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The degree of cyclostationarity technique is introduced and applied effectively to gearbox faults diagnosis under run-up condition. This new method combines order tracking technique with second order cyclo-stationary statistics analysis. The resampling signal can be obtained by resampling of the vibration signal that has been sampled in the time domain. Therefore, the time domain transient signal...
Varying speed machinery condition detection and fault diagnosis are more difficult due to non-stationary machine dynamics and vibration. A new approach to fault diagnosis of bearing under running up based on order tracking and Hilbert-Huang transform (HHT) is presented. The non-stationary vibration signals are transformed from the time domain transient signal to angle domain stationary one using order...
The order bi-cepstrum technique is introduced and applied effectively to gearbox faults diagnosis under run-up condition. This new method combines order tracking technique with bi-cepstrum analysis. The resampling signal can be obtained by resampling of the vibration signal that has been sampled in the time domain. Therefore, the time domain transient signal is changed into angle domain stationary...
The speed-up and speed-down of the gearbox are non-stationary process and the vibration signal can not be processed by traditional processing method. In order to process the non-stationary vibration signals such as speed-up or speed-down signals effectively, the order envelope analysis technique is presented. This new method combines order tracking technique with envelope spectrum analysis. Firstly,...
The order bi-cepstrum technique is introduced and applied effectively to gearbox faults diagnosis under run-up condition. This new method combines order tracking technique with bi-cepstrum analysis. The resampling signal can be obtained by resampling of the vibration signal that has been sampled in the time domain. Therefore, the time domain transient signal is changed into angle domain stationary...
A new method to fault diagnosis of bearing based on order tracking technique and autoregressive (AR) spectrum is presented. Firstly, the transient vibration signals during run-up condition of gearbox are re-sampled using order tracking technique. Therefore, the time domain transient signals are transformed into angle domain stationary signals. Then the AR model estimation is applied to angle domain...
This paper deals with the detection of gear crack faults in gearbox under non-stationary run-up of gear drives. In order to process the non-stationary vibration signals such as run-up or run-down vibration signals effectively, the order bi-spectrum technique is presented. This new method combines computed order tracking technique with bi-spectrum analysis. Firstly, the vibration signal is sampled...
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