Unbalanced signal extraction method based on variable-sampling-length correlation filtering
A technology of balanced signal and correlation filtering, which is applied in static/dynamic balance test, machine/structural component test, special data processing application, etc. Accurate, unable to distinguish near-frequency interference and other problems, to overcome the ability to resist near-frequency interference, shorten the phase accuracy, and eliminate the effects of near-frequency interference
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[0025] In conjunction with accompanying drawing, the present invention is described in detail below:
[0026] Such as figure 1 , the signal processing system includes two parts, the hardware part and the software part. The hardware part performs anti-aliasing filtering of the vibration signal, program-controlled gain adjustment, frequency multiplication tracking sampling, pulse shaping of the speed signal, and frequency multiplication tracking sampling; the software part first performs digital tracking filtering on the sampling signal, and estimates the MUSIC power spectrum to obtain the frequency of near-frequency interference, Calculate the sampling length, and then extract the unbalanced signal according to the sampling length multiplied frequency tracking sampling, digital tracking filtering, and correlation filtering, and calculate and output the amplitude and phase of the unbalanced signal.
[0027] The collected vibration signal is the sampling signal obtained from the...
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