Method for extracting time-frequency domain spectrum of mixed signals of rotating machinery
A mixed-signal, rotating machinery technology, applied in the field of signal processing, can solve problems affecting the scope of application, and achieve the effect of fast and accurate extraction and reduced interference
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[0027] refer to figure 1 , the time-frequency domain spectrum extraction method of a kind of rotary machinery mixed signal provided by the invention, it comprises the steps:
[0028] Step 1: Perform normalized preprocessing on the collected vibration signals to obtain normalized vibration signals:
[0029] S n ( t ) = ( S ( t ) - S ‾ ) / std ( S ( t ) )
[0030] Among them, S n (t) and S(t) represent the normalized vibration signal and the original vibration signal, respectively, Indicates the mean value of the original vibration signal, and std(S(t)) indicates the standard deviation of the or...
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