Shock and Vibration / 2018 / Article / Fig 8

Research Article

Joint Amplitude and Frequency Demodulation Analysis Based on Variational Mode Decomposition for Multifault Diagnosis of a Multistage Reducer

Figure 8

Analysis results for sun gear with broken teeth and worn spur gear: (a) time-domain waveform of filtered vibration signal, (b) spectrum of filtered vibration signal, (c) envelope spectrum of filtered vibration signal, (d) time-domain and time-frequency VMD decomposition images, (e) envelope of VIMF1, and (f) envelope of VIMF3.
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