Lateral-directional flying quality characteristics of high aspect-ratio combat flying wings
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摘要: 基于MIL-STD-1797A飞行品质规范,开展了针对大展弦比飞翼作战飞机滚转轴和偏航轴飞行品质特性的研究.随着控制系统对系统动态特性调节作用的日益增强,由飞机构型所引起的动态响应特性差异已变得越来越小,飞翼飞机的闭环滚转模态、螺旋模态、滚转-螺旋耦合振荡、荷兰滚模态、驾驶员座位处的侧向加速度等均可达到较好的飞行品质,但稳态配平特性主要受构型的影响,不能完全满足飞行品质的要求;分析了大展弦比飞翼作战飞机在快速滚转、侧风起降和非对称推力情形下的对滚转轴和偏航轴操纵效能的要求,由于气动构型和操纵面配置等差异,大展弦比飞翼作战飞机在完成某些飞行任务时对操纵效能的需求与常规构型的飞机存在着较大差异.Abstract: The roll and yaw axes flying qualities of high aspect-ratio combat flying wings were assessed, based on MIL-STD-1797A. With the adjustment and improvement provided by the proper-designed flight control system, the closed-loop dynamic response characteristics of flying wings, such as roll mode, spiral mode, roll-spiral coupling, dutch roll mode, lateral acceleration at pilot station and so on, were improved a lot inspite of the differenct configurations, but the static trimming characteristics can not entirely meet the criterion on account of the all-wing configuration. Roll axis and yaw axis control power requirements of roll maneuver, crosswind takeoff and landing, asymmetric thrusts were studied, and in some cases the control power requirements of combat flying wings are quite different with those of the conventional-configuration combat airplanes, due to the disappearance of vertical tail and rudders and the appearance of the new-style control effectors set.
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Key words:
- high aspect ratio /
- flying wing /
- flying qualities /
- control power
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