Abstract: Engine test dynamic data usually contains important information such as vibration and pulsating pressure of key parts,which is an important reference index for evaluating engine performance,component characteristics and optimal design.The advantages and disadvantages of several methods suitable for dynamic data processing are summarized,such as fast Fourier transform,wavelet analysis,wavelet packet analysis,Hilbert-Huang transform,and the application of these methods and their combination in dynamic data analysis and processing are introduced.

Key words: Engine test, Dynamic data FFT, Wavelet analysis, Wavelet packet analysis, Hilbert-Huang transform