A new time-domain non-peak value method for identifying the frequency and damping

Multi-scale chirp sparse representation for autonomous system non-stationary signal with Fast Varying Instantaneous Frequency

“…In general, the common time-frequency analysis methods mainly include short-time Fourier transform [7], Hilbert Huang transform [8], continuous wavelet transform [9] and so on. Furthermore, the peak value search method [10] is used to search peak value of time-frequency joint function and retain the maximum value of time-frequency joint function to identify instantaneous frequency. However, the estimated instantaneous frequency by using peak search method also be affected by interference component of signal, which reduces the estimation accuracy.…”