Ensemble clustering for fault diagnosis in industrial plants
Bibliographic record
Abstract
In this paper, we propose an unsupervised ensemble clustering approach for fault diagnosis in industrial plants. The basic idea is to combine multiple base clusterings of operational transients of industrial equipment, when the number of clusters in the final ensemble clustering (P*) is unknown. In practice, a Cluster-based Similarity Partitioning Algorithm (CSPA) is employed to quantify the co-association matrix that describes the similarity among the different base clusterings and, then, a Spectral Clustering technique embedding an unsupervised K-Means algorithm is used to find the optimum number of clusters of P* based on Silhouette validity index calculation. The identified clusters allow distinguishing different operational behaviors of the equipment. The proposed approach is verified with respect to an artificial case study representative of the signal trend behavior of an industrial equipment during shut-down operations. The obtained results have been compared with those achieved by a state-of-art approach, known as Cluster-based Similarity Partitioning and Serial Graph Partitioning and Fill-reducing Matrix Ordering Algorithms (CSPA-METIS): the results show that the novel approach is able to identify the final ensemble clustering with a lower misclassification rate than the CSPA-METIS approach.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".