The Application on Gear Fault Detection by Using Fast Time-Frequency Order Spectrum

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Abstract:

The increased instantaneous speed in signal patterns which generated by the mechanical equipment are largely non-stationary. The signal features are averaged in correspondence with the length of analysis time, thus making it impossible to highlight the signal characteristics and caused the difficulties in identifying or diagnosing faults. In this paper, the wavelet order spectrum method using a combination of wavelet transform (WT) and speed frequency ordering. The feature order does not change with variations in speed, thus can effectively identify non-stationary faults in mechanical equipment. In addition, Principal Components Analysis (PCA) is used to extract the main features of the wavelet order spectrum and reduce the volume of data. This is combined with self-organizing maps (SOM) to devise an artificial intelligence method for fault diagnosis in non-stationary states. Lastly, the wavelet order spectrum method is verified by using a gear-rotor test platform that proofs the feasibility for the theory.

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538-542

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January 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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