面向复杂构型飞机的非定常气动力建模与辨识
收稿日期: 2016-01-25
修回日期: 2016-03-14
网络出版日期: 2016-04-06
Unsteady aerodynamic modeling and identification for a complicated aircraft configurations
Received date: 2016-01-25
Revised date: 2016-03-14
Online published: 2016-04-06
杨文 , 卜忱 , 眭建军 , 尚祖铭 . 面向复杂构型飞机的非定常气动力建模与辨识[J]. 航空学报, 2016 , 37(8) : 2464 -2471 . DOI: 10.7527/S1000-6893.2016.0094
Adequate modeling of nonlinear and unsteady aerodynamics at high angle of attack flight is important for the design of future fighters with high maneuverability and stealth as well as for the improved prediction of normal aircraft configuration's dynamics. The limitations for conventional aerodynamic derivatives model based on longitudinal small amplitude experimental date and large amplitude experimental date at high angle of attack had been analyzed. The dynamic linear and nonlinear aerodynamic model approximating the vertical and separated flow time lag effects is considered along with the conventional aerodynamic model. Using the model the unsteady aerodynamics of one aircraft in typical maneuver simulation tests is predicted. It is suggested that the structural modification of nonlinear differential equation model proposed in this paper is valid in different maneuvers for complicated aircraft configurations, which bears proof on the practicality of the flight dynamics analysis.
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