小展弦比飞翼布局作战飞机偏航轴飞行品质评定  

Directional Axis Flying Qualities Assessment of Low Aspect-ratio Combat Flying Wings

作　　者：李林[1] 王立新[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《航空学报》2009年第6期972-978,共7页Acta Aeronautica et Astronautica Sinica

基　　金：教育部"新世纪优秀人才支持计划"

摘　　要：依据MIL—STD—1797A飞行品质规范,对小展弦比飞翼布局作战飞机的偏航轴飞行品质进行了评定研究。评定结果表明:由于构型的原因,飞翼布局飞机本体的稳定特性和阻尼特性都较差,因此飞行控制系统对其动态响应特性的调节作用更加明显。稳态配平特性主要受构型的影响,飞翼布局飞机一般不能完全满足飞行品质的要求。由于可控性的设计要求需采用多操纵面的组合操纵,控制分配技术导致某些现有的品质准则需要修改。小展弦比飞翼布局飞机取消了垂尾(方向舵)并采用了新型操纵面(ICE),在某些情形下对偏航轴操纵效能的需求与常规飞机相比存在较大的差异。总之,在飞翼布局作战飞机的构型设计、飞控系统设计以及飞行品质评定条款的制定、实施中,均需考虑这些新的飞行品质特性。The directional axis flying qualities of low aspect-ratio combat flying wings were assessed in accordance with MIL--STD-1797A, and the evaluation results indicate the following aspects. The stability and damping of the low aspect-ratio flying wing is found to be poor due to the unusual configuration, and the closed-loop dynamic response characteristics such as Dutch-roll mode and sideslip magnitude depend much more on the flight control system. However, owing to the special aerodynamic configuration, the static trimming characteristics cannot entirely meet the criterion for flying qualities. Most low aspect-ratio flying wings have several redundant control surfaces, and the control allocation leads to the need to modify of some existing criterions. In some cases, the control power requirements of flying wings are quite different from those of the conventional-configuration fighters, which is a result of the disappearance of the vertical tail and rudders and the appearance of innovative control effectors （ICE）. In sum, those new flying quality characteristics must be concerned in the design of flying wings＇ configuration and flight system design and the enaction and implement of flying quality criterions.

关 键 词：小展弦比 飞翼 飞行品质 低阶等效系统 控制系统 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程]