SBR and PO technology-based strong scattering center calculation method

Abstract

The invention belongs to the signal characteristic control technical field and relates to an SBR and PO technology-based strong scattering center calculation method. The calculation method comprises the following steps that: hotspot calculation is performed through ray tracing and physical optics; a distribution diagram which can indicate the radar cross section (RCS) contribution of each surface element of a target surface is obtained; and strong scattering parts can be located through comparing hotspot diagrams. Compared with a low-frequency method, and according to the SBR and PO technology-based strong scattering center calculation method, SBR and PO methods are adopted to calculate target hotspots, and therefore, high efficiency can be realized; hotspot contribution is attached to the surface of a 3D model, and therefore, the strong scattering contribution parts can be analyzed intuitively. The SBR and PO technology-based strong scattering center calculation method of the invention can trace separated two-times and three-times strong coupling structures. Strong multiple-times scattering which is generated through the coupling of separated parts on a target is usually difficult to discover, while, hidden strong scattering structures can be found out through the hotspot diagrams.

Description

technical field [0001] The invention belongs to the technical field of signal feature control, and in particular relates to a method for calculating a strong scattering center based on SBR and PO technologies. Background technique [0002] The diagnosis of strong scattering centers is an extremely important link in the field of radar target signal characteristic control, and it is a key step for effective reduction of radar cross section. [0003] In the stealth design of radar scattering targets, it is often necessary to first analyze the radar scattering characteristics of the initially designed target model, and judge the strong scattering contribution parts of the initial target model according to the analysis data, and then take various RCS reduction measures for these parts. Therefore, the diagnosis of strong electromagnetic scattering structures in radar scattering targets is a key link in stealth design. [0004] At present, the diagnostic methods of strong scatteri...

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Problems solved by technology

But on the one hand, there is an essential difference between the two-dimensional radar image and the optical image. Under the action of the multiple scattering mechanism, the positions of some scattering centers obtained through the two-dimensional image are not consistent with the positions of the parts on the target surface that cause these scattering centers. Therefore, it is difficult to intuitively determine the part that causes strong scattering through the two-dimensional image; on the other hand, obtaining an omnidirectional two-dimensional image requires a lot of calculation and lacks quickness

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