Control of Penetration Rate in Distributed Parameter Rotary Drilling Systems
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Bibliographic record
Abstract
This paper deals with control of vertical penetration rate in a spatially distributed rotary drilling system with limited measurements at the bottom level and unknown parameters of the rock-bit interaction. Rotational dynamics of the drilling system are represented using an infinite-dimensional model. A control algorithm which allows for regulation of the vertical penetration rate to a desired constant level is presented. The proposed algorithm has a cascaded structure and consists of two parts. First, a reference signal for the rotational velocity of the drill bit is derived based on the speed gradient method. Second, an algorithm for tracking of reference velocity signal by the distributed parameters rotational dynamics is designed which involves an infinite-dimensional reference model and a disturbance observer. Stability of the closed-loop system is proved using Lyapunov method. Efficiency of the obtained results is illustrated by simulations.
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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 | 0.001 |
| 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