Observer-based finite time control for spacecraft attitude stabilization
Why this work is in the frame
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Bibliographic record
Abstract
A novel time-varying sliding mode control based finite-time controller incorporated a modified second-order disturbances observer/differentiator is proposed for a rigid spacecraft attitude stabilization control system. Firstly, a modified observer is designed to estimate the time-varying sliding mode manifold and the combined disturbances caused by external disturbances, spacecraft inertia uncertainties and actuator misalignments. Then based the estimated values derived from the observer, a finite-time controller and an adaptive law for the time-varying variable gain are presented, and Lyapunov stability analysis shows that finite-time convergence of the uncertain spacecraft attitude control system to the equilibrium point can be accomplished with great robustness to disturbances and uncertainties. Numerical simulation results for the orbiting rigid spacecraft model show fine performance, which validates the effectiveness and feasibility of the proposed scheme.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.001 | 0.001 |
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