Cyclic Autocorrelation Function for Gear Box Fault Diagnosis

In consideration of the structures and specific running of the gear box, vibration signal sampled usually is possessed of cyclo-stationary. Based on the second order cyclostationary, by the simulation signal the paper is pointed that cyclic autocorrelation function has better demodulation performance and de-noise performance when multiplying noise is stationary random process. The conclusion is validated by the vibration signal measured on the gearbox.