基于HRRP序列的钝头倒角锥目标微动特性分析及参数估计

苏楠; 戴奉周; 刘宏伟

doi:10.11999/JEIT180520

基于HRRP序列的钝头倒角锥目标微动特性分析及参数估计

doi: 10.11999/JEIT180520

西安电子科技大学雷达信号处理国家重点实验室西安 710071

基金项目: 国家自然科学基金(61671359)，国家杰出青年科学基金(61525105)，中央高校基本科研业务费(JB180210)

详细信息

作者简介:
苏楠：男，1990年生，博士生，研究方向为空间目标识别

戴奉周：男，1978年生，副教授，硕士生导师，研究方向为空间目标探测、毫米波雷达探测与成像、高速信号处理(基于FPGA和多核DSP等平台)

刘宏伟：男，1971年生，教授，博士生导师，研究方向为雷达信号处理、雷达自动目标识别、认知雷达、协同探测等

通讯作者:
戴奉周 fzdai@xidian.edu.cn

中图分类号: TN958.94
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出版历程
- 收稿日期: 2018-05-28
- 修回日期: 2019-04-25
- 网络出版日期: 2019-05-06
- 刊出日期: 2019-07-01

Micro-motion Characteristic Analysis and Parameters Estimation for Blunt-nosed Chamfered Cone Based on HRRP Sequence

National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China

Funds: The National Natural Science Foundation of China (61671359), The National Science Foundation for Distinguished Young Scholars (61525105), The Fundamental Research Funds for the Central Universities of China (JB180210)

摘要

摘要: 合适的弹头结构建模是正确估计弹头参数的基础。该文提出一种描述弹头的钝头倒角锥模型，该模型将球冠散射中心和倒角散射中心看作是滑动散射中心，并引入锥体侧面遮挡效应对散射中心位置的影响，给出散射中心位置变化的一般形式；接着分析了钝头倒角锥模型各个散射中心的微动特性；在此基础上，提出了一种估计目标运动参数和结构参数的非线性优化的方法；最后，仿真结果验证了该文模型的正确性及参数估计方法的有效性。
- 目标识别 /
- 钝头倒角锥模型 /
- 遮挡效应 /
- 微动特性 /
- 参数估计
Abstract: Appropriate warhead structure modeling is the basis for warhead parameters estimation. In this paper, the warhead is modeled by the blunt-nosed chamfered cone model, which regards the spherical center and the chamfer scattering centers as the sliding centers and takes the influence of the side of the cone into account, the general form of the position of the scattering centers is given based on the model. Then, the micro-motion of the scattering centers in the blunt-nosed chamfered cone model is derived. Based on this, a nonlinear optimization method is proposed to estimate the target's motion parameters and structural parameters. Finally, simulation results verify the correctness of the model and the effectiveness of the parameter estimation method.
- Target recognition /
- Blunt-nosed chamfered cone /
- Occlusion effect /
- Micro-motion characteristic analysis /
- Parameters estimation

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图 1 钝头倒角锥模型

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图 2 钝头倒角锥进动模型

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图 3 电磁仿真模型

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图 4 散射中心投影距离

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图 5 不同信噪比下微动参数估计误差

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表 1 不同$\text{β}$角下的散射中心位置矢量

	视角I $0 < \beta < \alpha $	视角II $\alpha < \beta < {\text{π}}/2 - \alpha $	视角III $ {\text{π}}/2 - \alpha < \beta < {\text{π}}/2$	视角IV $ {\text{π}}/2 < \beta < {\text{π}} - \alpha $	视角V $ {\text{π}} - \alpha < \beta < {\text{π}}$
A	${{\text{r}}_{{\rm{AU}}}}\left( t \right)$	${{\text{r}}_{{\rm{AU}}}}\left( t \right)$	${{\text{r}}_{{\rm{AS}}}}\left( t \right)$	${{\text{r}}_{{\rm{AS}}}}\left( t \right)$	–
B	${{\text{r}}_{{\rm{BS1}}}}\left( t \right)$	${{\text{r}}_{{\rm{BS1}}}}\left( t \right)$	${{\text{r}}_{{\rm{BU}}}}\left( t \right)$	${{\text{r}}_{{\rm{BU}}}}\left( t \right)$	${{\text{r}}_{{\rm{BU}}}}\left( t \right)$
C	${{\text{r}}_{{\rm{CS1}}}}\left( t \right)$	–	–	${{\text{r}}_{{\rm{CS2}}}}\left( t \right)$	${{\text{r}}_{{\rm{CS2}}}}\left( t \right)$

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表 2 目标参数估计结果对比

	$H({\rm{m}})$	$R({\rm{m}})$	${R_{\rm A}}({\rm{m}})$	${R_{\rm B}}({\rm{m}})$	$\gamma {(^ \circ })$	$\varphi {(^ \circ })$
真实值	2.0000	0.4000	0.1000	0.1000	40.0000	10.0000
本文模型	2.0384	0.3885	0.0968	0.0952	40.3328	9.9964
文献[4]模型	1.6001	0.5183	0.0000	0.0000	38.3837	8.2801

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