Design of an omnidirectional propulsion system for small jet-boats
Bibliographic record
Abstract
Jet-boats perform remarkably well at high-speed but lack low speed maneuverability for tight maneuvers such as ducking. This paper presents a low speed omnidirectional propulsion system controlled with a joystick for jet-boats. Two concepts are presented and evaluated. The first concept uses all original parts. The second concept uses a set of fix jet nozzles disposed around the hull. The position and angles of the nozzles are optimized with an index of omnidirectionality quality based on the projection of a set of force solutions on a shell with the shape of the desired force space. A 3D simulator backed by experimental results serves for the evaluation by potential customers of each design. The first concept exhibited poor maneuverability, as it offers ten times less force in sway than in surge. The optimized force space of the second concept is much more uniform, and was unanimously appreciated for its quality of low speed maneuverability. Both designs have been validated experimentally. The present work offers an omnidirectional propulsion system that is easy to enhance with advanced control laws. Velocity feedback control is given as example, and shows important improvement of maneuverability and robustness to miscalibration.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".