基于时域特征分布的核爆电磁脉冲识别算法

王涛1,陈福贵2,刘明2,石小磊2,陈伟辉2,朱万华1,黄玲1,方广有1

振动与冲击 ›› 2020, Vol. 39 ›› Issue (8) : 159-164.

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (8) : 159-164.
论文

基于时域特征分布的核爆电磁脉冲识别算法

  • 王涛1,陈福贵2,刘明2,石小磊2,陈伟辉2,朱万华1,黄玲1,方广有1
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A discrimination algorithm of nuclear electromagnetic pulse based on characteristic parameters in time domain

  • WANG Tao1,CHEN Fugui2,LIU Ming2,SHI Xiaolei2,CHEN Weihui2,ZHU Wanhua1,HUANG Ling1,FANG Guangyou1
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摘要

为解决近区核爆电磁脉冲(NEMP)与闪电电磁脉冲(LEMP)的识别问题,提出一种500 km内的时域自动识别算法,并详细介绍了关键环节的具体实现过程。对于多站接收到的同源电磁脉冲(EMP)信号,通过场强阈值触发和波形相关运算结合,确定各条波形时域分析的起始点;根据1 000 km处各站直达波和反射波的时差估算电离层高度,以此高度计算时域分析的截止点。定义4个特征参数来表征该段时间范围内的波形特征,并通过对大量的LEMP样本进行统计,得到各个特征参数的分布特性,结合实测NEMP波形的特征参数,制定一套NEMP自动识别算法。实测数据验证结果显示,该算法可有效排除99%以上的LEMP干扰,并有效识别近区范围内的NEMP波形。

Abstract

Abstract:In order to discriminate nuclear electromagnetic pulse (NEMP) and lightning electromagnetic pulse (LEMP), an automatic time-domain algorithm at a range of 500 km was proposed.First, for time series of multiple stations emitted by identical source, a method combined of threshold triggering and correlation operation was developed to choose start time of each series.In addition, end time was located according to the height of reflecting layer in the ionosphere, which was estimated through the time difference of direct wave and reflected wave at about 1 000 km distance.Then four parameters were defined to character waveforms.By fitting statistics result with proper probability density function, the four parameters’ distribution of LEMP was drawn.Contrasting the distribution with parameters calculated from NEMP data, finally, a discrimination algorithm was obtained.A test was performed to verify the algorithm, which can identify NEMP data and more than 99% of LEMP data at a range of 500 km.

关键词

时域波形 / 特征分布 / 核爆电磁脉冲(NEMP) / 闪电电磁脉冲(LEMP) / 近区识别

Key words

time domain waveform / feature distribution / nuclear electromagnetic (NEMP) / lightning electromagnetic pulse (LEMP) / near field discrimination

引用本文

导出引用
王涛1,陈福贵2,刘明2,石小磊2,陈伟辉2,朱万华1,黄玲1,方广有1. 基于时域特征分布的核爆电磁脉冲识别算法[J]. 振动与冲击, 2020, 39(8): 159-164
WANG Tao1,CHEN Fugui2,LIU Ming2,SHI Xiaolei2,CHEN Weihui2,ZHU Wanhua1,HUANG Ling1,FANG Guangyou1. A discrimination algorithm of nuclear electromagnetic pulse based on characteristic parameters in time domain[J]. Journal of Vibration and Shock, 2020, 39(8): 159-164

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