ITD and GZC machine state monitoring method and device
A machine state and algorithm technology, applied in measuring devices, instruments, computer parts, etc., can solve problems such as difficulty in determining the order of fitting polynomial trends, damage to the fractal structure of the original signal, and manual determination of the analysis scale.
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[0117] Examples such as figure 1 , figure 2 Shown, a kind of ITD and GZC machine state monitoring method are characterized in that: comprise the following steps:
[0118] Step 1: Use the acceleration sensor to measure the equipment vibration signal x(k) at the sampling frequency fs, k=1, 2, ..., N, N is the length of the sampling signal;
[0119] Step 2: Use the Intrinsic Time-scale Decomposition (ITD) algorithm to decompose the signal x(k) into the sum of n components and a trend item, namely , where c i (k) represents the i-th component obtained by the ITD algorithm, r n (k) represents the trend item obtained by the ITD algorithm, in this example, n=10;
[0120] Step 3: Use nonlinear discriminant algorithm to exclude noise components and trend items from ITD decomposition results, and retain components containing fractal features c f (k), f=1,2,...,p, p represents the number of remaining components after filtering;
[0121] Step 4: Determine c f The local maximum va...
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