Observer-based spacecraft attitude tracking with guaranteed performance bounds
Why this work is in the frame
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Bibliographic record
Abstract
Recently, a sequential Lyapunov technique has been developed for the purpose of determining non-conservative steady-state performance bounds for rigid spacecraft attitude tracking. In particular, given known bounds on disturbance torques and uncertainties in the spacecraft inertia matrix, non-conservative ultimate bounds were obtained for the attitude tracking error assuming that the attitude and angular velocity are measured with known bounds on the measurement errors. In this paper, these results are extended to the case where the attitude and angular velocity are not measured, but estimated using an observer. Specifically, it is shown that given any attitude and angular velocity observer with known ultimate bounds on the estimation errors, the previously developed expressions for the ultimate bounds on the tracking error remain valid with observer-based control, provided the ultimate bounds on the estimation errors are used in place of the previously fixed bounds on the measurement errors. A numerical example of attitude tracking using a gyro and a single vector measurement demonstrates the utility of the proposed technique.
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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 | 0.000 |
| 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 it