دانلود مقاله Assessing Different Methods of Deriving Instantaneous Frequency Including STFT, Wavelet , EMD-HT, and GPOF
سال انتشار: ۱۳۸۵
محل انتشار: هفتمین کنگره بین المللی مهندسی عمران
تعداد صفحات: ۸
A.Shafieezadeh – Granduate Student
M.Motavalli – Assistant professor
This paper describes four methods for extracting the instantaneous frequency of a given signal. These four algorithms ate short time Fourier transform, wavelet transform, empirical mode decomposition and Hilbert transform, and generalized pencil of function methods. A SDOF structure is modeled and subjected to a varying, superimposed amplitude and frequency- modulated excitation. The structural response is analyzed by these methods and its instantaneous frequency is estimated and shown in the paper.