雷达目标散射中心正向自动化建模方法研究与实现

doi:10.12305/j.issn.1001-506X.2021.10.02

摘要/Abstract

摘要：

为进一步优化散射中心参数化模型建模方法, 本文从目标的几何模型出发, 对复杂目标结构按几何面进行分区编号后, 进行散射中心模型的正向自动化建模。自动化方法主要实现了模型长度、位置等参数的自动推算。该方法实现了对目标散射来源、散射机理和散射中心模型参数的全自动判定, 提高了建模效率。首先对几何模型部件分解, 然后采用射线追踪与分集技术, 将目标散射场依照精度要求简化为部分射线贡献叠加, 并研究了散射中心模型参数的自动推算。最后本文计算了一系列散射中心参数化模型, 并与可靠数据对比, 验证了本文自动化建模方法的有效性。

关键词: 电磁散射机理, 正向自动建模, 散射中心, 射线追踪, 目标识别

Abstract:

In order to further optimize the modeling method of scattering center parametric model, the forward automatic modeling method of scattering center model is carried out based on the geometric model of the target, after the complex structure of the target is partitioned and numbered according to the geometric surface. The automatic method mainly realizes the automatic calculation of model length, position and other parameters. This method can automatically determine the scattering source, scattering mechanism and scattering center model parameters, and improve the modeling efficiency. Firstly, the components of the geometric model are decomposed. Then, the scattering field of the target is simplified as the superposition of partial ray contributions according to the accuracy requirements by using ray tracing and diversity technology, and the automatic calculation of the scattering center model parameters is studied. Finally, a series of scattering center parametric models are calculated and compared with reliable data to verify the effectiveness of the automatic modeling method.

Key words: electromagnetic scattering mechanism, forward automatic modeling, scattering center, ray tracing, target recognition

中图分类号:

O441

何思远, 朱凌昆, 刘进, 边志丹, 张云华, 朱国强. 雷达目标散射中心正向自动化建模方法研究与实现[J]. 系统工程与电子技术, 2021, 43(10): 2706-2717.

Siyuan HE, Lingkun ZHU, Jin LIU, Zhidan BIAN, Yunhua ZHANG, Guoqiang ZHU. Research and implementation of forward automatic modeling methodfor radar target scattering center[J]. Systems Engineering and Electronics, 2021, 43(10): 2706-2717.

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参考文献 30

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几何结构	几何尺寸	主曲率半径1	主曲率半径2	判定曲面类型
	长: 6 宽: 8	∞	∞	平板
	底面半径: 4 高: 8	有限值(4)	∞	单弯曲曲面
	半径: 3	有限值(2.98)	有限值(3.05)	双弯曲曲面

参数	数值	参数	数值
极化	HH	中心方位角	ϕ_c
中心频率/GHz	9	角宽/(°)	5
带宽/GHz	1	角度步进/(°)	0.05
频率步进/MHz	10	角点数	101
频点数	101	方位向分辨率/m	0.15
距离向分辨率/m	0.15	不模糊距离/m	15
不模糊距离/m	15

序号	散射来源	A	散射机理	α	L/m	位置/m
1	左轮盖与防御板	0.413 7	二面角	1	5.2	(-0.55, 1.50, 1.27)
2	车身与左防御板a	0.019 0	二面角	1	0.69	(1.45, -1, 1.37)
3	车身与左防御板b	0.034 7	二面角	1	0.81	(-1.2, -1, 1.37)
4	车身与左防御板c	0.034 7	二面角	1	1.13	(-2.7, -1, 1.37)
5	车身与小方柱	0.085 2	二面角	1	0.5	(-2.05, 0.25, 1.37)
6	左防御板与小方柱	0.069 9	二面角	1	0.5	(-2.05, 0.25, 1.47)
7	炮筒	0.056 5	圆柱面	0.5	5	(3.52, 0.08, 1.83)
8	炮塔与左防御板	0.019 1	平板与圆柱	0.5	0	(0, 1, 1.47)

参数	数值	参数	数值
极化	HH	俯仰角	θ
频率/GHz	9.3~9.9	方位角度	φ
频率间隔/MHz	5.9	角度间隔/(°)	0.035
带宽/GHz	0.6	方位角宽/(°)	3.5
距离向分辨率/m	0.25	方位向分辨率/m	0.25

散射中心	部件号	散射机理	RCSdBsm	频率依赖参数α	位置参数(x, y, z)
1	49-13	二面角	-2.620 792 87	1	(-3.625 59 0.153 1 0.647 878)
2	16	圆柱面	-3.225 884 88	0.5	(-2.460 85 -0.996 47 -0.138 545)
3	23	圆柱面	-3.338 150 72	0.5	(2.595 48 -0.817 402 1.234 72)
4	11	二面角	-9.168 391 29	1	(3.042 61 -1.242 -0.379 252)
5	21-13	二面角	-6.538 622 05	1	(3.079 77 -0.257 114 1.165 2)