舵面特性对飞翼构型作战飞机短周期品质的影响

Influence of Control Surface Characteristics on Short Period Mode Flying Qualities for Flying Wing Aircraft

飞翼构型作战飞机采用无尾翼身融合布局,由于取消了平尾,使其稳定性及阻尼特性下降,需要操纵面具有良好的舵面特性才能保证其获得满意的飞行品质。采用3种不同的短周期飞行品质评定方法,评定小展弦比飞翼构型飞机在不同舵面特性组合情况下的飞行品质,并总结了舵面特性与短周期飞行品质等级间的关系,给出了依据操纵导数和舵面偏转速率大小所划分的品质优劣边界。结果表明,舵面特性变差将导致飞翼构型飞机的短周期飞行品质恶化。研究方法及结果可用于指导此类新布局飞机的初步设计和飞行品质的评定。

Flying wing combat aircraft adopts a tailless blended-wing-body configuration,which leads to the decline of stability and damping. Therefore the control surface must possess good characteristics to ensure good flying quality in the short period mode. Three flying quality criteria are adopted to assess the flight quality of a low-aspect-ratio flying wing aircraft with different control surface characteristics, and the relationship between control surface characteristics and short period flying quality grade is summarized. The short period flying quality boundary assessed by the control derivative values and deflexion rate is introduced. The result indicates that the flight quality of the flying wing aircraft tends to become worse if the control surface exhibits poor performance characteristics. The research method and results can be used to guide the preliminary design and flying quality evaluation of new configuration aircraft.