基于HHT的水中爆炸冲击波信号特征分析

Analyses of underwater explosive shock wave signal based on HHT

水中爆炸冲击波信号是一种瞬态、非平稳信信号,其信号的处理精度直接影响了冲击波测量精度和爆炸点的定位等。希尔伯特——黄变换(HHT)是一种基于瞬时频率分解的时频信号分析方法。本文介绍了一种利用HHT对水中爆炸冲击波信号的处理方法,研究结果表明,HHT方法对于处理瞬态非平稳信号是非常有效的。

Underwater explosive shock wave signals are transient and non-stationary. The processing accuracy influences the measurements of shock wave signals and the localization of explosive source directly. Hilbert Huang Transform is a time-frequency method based on EMD. A method based on HHT which is effective in processing the underwater explosive shock wave signal is introduced in this paper. The analyses show that the HHT is effective in processing the transient and non-stationary signals.