某无人机基于载重任务的重心位置配置分析

Analyze the C.G of a UAV Based on Load Task

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 task features of a UAV＇s load mission requirements,it proposes and analyzes a way to improve the performance of UAV by using the physical load to adjust the c.g of the model aircraft during the mission phase.The climb and decline stages of lift-drag features is improved,and derived the relationship between trim lift induced drag and lift slope caused by the change of center of gravity.The feasibility of improving the lift-drag characteristics during climb and fell stage by adjusting the position of center of gravity is analyzed,calculated the lift-drag characteristic during the climb and decline stage by combining with the actual model.By comparing with the program that the c.g keeps unchanged during the mission,the conclusion is that adjusting the center of gravity can improve the performance of the aircraft climb and down performance.