Instantaneous Amplitude-Frequency Feature Extraction for Rotor Fault Based on BEMD and Hilbert Transform

Figure 14

(a) The instantaneous amplitude of the real part and imaginary part of cpf₁; (b) the instantaneous frequency of the real part and imaginary part of cpf₁; (c) the instantaneous amplitude of the real part and imaginary part of cpf₂; (d) the instantaneous frequency of the real part and imaginary part of cpf₂.

(a)

(b)

(c)

(d)