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In this paper, we introduce a new data analysis method, called time-frequency distribution decomposition (TFDD), to extract the components of vibration signal one by one for rotor rub-impact fault. When the early rub-impact fault occurs in the rotor system, the vibration signal will present frequency modulation feature because of the periodic rub-impact between the stator and the rotor. Through approximating...
Conventional time-frequency representation (TFR) methods have played an important role in characterizing the time-frequency (TF) pattern of the nonstationary signal. In this paper, a new TFR algorithm, called matching demodulation transform (MDT), is introduced to extract the feature of highly oscillating frequency modulation for rotor rub-impact fault. When the early rub-impact fault occurs in the...
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