Cepstrum Analysis for Localized Fault Detection and Diagnosis
Cepstrum analysis, a technique for localized fault detection, involves power spectrum, logarithm, and inverse Fourier transform. It reveals sidebands, spacing, strength, and harmonics, aiding in deciphering complex spectra.
For vibration analysts
CEPSTRUM ANALYSIS is one of the effective technique (other is envelope analysis) for localized fault (gear, bearing, etc.) detection/diagnosis.
How is it calculated ?
By following operations - power spectrum --> Logarithm --> Inverse Fourier transform.
What does it indicate ?
Number of sidebands, their spacing, their strength, and harmonics.
Why not just analyze spectrum ?
It becomes difficult (and time consuming) when spectra contain multiple/clustered sidebands originating from various sources. It helps in deciphering spectral information.
Do you use this technique ?
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