A real time on orbit calibration for redundant gyros of launch vehicle upper stage
Bibliographic record
Abstract
With regards to the fourth stage rocket, upper stage flight time can be up to 48 hours. Volatile space environment leads parameters calibrated in ground do not meet the requirements of the spacecraft precise orbit. In this paper, a real-time on-orbit calibration method of redundant laser gyro inertial measurement unit for space transfer vehicle is proposed. We make use of the high precise attitude information from star sensor to design a calibration model with ten inertial instruments (five gyros and five accelerometers), which includes gyros drift, and scale factor error. The redundant gyros of strapdown inertial measurement unit parameters are estimated through Kalman filter and Sage-Husa adaptive filter. For this, we conduct numerical simulation. That the result of the parameters calibration precision is within 5% demonstrates the validity of this method on satisfying the navigation system's reliability and accuracy with the estimation and compensation for gyros error. The on-orbit calibration method provides a theoretical reference for the higher precise attitude determination of space transfer vehicle.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".