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Description: Statistical theory based on the cycle of cyclostationary signal processing, mainly studied the statistical properties of the signal of second cycle, ie cyclic autocorrelation function and cyclic spectral density, noting that cyclic autocorrelation function is not zero cycle frequency corresponds to a certain signal These faults, and can be demodulated AM signal through cyclic frequency scanning method to extract the modulation source distributed in the frequency domain of the low frequency cycle, the results can be cyclic frequency- Frequency- loop spectral density of the three-dimensional graph. using simulated signals right This method is validated and used rolling bearing, the outer ring and rolling fault diagnosis can be effectively isolated from the corresponding fault characteristic frequency.
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二阶循环统计量在机械故障诊断中的应用.pdf
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