Hilbert-Huang变换与宽频带爆破信号的时频分析

Hilbert-Huang Transform and Time-Frequency Analysis of Broadband Explosion Vibration Signal

利用小波变换、S变换、Wigner-ville分布(WVD)和Hilbert-Huang变换(HHT)对模拟信号进行时频分析并比较,结果表明基于经验模态分解的HHT具有更强的适应性,能较为准确地提取信号的时变特征。利用HHT对实际记录的宽频带爆破振动信号进行了时频分析,其结果较为准确地描述了信号的时变特征。

We compare the time-frequency spectrums of analog signal which was determined by continuous wavelet transform （CWT）, S-transform, Wigner-Ville distribution （WVD） and Hilbert-Huang transform （HHT） . The results show that HHT based on empirical mode decomposition （EMD） has higher adaptability and can ac- curately extract the time-frequency characteristics of the explosion signal. Then we analyze time-frequency spec- trum of broadband explosion vibration signal in actual by HHT, and time-frequency analysis results accurately described the time varying characteristics of the explosion vibration signal.