贾高伟,阴鹏,邵帅,等. 飞行器典型结构雷达成像诊断与分析[J]. 电波科学学报,2024,39(3):1-13. DOI: 10.12265/j.cjors.2023173
      引用本文: 贾高伟,阴鹏,邵帅,等. 飞行器典型结构雷达成像诊断与分析[J]. 电波科学学报,2024,39(3):1-13. DOI: 10.12265/j.cjors.2023173
      JIA G W, YIN P, SHAO S, et al. Radar imaging diagnosis and analysis of typical structure on aircraft[J]. Chinese journal of radio science,2024,39(3):1-13. (in Chinese). DOI: 10.12265/j.cjors.2023173
      Citation: JIA G W, YIN P, SHAO S, et al. Radar imaging diagnosis and analysis of typical structure on aircraft[J]. Chinese journal of radio science,2024,39(3):1-13. (in Chinese). DOI: 10.12265/j.cjors.2023173

      飞行器典型结构雷达成像诊断与分析

      Radar imaging diagnosis and analysis of typical structure on aircraft

      • 摘要: 隐身飞行器逐步受到各国青睐,评估目标隐身能力并明确隐身性能改善的方向在飞行器隐身设计工作中至为关键。在雷达高频区,飞行器目标的散射特性呈现“稀疏性”,散射场遵循局部性原理,目标的散射分布能够等效为由一系列离散分布的孤立散射中心组成。鉴于逆合成孔径雷达(inverse synthetic aperture radar, ISAR)图像具有分辨率高、能够准确精细反映散射点空间位置等优势,本文以仿真成像的形式展现了典型结构对应的ISAR图像,分析了散射点形态与散射机理之间的关联关系,提炼得到了球体、圆柱体、三棱柱、圆锥、直筒式腔体、S弯腔体等6类典型飞行器结构对应的主要散射路径,并针对两种不同类型的隐身无人机,开展了基于雷达成像的强散射点诊断与评估,得出了两类无人机的主要散射源集中在进气道的结论。

         

        Abstract: Stealth aircraft are gradually favored by various countries. Evaluating the stealth ability of the targets and identifying the direction for improving stealth performance is crucial in the aircraft stealth design work. As for the high-frequency radar, the scattering characteristics of aircraft targets exhibit “sparsity”, and the scattering field follows the principle of locality. The scattering distribution of the target presents as a series of discrete isolated scattering centers. Given the advantages of high resolution and the ability to accurately reflect the spatial position of scattering points in inverse synthetic aperture radar (ISAR) images, this article analyzes the morphology of scattering points in ISAR images corresponding to different scattering mechanisms by using simulation methods. It establishes the correlation between typical geometry and imaging scattering points. The main scattering paths corresponding to six typical aircraft structures, including spheres, cylinders, prisms, cones, cylindrical cavities, and S-shaped cavities, are extracted. Strong scattering point diagnosis and evaluation based on radar imaging are carried out for two different types of stealth drones, and the conclusion is drawn that the main scattering sources of the two types of drones are concentrated in the intake duct.

         

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