| タイトル | Shuttle entry trajectory reconstruction using inflight accelerometer and gyro measurements |
| 著者（英） | Findlay, J. T.; Blanchard, R. C.; Compton, H. R. |
| 著者所属（英） | NASA Langley Research Center|Analytical Mechanics Associates, Inc. |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | An error analysis has been made of a Shuttle postflight entry trajectory reconstruction process to obtain trajectory state estimation errors and to assess the impact of these errors on Shuttle aerodynamic force coefficient extraction. In this analysis, the entry trajectory is assumed to be reconstructed via numerical integration of onboard accelerometer and gyro measurements and constrained to satisfy ground-based radio tracking. The trajectory state estimation errors are calculated using a Kalman-Schmidt sequential filter assuming various measurement error models and combinations of ground-based tracking. The resultant trajectory estimation errors are analyzed in a simplified perturbation process to establish the accuracy to which postflight aerodynamic force coefficients can be determined. Results are presented which show that the principal error sources affecting the trajectory reconstruction and thus the force coefficient extraction, assuming perfect atmospheric density knowledge, are the accelerometer and gyro resolution, acceleration-sensitive gyro drifts, and the alignment uncertainties associated with integration on the Shuttle. |
| NASA分類 | ASTRODYNAMICS |
| レポートNO | 79A19626
AIAA PAPER 79-0257 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/428834 |
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