摘要
研究水下爆炸冲击波信号的时频特性,对于舰艇利用弹药水下爆炸信号对抗自导鱼雷具有重要的实际意义。本文针对EMD-Hilbert方法中经验模态分解(EMD)存在模态混叠的问题,提出CEEMDAN-Hilbert方法实现水下爆炸冲击波信号精确的时频分析。在水深100 m处单发炸药爆炸,产生爆炸信号的频率主要分布在56.5 kHz以下的低频段,特别是0~28.3 kHz以下的能量最大,高于56.5 kHz的能量较少。通过与EMD-Hilbert方法相比,CEEMDAN-Hilbert方法在28.3~56.5 kHz频段的能量分布会更加明显,具有一定的优越性。
The study on the time-frequency character istics of underwater explosion shockwave sig-nals is of great practical significance for ships t o utilize the underwater explosion signals of muni-tions against self-guided torpedoes.The CEEMDAN-H ilbert method is proposed to realize the accu-rate time-frequency analysis of underwater explosi on shockwave signals in response to modal alias-ing in the empirical modal decomposition(EMD)of the EMD-Hilbert method.In a single explosion at the depth of 100 m in the water,the frequency of t he generated explosion signal is mainly distrib-uted in the low frequency band below 56.5 kHz,espe cially the energy below 0~28.3 kHz is the largest,and the energy higher than 56.5 kHz is les s common.By comparing with the EMD-Hilbert method,the energy distribution of CEEMDAN-Hilbert method in the frequency band of 28.3~56.5 kHz will be more obvious,which has certain su periority.
作者
樊涛
王宪楠
吴岩
赵爽
郭策安
张健
FAN Tao;WANG Xiannan;WU Yan;ZHAO Shuang;GUO Cean;ZHANG Jian(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2024年第5期20-26,共7页
Journal of Shenyang Ligong University
基金
辽宁省教育厅高等学校基本科研项目(LJKZ0272)。
作者简介
樊涛(1996-),男,硕士研究生;通信作者:王宪楠(1987-),女,副教授,博士,研究方向为目标探测识别、信号处理技术。
