Multidirectional KICA intermittent process fault monitoring method based on independent subspaces
A technology of independent subspace and fault monitoring, applied in program control, electrical test/monitoring, test/monitoring control system, etc., can solve the problems of decreased monitoring rate and insignificant monitoring effect.
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[0124]The present invention will be further elaborated below in conjunction with the accompanying drawings of the description.
[0125] A kind of multi-directional KICA intermittent process fault monitoring method of independent subspace division of the present invention, comprises the following steps:
[0126] 1) Collect the 3D data X (I×J×K) of the intermittent process, apply multi-directional KICA, and expand the 3D data into 2D data in batches for processing;
[0127] 2) Carry out offline modeling of the two-dimensional data expanded by batches, add kernel techniques on the basis of ICA, map the nonlinear data to the high-dimensional feature space, and then perform linear processing in the high-dimensional space;
[0128] 3) Apply T 2 and SPE statistics to monitor the process online; summarize the fault information obtained from each sub-data, and calculate whether the statistics exceed the limit.
[0129] In step 1), such as figure 2 As shown, the three-dimensional pr...
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