小展弦比飞翼战机滚转轴操纵效能需求特性

Requirement characteristics of low-aspect-ratio combat flying wings' roll axis control power

基于MIL-STD-1797A中关于Ⅳ类飞机的飞行品质规范,对小展弦比飞翼战机的滚转轴操纵效能进行了研究.建立了滚转性能要求和滚转操纵效能要求之间的关系,由于翼身融为一体,飞翼的滚转轴转动惯量通常比常规战斗机大很多,因此其对滚转轴操纵效能的需求更大;由于取消了垂尾,小展弦比飞翼的横向静稳定性较小,操纵面偏转产生的侧力也较小;由于采用多组新型操纵面及控制分配技术,飞翼战机可以实现三轴操纵解耦;因此在侧风起降、非对称装载情形下,与常规飞机相比,小展弦比飞翼战机对滚转轴操纵效能的需求具有诸多新特点.

The roll axis control power of low-aspect-ratio flying wings were assessed based on the criteria for Class Ⅳ aircraft presented in MIL-STD-1797A. The relationship of the roll performance requirement and the roll axis control power requirement was provided. Low-aspect-ratio flying wings need more roll axis control power with the same roll performance requirement, because of the all-wing configuration and the lager rolling moment of inertia. Without the vertical tail＇s contribution, the static lateral stability and control side force of the flying wing are less than those of the conventional combat aircraft, and with the application of innovative control effectors and the control allocation technology, low-aspect-ratio flying wings can achieve the decoupling control. As a result, the roll axis control power requirements of the flying wing for takeoff and landing in crosswinds and for asymmetric loading, have a lot of new characteristics in contrast with those of the conventional - configuration aircraft.