农林飞机近地作业飞行的横航向稳定特性  

Lateral Stability of an Agriculture Aircraft During Low-altitude Flight Operation

作　　者：乐挺[1] 王立新[1] 况龙 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083 [2]洪都航空工业集团,江西南昌330024

出　　处：《航空学报》2008年第4期853-858,共6页Acta Aeronautica et Astronautica Sinica

摘　　要：分析了地面效应对飞机产生附加滚转和偏航力矩的气动新机理,研究了农林飞机近地作业飞行时横航向气动特性随高度的变化规律,推导了考虑地面效应影响时的飞机横航向静稳定性新准则,并分析了不同飞行高度时这些静稳定性的变化趋势。采用地效区内飞机的运动方程,计算并分析了农林飞机不同作业高度下的横航向模态特性及变化规律,并进行了模态特性的简化和验证分析。The new aerodynamic principle of additional rolling and yaw moment of aircraft in ground effect is analyzed.And the lateral aerodynamics＇ changing regularity with height of an agriculture aircraft during low-altitude flight operation is presented.A new criterion of lateral static stability in ground effect is deduced,and the change trend of lateral static stability on different heights is analyzed.Using the lateral equations of aircraft in ground effect,the properties of lateral modes of an agriculture aircraft with variations of height during low-altitude flight operation are calculated,and the modes＇ changing regularity is analyzed.The lateral modes are approximately simplified and the rationality is verified by numerical simulation.

关 键 词：农林飞机 近地 地面效应 模态简化 横航向稳定性 

分 类 号：V212[航空宇航科学与技术—航空宇航推进理论与工程]