Cepstrum Analysis

Some machines, such as gear boxes, produce very complicated spectrum signatures. The cepstrum analysis offers a way to simplify the analysis, of these signals.

When trying to diagnose a vibration signal in order to identify possible faults in the machine, the following are investigated:

  • Harmonic relations,
  • Presence of sidebands,
  • The relation of energy in different side band and harmonic families.

The cepstrum analysis

  • Simplifies the analysis of a complicated spectrum, and
  • Is independent of the signal path.