多操纵面无尾布局飞机横航向控制

通过风洞测力实验,研究了不同操纵面单侧作动和同步差动对无尾布局飞机横航向气动特性的影响.结果表明:在线性段,升降副翼和襟副翼正向单侧作动以及同步差动都具有一定的增升效果,全动翼尖单侧作动使得全机升力系数减小.操纵面作动对偏航力矩控制的规律性不明显,通过比较发现全动翼尖单侧作动对偏航力矩的控制效果要高于升降副翼和襟副翼作动.操纵面作动对滚转力矩具有较好的控制效果.升降副翼和襟副翼正向作动均会带来负的滚转力矩,舵偏角度越大负向滚转力矩越大.升降副翼作动对滚转力矩的控制效率高于襟副翼,全动翼尖作动对滚转力矩的控制效率较低.相比单侧作动,两侧同步差动可以提高滚转力矩控制效率.

Lateral-directional control of tailless aircraft with multiple control surfaces

The influence of control surfaces deflection on lateral-directional characteristics of a tailless aircraft with multiple control surfaces was investigated in a wind tunnel using force measurement. Both single deflection and simultaneous deflection of elevons and flaperons have a good effect of lift increment, while all-moving tips (AMTs) deflection leads to a reduction in lift before stall. The influence law of control surfaces deflection on the yawing moment control is not significant. However, single deflection of the AMT has a better effect on the yawing moment control than elevons and flaperons. Both single positive deflection and simultaneous positive deflection of elevons and flaperons result in a negative rolling moment, and the increment is much more significant with a larger deflection angle. Elevons have a better effect on the rolling moment control than flaperons, while AMTs have little influence on the rolling moment control. Besides, the control efficiency can be improved obviously adopting simultaneous deflection compared with single deflection.