Abstract

The article explored a new signal processing method called order cepstrum analysis, it can analyze the instantaneous signals of the rotary mechanism, and can process the non-stationary vibration signals such as speed up or speed down signals effectively. Firstly, the start-up vibration signals of the gearbox are sampled at constant time increments in time-domain, then the data are resampled with software at constant angle increments in angle-domain. Therefore, the time domain instantaneously signal is changed into angle domain stationary signal. Then, the stationary signal is analyzed by order cepstrum. From the result we can find that it can avoid the frequency fuzzy phenomenon effectively, which cannot be solved with the traditional frequency spectrum analysis.

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