ITD equipment fault diagnosis method and system
A diagnosing method and equipment fault technology, applied in the field of ITD equipment fault diagnosing method and system, can solve the problems of discontinuous data segment, fractal structure damage of original signal, manual determination of analysis scale, etc.
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[0114] Examples such as figure 1 , figure 2 Shown, a kind of ITD equipment fault diagnosis method comprises the following steps:
[0115] 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;
[0116] 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;
[0117] 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;
[0118] Step 4: Determine c f The local maximum value and local minimum value of (k...
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