Design of small highly maneuverable airships
Why this work is in the frame
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Bibliographic record
Abstract
The aim of this thesis is to develop the theoretical framework that integrates airship size minimization, maneuverability quantification and optimal actuator placement for small highly maneuverable airship design. The size minimization method is proposed in the first part of the thesis. The sizing flow chart is provided along with a comprehensive description and computationof four principle subsystems in airship sizing. The relationships between different subsystems are also illustrated. Novel technologies that could be applied for airship subsystems are discussed and included in the proposed sizing methods. The sizing method is validated by computing the minimum size of non-rigid airships with and without fins. Based on the research to date conducted on ships, aircrafts and airplanes, the airship maneuverability quantification method is proposed in the second part of this thesis. The maneuver tests used to assess airship maneuverability include straightforward maneuver, turning maneuver and zig-zag maneuver. This maneuverability quantification method is first applied to the small highly maneuverable airship called ALTAV available in the Aerospace Mechatronics Lab at McGill. Based on above suggested maneuvering tests, four maneuvers are designed to test ALTAV's performance with different actuator locations: the 360â¦turning maneuver using PID control, the zig-zag maneuver using PID control, the straight forward maneuver using optimal control and 180â¦turning maneuver using optimal control. In the third part of this thesis, aiming to understand the influence of actuator locations and find the optimal actuator locations to provide the best maneuverability for ALTAV, the effect of actuator locations on all the elements in the dynamics model of ALTAV are analyzed, especially the effect on the entries of the inverse mass matrix are formulated through symbolic equations. Then, in order to explore the effect of actuator locations on straight forward maneuver and turning maneuver, the control forces and moments, the maximum available accelerations and angular accelerations are analyzed. The cost function used to find the optimal actuator locations is proposed based on these analysis and the optimal actuator locations fit for equal importance of longitudinal and lateral maneuvers are selected at the end of the thesis.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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