Control Valve Stiction Detection using Learning Vector Quantization Neural Network
Why this work is in the frame
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Bibliographic record
Abstract
The performance of a process control loop can be limited when nonlinear problems like deadband, hysteresis, backlash, stiction, etc. exist in control valve. Stiction occurs more frequently than the other valve problems and has potential to cause adverse oscillations in the control loop, resulting in poor quality products, excessive use of raw materials and energy, and an environmental footprint. Timely detection of sticky control valves can help control engineers to take appropriate actions (retuning the controller or using stiction compensation methods) to prevent further degradation of the performance of the control loop. In connection with the aforesaid fact, this work proposes a novel stiction detection method founded on learning vector quantization neural network (LVQNN). Simulated database is generated and used to train the LVQNN with the training algorithm: LVQ2.1. To further enhance the performance of the method, transfer learning is adopted to retrain the pre-trained LVQNN model by using industrial data. The retrained LVQNN is tested on practical data obtained from a wide variety of industries. Results highlight that the proposed method can outperform the existing methods.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 it