摘要
为了实现对舰船磁场信号的准确重构及换算,在缩比模型试验数据分析的基础上,对磁性处理后的船模磁场时频特性进行分析,建立起截止频率与最大能谱的关系,得到采样间隔与船长间的数学模型,提出适用于磁场的最大采样间隔计算方法,结合磁体模拟法进行磁场深度换算完成对该文方法的验证。结果表明,该方法对目标形状鲁棒性好,水面舰艇和水下潜艇目标皆适用,在较大采样间隔条件下能完成较高精度的信号重构,当由浅向深进行换算时,换算误差皆小于7%,当换算的基准深度不小于3倍船宽时,能完成由浅向深和由深向浅双向的磁场换算,换算误差均小于10%。
In order to realize the accurate reconstruction and conversion of the ship magnetic field signal, based on the analysis of the scaled model test data, this paper first analyzes the time-frequency characteristics of the ship model magnetic field after magnetic treatment, establishes the relationship between the cutoff frequency and the maximum energy spectrum, and obtains the mathematical model between the sampling interval and the ship length, and then puts forward the calculation method of the maximum sampling interval suitable for the magnetic field. Finally, the magnetic field depth conversion is carried out by combining the magnet simulation method to verify the method in this paper. The results show that the method has good robustness to target shape, and it is suitable for both surface ships and underwater submarine targets. Under the condition of large sampling interval, high precision signal reconstruction can be completed. When the conversion is carried out from shallow to deep, the conversion error is less than 7%. When the conversion reference depth is not less than 3 times the ship width, the magnetic field conversion from shallow to deep and from deep to shallow can be completed,and the conversion error is less than 10%.
作者
刘琪
孙兆龙
姜润翔
武晓康
雷怡琴
Liu Qi;Sun Zhaolong;Jiang Runxiang;Wu Xiaokang;Lei Yiqin(College of Electrical Engineering Naval University of Engineering ,Wuhan 430033 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第15期3723-3732,共10页
Transactions of China Electrotechnical Society
关键词
舰船磁场
能量谱
最大采样间隔
信号重构
深度换算
Ships magnetic field
energy spectrum
maximum sampling interval
signal reconstruction
depth conversion
