关于降低下垫面背景下复杂物体的可见性

V. Khrychov, M. Legenkiy
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引用次数: 1

摘要

相关性:降低目标的雷达能见度是军事装备制造中的一项重要任务。真实物体往往位于某下垫面,这就导致这样的系统所产生的散射场比不考虑下垫面再反射的情况下只考虑物体产生的散射场要大得多。在降低雷达特征的任务中,研究降低反射场的方法具有重要的意义。本文的目的是考虑现有的复杂形状物体在下垫面背景下的电磁波散射建模方法,分析反射场分量的水平。提出降低目标雷达能见度的方法。对某对象进行仿真,以评估所提方法的有效性。材料和方法:解决了位于下垫面的复杂形状物体的衍射问题。在这种情况下,要考虑散射场的不同分量:来自物体表面不同元素的单次反射(物理光学分量);物体不同部分之间的一次性再反射;物体与下表面之间的再反射。在数值模拟中,物体上的散射场位于下垫面,下垫面被认为是一个有限尺寸的矩形。结果:考虑了优化复杂形状目标模型以降低其雷达能见度的可能性。特别是考虑了物体表面的几何修饰和使用吸波材料。为了证明这些技术的效果,利用作者先前提出的一种技术来确定复杂形状物体在下垫面背景下的散射场,进行了模拟。结论:提出了一种优化复杂形状目标模型以降低其雷达能见度的方法。对于大多数真实物体,从物体光滑部分反射的场和物体部分之间以及物体与下表面之间的再反射场对总反射场的贡献最大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
About reducing the visibility of complex object on the background of underlying surface
Relevance: Reducing the radar visibility of an object is an important task in the creation of military equipment. Real objects are often located on some underlying surface, which leads to a significant increasing in the scattered field by such a system in comparison with the scattered field by only object without taking into account re-reflection from the underlying surface. The development of methods for reducing the reflected field plays an important role among the tasks of reducing radar signature. The purpose of the work is to consider the existing methods for modeling the scattering of electromagnetic waves on complex shape objects against the background of the underlying surface, analyze the level of the reflected field components. To propose methods for reducing the radar visibility of an object. To carry out a simulation for some object in order to assess the effectiveness of the proposed methods. Materials and methods: The problem of diffraction on the complex shape object, which located on the underlying surface, is solved. In this case, different components of the scattered field are taken into account: single reflection from different elements of the object's surface (physical-optical component); one-time re-reflections between different parts of the object; re-reflection between the object and the underlying surface. In numerical modeling, the scattered field on an object located on the underlying surface, the underlying surface is considered as a rectangle of finite size. Results: The possibilities of optimizing a model of the complex shape object in order to reduce its radar visibility are considered. In particular, geometric modifications of the object's surface and the using radio-absorbing materials are considered. In order to demonstrate the effect of these techniques, using a technique previously proposed by the authors for determining the scattered field by an object of complex shape located against the background of the underlying surface simulations have been carried out. Conclusion: Methods of optimizing a model of the complex shape object to reduce its radar visibility are proposed. For most real objects, the largest contribution to the total reflected field is made by the field reflected from the smooth part of the object and the re-reflection field between parts of the object and between the object and the underlying surface.
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