未知姿态目标航磁异常探测的最优飞行方向分析

doi:10.12305/j.issn.1001-506X.2024.01.05

系统工程与电子技术 ›› 2023, Vol. 46 ›› Issue (1): 42-50.doi: 10.12305/j.issn.1001-506X.2024.01.05

• 电子技术 • 上一篇

未知姿态目标航磁异常探测的最优飞行方向分析

石昱¹, 卞雷祥¹^,*, 庄志洪², 付梦印³, 王春娥⁴, 秦杰⁴

1. 南京理工大学机械工程学院, 江苏南京 210094
2. 南京理工大学电子工程与光电技术学院, 江苏南京 210094
3. 南京理工大学自动化学院, 江苏南京 210094
4. 北京自动化控制设备研究所, 北京 100074

收稿日期:2022-08-31 出版日期:2023-12-28 发布日期:2024-01-11
通讯作者: 卞雷祥
作者简介:石昱(1998—)，男，博士研究生, 主要研究方向为磁异常探测、数字信号处理
卞雷祥(1985—)，男，教授，博士, 主要研究方向为敏感材料磁传感器、地下目标电磁探测与成像技术、磁异常探测
庄志洪(1969—)，男，研究员，博士, 主要研究方向为数字信号处理、自适应滤波、导航与飞行控制、磁异常探测
付梦印(1964—)，男，工程院院士，博士, 主要研究方向为运动平台组合导航与智能导航
王春娥(1984—)，女，高级工程师, 博士，主要研究方向为量子磁探测
秦杰(1984—)，男，研究员，博士，主要研究方向为量子传感及系统
基金资助:
国家自然科学基金(61973165);国家自然科学基金(U2141237)

Optimal flight direction analysis for aeromagnetic anomaly detection of unknown attitude targets

Yu SHI¹, Leixiang BIAN¹^,*, Zhihong ZHUANG², Mengyin FU³, Chune WANG⁴, Jie QIN⁴

1. School of Mechanical and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2. School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
3. School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China
4. Beijing Institute of Automatic Control Equipment, Beijing 100074, China

Received:2022-08-31 Online:2023-12-28 Published:2024-01-11
Contact: Leixiang BIAN

摘要/Abstract

摘要：

小型航空磁异常探测平台的飞行路径优化是提高磁异常信号强度的关键途径之一。然而, 铁磁性目标在地磁场中磁化产生的磁矩大小和方向随其姿态变化, 导致目标磁场的空间分布与不可知的目标姿态相关。针对以上问题，建立了典型目标磁矩精确计算模型, 计算结果表明: 目标在不同姿态(方位0°~360°和俯仰-90°~90°)下被地磁磁化产生的磁矩模值变化范围为3.55×10⁵~2.42×10⁶ A·m²。当目标长轴与地磁场方向一致时取最大值, 当目标长轴与地磁场方向垂直时取最小值, 计算结果与多物理场软件仿真结果的差异仅有0.003%~0.04%。模拟航磁探测过程的建模分析表明: 当目标处于任意姿态时, 目标磁矩在飞行平面内磁异常信号变化最大的路径与地磁场投影的夹角γ_xy变化范围为0°~50.045 7°; 在目标姿态和磁矩信息未知的情况下, 沿地磁场在飞行平面内的投影方向飞行是最优的选择, 此时, 能获取的磁异常变化量约为飞行平面内最大变化量的78%~100%。

关键词: 磁异常探测, 最优飞行路径, 磁矩计算模型, 信号强度

Abstract:

In aeromagnetic anomaly detection, flight path optimization for aerial platform is one of the key approaches to improve magnetic anomaly signal intensity. However, the magnetic moment of a ferromagnetic target magnetized by geomagnetic field varies with its attitude, resulting that the spatial distribution of the target magnetic field is related to the unpredictable target attitude. In this paper, an accurate computation model of the magnetic moment of a typical target is established. The calculation results show that the modulus of magnetic moment generated by the geomagnetization of the target at different attitudes (orientation: 0°~360° and pitch: -90°~90°) varies from 3.55×10⁵ to 2.42×10⁶ A·m². The magnetic moment value reaches a maximum and minimum when the long axis of the target is in line with the direction of the geomagnetic field and perpendicular to the direction of the geomagnetic field, respectively. The difference between the calculation results and the simulation results is only 0.003%~0.04%. According to the analysis of aeromagnetic detection modeling, the angle between the path of the maximum magnetic anomaly signal in the flight plane and the projection of geomagnetic field varies from 0° to 50.045 7°. When the attitude and magnetic moment of the target are unpredictable, the path in line with the projection of geomagnetic field is a better choice. The variation of magnetic anomaly signal on this path is 78%~100% of the maximum variation in the flight plane.

Key words: magnetic anomaly detection, optimal flight path, computation model of the magnetic moment, signal strength

中图分类号:

O411.3

石昱, 卞雷祥, 庄志洪, 付梦印, 王春娥, 秦杰. 未知姿态目标航磁异常探测的最优飞行方向分析[J]. 系统工程与电子技术, 2023, 46(1): 42-50.

Yu SHI, Leixiang BIAN, Zhihong ZHUANG, Mengyin FU, Chune WANG, Jie QIN. Optimal flight direction analysis for aeromagnetic anomaly detection of unknown attitude targets[J]. Systems Engineering and Electronics, 2023, 46(1): 42-50.

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未知姿态目标航磁异常探测的最优飞行方向分析

Optimal flight direction analysis for aeromagnetic anomaly detection of unknown attitude targets

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