固旋翼无人机垂直起降阶段抗风特性及其影响因素

为了评估四旋翼固定翼垂直起降复合布局无人机(简称固旋翼无人机)垂直起降阶段的抗风性能,本文以固旋翼无人机垂直起降阶段在风场中保持稳定为基础建立了抗风特性分析方法。以某双尾撑固旋翼无人机为算例,利用所提方法分析了该无人机抗风特性及其影响因素,分析结果表明该无人机在机头来流的工况下具有很强的抗风能力,侧面来流工况下无人机抗风能力较差,可以通过增加旋翼桨盘倾角、改变旋翼电机相对于重心的位置、优化尾翼等部件的气动外形等方法来改善无人机抗风能力。飞行试验验证了所提方法的可行性和分析结果的准确性。

Wind resistance and influencing factors of quadrotor fixed wing vertical take off and landing hybrid unmanned aerial vehicle

In order to evaluate the wind resistance of quadrotor fixed wing vertical take off and landing (VTOL) hybrid unmanned aerial vehicle (QFHAV) during the VTOL process, this paper proposes a method to analyze the wind resistance based on the QFHAV’s maintaining stability in windy conditions. Taking a twin boom QFHAV (TB-QFHAV) product as an example, this paper analyzes the wind resistance of the TB-QFHAV and the influencing factors using the proposed method. The analysis results indicate that the TB-QFHAV has strong wind resistance under the head wind situation and it has poor wind resistance under the crosswind situation. The wind resistance under the crosswind situation can be improved by increasing the angle of propeller disc of the quadrotor, extending the distance between the installation position of the quadrotor propeller disc and the center of gravity and optimizing the vertical tail. The flight test verifies the feasibility of the proposed method and the correctness of the analysis results.