Acoustics Source Identification of Diesel Engines Based on Variational Mode Decomposition, Fast Independent Component Analysis, and Hilbert Transformation

<div>Identification of time-frequency spectrum and theoretical frequency by the numerical model in VMD and EMD methods. (a) VMD identification of time-frequency spectrum. (b) EMD identification of time-frequency spectrum.</div>

Shock and Vibration

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Figure 9: Acoustics Source Identification of Diesel Engines Based on Variational Mode Decomposition, Fast Independent Component Analysis, and Hilbert Transformation 

Figure 9 | Acoustics Source Identification of Diesel Engines Based on Variational Mode Decomposition, Fast Independent Component Analysis, and Hilbert Transformation 