A Method for Optimizing Frequency Harmonic Averaging of Rotating Machinery
An optimization method and technology of rotating machinery, applied in the testing of mechanical parts, the testing of machine/structural parts, instruments, etc., can solve the problems of co-frequency interference, difficult feature extraction, low feature information energy, etc., to improve signal-to-noise Ratio, the process is simple, the effect is obvious
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Embodiment 1
[0029] Embodiment 1, with reference to figure 1 , a method for optimizing the frequency spectrum harmonic averaging of rotating machinery, comprising the following steps:
[0030] Step 1) Perform Fourier transform on the original vibration signal to obtain the signal spectrum amplitude sequence {A i}, {i=1,2,...,N}, N is the number of sampling points;
[0031] Step 2 Determine the upper limit F of the signal analysis frequency band according to the equipment operating conditions and component parameter information, and obtain the analysis frequency range 0-F. The analysis frequency range 0-F contains 2-6 harmonics of the characteristic frequency. Mapping to its frequency division area, causing unnecessary false frequencies, and calculating the frequency F t Get 2-5 times of F, and less than half of the sampling frequency, in the present embodiment, F=1000Hz, F t = 2000Hz;
[0032] Step 3) From raw spectrum 0-F t In the frequency band amplitude sequence, all the spectral l...
Embodiment 2
[0040] Embodiment 2, with reference to figure 1 , a method for optimizing the frequency spectrum harmonic averaging of rotating machinery, comprising the following steps:
[0041] Step 1) Perform Fourier transform on the original vibration signal to obtain the signal spectrum amplitude sequence {A i}, {i=1,2,...,N}, N is the number of sampling points;
[0042] Step 2) Determine the upper limit F of the signal analysis frequency band according to the equipment operating conditions and component parameter information, and obtain the analysis frequency range 0-F. The analysis frequency range 0-F contains 2-6 harmonics of the characteristic frequency. The component is mapped to its frequency division area, causing unnecessary false frequencies, and the frequency F is calculated t Get 2-5 times of F, and less than half of the sampling frequency, in the present embodiment, F=200Hz, F t = 800Hz;
[0043] Step 3) From raw spectrum 0-F t In the frequency band amplitude sequence, a...
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