Analysis and processing shock acceleration signal based on EMD

The projectile's penetration acceleration signal from the test is a kind of shock acceleration signal, and also is a kind of typical Nonstationary Random Signal(NRS), the duration of the signal is very short and its frequency components are rapidly changed with time. Empirical Mode Decomposition(EMD) is a novel method especially fit for dealing with the NRS, it can decompose the signal into the limited fuherent Modality Function(IMF) rather than the sine or cosine as the Fourier transformation does, each IMF component highlights the signal partial characteristic, and it can gain effective and accurate characteristic information of the signal with the further analysis to the IMF. The final analysis results show that EMD is a useful and effective analysis tool for penetration acceleration signal, and it is significant for engineering design and practice.