Automatic Feedback Control of Mechanical Gas Face Seals via Clearance Control
Why this work is in the frame
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Bibliographic record
Abstract
AbstractA new analytical approach is presented for designing controllers to regulate the axial clearance of a coned-face flexibly mounted stator mechanical gas face seal. The seal axial clearance is controlled by regulating the back-pressure force acting on the stator. The controllers are systematically designed using a completely analytical seal system model in which the linearized gas film stiffness and damping properties are represented by a constitutive model. An algorithm based on this model is derived to calculate the critical axial clearance where the seal is marginally stable, and a stable reference axial clearance is chosen. Proportional and proportional-plus-integral controllers are designed and analytically studied in terms of closed-loop stability and speed of response using the system model. The controllers are verified using a full numerical simulation (including nonlinear effects) of the mechanical gas face seal system, and the results demonstrate the effectiveness of both controllers to maintain the reference axial clearance.KEY WORDS: Mechanical Gas Face SealsStabilityControl NotesPresented at the STLE 59th Annual Meeting in Toronto, Ontario, Canada
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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