航空磁探中潜艇目标的联合估计检测方法研究

doi:10.3969/j.issn.1000-1093.2018.05.001

摘要/Abstract

摘要： 为了解决航空磁探测中水下潜艇目标信号被强磁背景噪声和干扰淹没的问题，提出一种联合估计检测方法。针对潜艇目标基于磁偶极子建立目标磁场光泵测量信号模型，确定了目标信号模型主要由位置三分量x、y、z，目标磁矩三分量M_x、M_y、M_z以及航向角θ等7个未知参量决定。使用光泵磁探仪的观测样本，根据潜艇目标先验信息，基于遗传算法使用Fréchet距离构造适应度函数，搜索得到目标未知参量。根据生成的目标估计信号，构造了平均相关检验统计量，并设计了使用目标估计信号的联合估计检测器。研究结果表明：联合估计检测器在低信噪比条件下仍具有良好的检测能力；相对于传统的正交分解检测和动目标航空磁异常检测，使用目标估计信号的联合估计检测器能够降低虚警概率，提高信噪比，使检测性能更优。

关键词: 潜艇, 联合估计检测, 航空磁异常探测, 磁偶极子, 遗传算法, Fréchet距离, 平均相关检测器

Abstract: To solve the problem that underwater submarine target signals are corrupted by the strong magnetic background noise and interrupter in the aeromagnetic anomaly detection, a joint estimation detection method is proposed. A signal model of target measured by optical pump magnetometer is established for submarine target based on magnetic dipole. The target signal model is determined by 7 unknown parameters: position vector x，y，z, magnetic moment vector M_x,M_y,M_z, and course angle θ. According to the observation sample, the unknown parameters are searched by genetic algorithm and the prior information of submarine target, and the fitness function is constructed by Fréchet distance. Then the test statistic of mean correlation is proposed based on the target estimated signal, and the correlation detector using target estimated signal is designed. The performance analysis using measurement data shows that the detector is still with good detection performance in the low signal-to-noise ratio condition. Compared with the traditional detection based on decomposition of orthonormal basis and the aeromagnetic anomaly detection for moving target, the performance of the joint estimator and detector using target estimated signal is better, and it can improve the signal-to-noise ratio and reduce the false alarm probability. Key

Key words: submarine, jointestimationanddetection, airbornemagneticanomalydetection, magneticdipole, geneticalgorithm, Fréchetdistance, meancorrelationdetector

中图分类号:

周家新，陈建勇，单志超，陈长康. 航空磁探中潜艇目标的联合估计检测方法研究[J]. 兵工学报, 2018, 39(5): 833-840.

ZHOU Jia-xin， CHEN Jian-yong， SHAN Zhi-chao， CHEN Chang-kang. Research on Joint Estimation and Detection of Submarine Target in Airborne Magnetic Anomaly Detection[J]. Acta Armamentarii, 2018, 39(5): 833-840.

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第39卷
第5期2018 年5月兵工学报ACTA
ARMAMENTARIIVol.39No.5May2018

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