Application Study of Time-frequency Analysis Methods to Offshore Wind Turbines

摘要

Currently, a variety of time-frequency analysis methods have been developed for different applications. However, it is not yet known whether these methods are applicable for offshore wind turbines. Therefore, in this paper, four time-frequency analysis methods—short-time Fourier transform, wavelet transform, Hilbert-Huang transform, and short-time Prony transform (STPT)—are compared by using a nonstationary numerical signal and a set of field test data from an offshore wind turbine. Results from the STPT seem to have better properties for resolving the frequency content of such data.