A fault diagnosis method for rotating machinery in nuclear power plants based on long short-term memory and temporal convolutional networks
Bibliographic record
Abstract
Vibration signals typically used for health monitoring of rotating machinery has highly integrated spatio-temporal correlations. However existing studies rarely explore the impact of spatial correlation features of rotating machinery internal components on their vibration signals. To identify the health condition of rotating machinery in NPPs in terms of spatial–temporal correlation, we propose a fault diagnosis method with combination of the long short-term memory and temporal convolutional networks. The spatial and temporal features in the vibration signals of rotating machinery are extracted using the two networks and then fused to diagnose its faults. The model was assessed against the Case Western Reserve University bearing dataset, University of Ottawa bearing dataset and Southeast University gearbox dataset. The results show that its diagnostic accuracy reaches up to 99.56 %, 100 %, and 100 % on the three datasets, respectively, and outperforms other five well-designed comparative models, demonstrating its effectiveness and superiority in rotating machinery fault diagnosis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".