Fault-tolerant control of a servohydraulic positioning system with crossport leakage
Why this work is in the frame
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Bibliographic record
Abstract
This brief details the design of a fault-tolerant control (FTC) scheme for a servohydraulic positioning system with a faulty actuator piston seal that introduces internal (crossport) leakage between the actuator chambers. It is shown that the leakage fault changes the plant type from 1 to 0, decreases the open-loop gain, and increases the effective damping. A fixed-gain linear time-invariant control law is synthesized via quantitative feedback theory (QFT) to guarantee satisfaction of a priori-defined reference tracking and stability requirements, despite the occurrence of the leakage fault. Experiments verify the ability of the designed fault-tolerant controller to compensate for the degrading effects of this fault. Experiments also demonstrate the superior tracking performance of the FTC scheme as compared to a control loop in which the effects of the leakage fault are not considered in the controller design.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 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