Abstract:Many signals of wind turbine faults are non-stationary and have highly complex
time-frequency characteristics. Traditional time-frequency analysis method, such as Windowed
Fourier Transform method, has no noticeable effect in handing non-stationary signals. Hilbert-Huang
Transform (HHT) is a new signal processing method for analyzing the non-stationary mechanical
signals. Based on Empirical Mode Decomposition (EMD), the Intrinsic Mode Function (IMF) in
HHT can reflect the intrinsic physical characteristics of …
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