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A Micro Aircraft With Passive Variable-Sweep Wings
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https://ieeexplore.ieee.org/abstract/document/9706283 传统的固定翼飞行器配备多个主动气动控制面以实现飞行控制。这不可避免地需要多个执行器,使机械结构复杂,并且对于小型飞行器而言,会对飞行效率产生不利影响。作为一种轻量级和高效的解决方案,本文提出采用被动可变展翼设计来代替主动控制面,同时保持有效的俯仰机动性能。根据螺旋桨产生的推力,翼面会被动地来回展开,重新定位压力中心并影响俯仰力矩。推力产生的变形代替了升降舵进行俯仰控制。通过气动建模,分析了所提出飞行器的飞行动力学。结果表明,所提出的设计带来了放大和加速的俯仰响应。最后,我们构建了一个原型来演示和验证增强飞行器的俯仰控制能力。 Traditional fixed-wing vehicles are equipped with multiple active aerodynamic surfaces for flight control. This inevitably necessitates several actuators, complicates the mechanical structure, and adversely impacts the flight efficiency, particularly for small aerial vehicles. As a lightweight and efficient solution, this work proposes to employ passive variable-sweep wings on a micro airplane to eliminate the need for active control surfaces while retaining effective pitch maneuverability. Depending on the thrust produced by the propellers, the wings passively sweep back and forth, relocating the center of pressure and affecting the pitch moment. The thrust-induced deformation substitutes the elevators for pitch control. Through aerodynamic modeling, the flight dynamics of the proposed vehicle is analyzed. The results show that the proposed design brings about amplified and accelerated pitch response. Lastly, a prototype was constructed to demonstrate and verify the enhanced aircraft’s pitch control ability.
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