太阳能无人机功率-能量平衡计算的参数化分析

Parametric Analysis of Power-energy Balance Calculation of Solar UAV

大展弦比太阳能无人机大部分任务时间段是以最佳升阻比状态巡航,尽量提高其持续任务高度、时长是十分重要的。基于长航时无人机的大展弦比结构,以功率-能量平衡关系推导了单位太阳能电池面积与飞行高度、太阳能电池比质量、蓄电池充放电效率、电池能量密度等参数的关系,分析了翼型弯曲几何对机翼气动效率的影响,着重考虑奥斯瓦尔德系数随翼型参数变化的量纲关系,对各个系数通过参数化计算,简化了计算,可以为后续长航时太阳能无人机的设计与优化提供帮助。

The large aspect ratio solar drones are cruising at the optimal lift-to-drag ratio during most mission periods,and it is important to increase the duration of their missions as much as possible.Based on the large aspect ratio structure of the long-range UAV,the relationship between the unit solar cell area and the flying height,the solar cell specific mass,the battery charging and discharging efficiency,and the battery energy density are derived based on the power-energy balance relationship.The influence of airfoil bending geometry on the aerodynamic efficiency of the wing is analyzed.The dimensional relationship between the Oswald coefficient and the airfoil parameter is considered.The calculation of each coefficient by parameterization simplifies the calculation and can be used for subsequent long-haul solar energy.The design and optimization of the drone is helpful.