Research Article
Improved Dynamic Optimized Kernel Partial Least Squares for Nonlinear Process Fault Detection
Offline phase: | (1) | Initialize | The initial data X and Y | The reduced set of data | The SPE index of reduced observations | The number of LVs and the reduced Gram matrix | Online phase: | (2) | ; | (3) | Acquire a new observation ; | (4) | Calculate the SPE index using equation (25); | (5) | If is satisfied, then go to step 6; otherwise, return to step 2; | (6) | If the condition presented by equation (20) is satisfied, then go to step 7. Otherwise, return to step 2; | (7) | Update the matrix of reduced data; | (8) | Update the reduced Gram matrix; | (9) | Update the SPE index; | (10) | Update the LVs and return to step 2; |
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