Modeling of the Six-Degree-of-Freedom Nonlinear Ground Dynamics of the Cessna Citation X
Bibliographic record
Abstract
This paper presents a detailed methodology developed at the Laboratory of Applied Research in Active Controls, Avionics, and AeroServoElasticity (LARCASE) to develop the six-degree-of-freedom ground dynamics of the Cessna Citation X (CCX) business aircraft. A highly nonlinear model for ground reaction forces (i.e., horizontal, lateral, and vertical forces) was designed based on an in-house longitudinal ground dynamics model and also considering lateral motion. Furthermore, two new ratios using the angular momentum theorem around the roll and pitch axes were developed to obtain reaction forces, first between the nose and the main landing gears and then between the right and left main landing gears. Finally, based on the landing gear model and its deflections, two trigonometric equations were used to estimate the Euler angles in both roll and pitch motions. The yaw angle was calculated using the sum of ground moments around the [Formula: see text]-axis, incorporating the steering moment. This methodology was tested and validated using the CCX Level-D Research Aircraft Flight Simulator (RAFS). Compared with the RAFS data, the proposed model provided an excellent prediction of the CCX aircraft’s ground performance.
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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".