| タイトル | Maximum likelihood identification of aircraft parameters with unsteady aerodynamic modelling |
| 著者（英） | Keskar, D. A.; Wells, W. R. |
| 著者所属（英） | Wright State Univ.|Cincinnati Univ. |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | A simplified aerodynamic force model based on the physical principle of Prandtl's lifting line theory and trailing vortex concept has been developed to account for unsteady aerodynamic effects in aircraft dynamics. Longitudinal equations of motion have been modified to include these effects. The presence of convolution integrals in the modified equations of motion led to a frequency domain analysis utilizing Fourier transforms. This reduces the integro-differential equations to relatively simple algebraic equations, thereby reducing computation time significantly. A parameter extraction program based on the maximum likelihood estimation technique is developed in the frequency domain. The extraction algorithm contains a new scheme for obtaining sensitivity functions by using numerical differentiation. The paper concludes with examples using computer generated and real flight data |
| NASA分類 | AERODYNAMICS |
| レポートNO | 79A19710
AIAA PAPER 79-0400 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/428806 |
