| タイトル | An improved calibration technique for wind tunnel model attitude sensors |
| 著者（英） | Tcheng, Ping; Finley, Tom D.; Tripp, John S.; Wong, Douglas T. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1993-01-01
1993 |
| 言語 | eng |
| 内容記述 | Aerodynamic wind tunnel tests at NASA Langley Research Center (LaRC) require accurate measurement of model attitude. Inertial accelerometer packages have been the primary sensor used to measure model attitude to an accuracy of +/- 0.01 deg as required for aerodynamic research. The calibration parameters of the accelerometer package are currently obtained from a seven-point tumble test using a simplified empirical approximation. The inaccuracy due to the approximation exceeds the accuracy requirement as the misalignment angle between the package axis and the model body axis increases beyond 1.4 deg. This paper presents the exact solution derived from the coordinate transformation to eliminate inaccuracy caused by the approximation. In addition, a new calibration procedure is developed in which the data taken from the seven-point tumble test is fit to the exact solution by means of a least-squares estimation procedure. Validation tests indicate that the new calibration procedure provides +/- 0.005-deg accuracy over large package misalignments, which is not possible with the current procedure. |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 93A54356 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/314188 |
