scattering will be formed, and the electromagnetic scattering formed by all the ray tubes on the target surface will be superimposed to obtain the total electromagnetic scattering, and then the radar cross section (RCS) of the target can be obtain...
Claims
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IPC IPC(8): G06F19/00
Inventor 姬金祖马云鹏黄沛霖孙康文
Owner 北京博奥瑞科技有限公司