Kurtosis Impulsive fault Distributed 6 fault 5 4 3 2 k=je-时wa 1 Time
Vibration monitoring as a diagnostic tool Vibration Gears Trending Electrical 7 motor ☒ ⊙ Spectrum Trend on rms Trending on spettrum componenl Frequency (Hz)
Vibration monitoring as a diagnostic tool
Vibration monitoring as a diagnostic tool Sound pressure time Tiesl
Vibration monitoring as a diagnostic tool Sound pressure time
Focused on frequency of interest Band-pass filter Response(dB) B10og 0 -3 -10 Ideal -20- Practical -30 一Filter skirt -40 fif.=ff.f. Frequency(Hz)
Focused on frequency of interest Band-pass filter
Cepstrum Quefrency 1O0 Rahmonics 4444W (a) Spectrum of bad gearbox 80 Gamnitude Frequency (Hz) Lifter (b) Spectrum of good gearbox 70 200 300 400 Frequency (Hz) 95.9 ms (10.4Hz) 28.1ms (35.61Iz (e) Cepstrum of bad gearbox fw (d) Cepstrum of god以earbox 03 F1GURE10.39L10.24]