Effects of yaw-roll coupling ratio on the lateral-directional departure prediction and restraint

作     者：Lin SHEN Da HUANG Genxing WU 

作者机构：College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2019年第32卷第10期

页      面：2239-2253页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.11872209) 

主　　题：Lateral-directional departure Stability augmentation system Stability criterion Unsteady aerodynamics Yaw-roll coupling 

摘      要：The experimental data obtained from yaw-roll coupled wind tunnel tests are used for lateral-directional departure prediction,by linearizing the_b model to extract nominal dynamic derivatives at each coupling *** prediction results are compared with those of the existing engineering methods which are based on the conventional aerodynamic *** comparison shows that the yaw-roll coupling ratio has a great influence on the departure *** departure resistance will loss in partial region of the coupling ratio when the angle of attack is higher than a critical *** to the stable and unstable regions of coupling ratio,a two-segment stability augmentation system with two different feedback gain matrices is obtained by pole-placement *** two-segment stability augmentation system is used in the simulations of straight and level flight,steady turn,spin recovery and Herbst *** simulation results are also compared with the applications of a fixed-gain stability augmentation system designed by the conventional aerodynamic *** the yaw-roll coupling effects are fully considered,the two-segment stability augmentation system is more effective for departure restraint and can provide a better flying quality with less control energy.