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基于某无人机的载重任务特点和要求,提出和分析了一种通过利用载重物调节无人机任务阶段重心位置,改善爬升和下滑阶段升阻特性来提高性能的方法。推导了重心位置变化与配平升力线斜率、升致阻力系数之间的关系。分析了通过调节重心位置改善爬升和下滑阶段升阻特性,从而提高性能的可行性;并结合实际模型进行了爬升与下滑阶段升阻特性计算。通过与任务阶段重心位置始终保持不变设计方案的对比,得出了通过调节重心位置可有效改善飞机爬升和下滑阶段升阻特性,提高性能的结论。
Based on the characteristics and requirements of a UAV payload task, a method is proposed and analyzed to improve the performance by using the load to adjust the center of gravity of the UAV during the mission phase, and to improve the rise and drag characteristics in the climb and fall phases. The relationship between the change of the center of gravity and the slope of the lift line, and the drag coefficient of the lift line are deduced. The feasibility of improving the performance is analyzed by adjusting the position of the center of gravity to improve the characteristics of the rise and fall during the climb and fall phases. The lift-drag characteristics of the climb and fall phases are calculated based on the actual model. By comparing with the design scheme that the position of the center of gravity of the task remains unchanged, the conclusion that the position of the center of gravity can effectively improve the drag-and-drop characteristics during the climb and slip phase and improve the performance is obtained.