电动多旋翼垂直起降飞行器最优续航性能分析

Analysis on the Maximum Endurance and Range of Multi-rotor eVTOL Aircraft

采用动量理论计算电动多旋翼垂直起降飞行器悬停和前飞的需求功率;采用Peukert模型模拟电池放电,建立了电动多旋翼垂直起降飞行器最优续航性能分析方法;基于某型六旋翼电动垂直起降飞行器平台,对最优续航性能进行了分析。结果表明,悬停和匀速前飞均存在最优的电池重量比2,使得续航时间最大,且该比值与电池性能参数无关;对于续航里程,最优电池重量比与电池Peukert系数n有关。为获得飞行器重量和续航性能之间的平衡,电池重量比需低于最优电池重量比。

This paper presented an analytical framework for addressing the maximum endurance and range of multi-rotor electric vertically taking-off and landing(eVTOL)aircraft.The required power was calculated with the momentum theory.The battery discharge was modeled with Peukert model.The maximum endurance and range of a six-rotor eVTOL aircraft was analyzed.The results indicated that the best endurance condition for hovering and level flight could be obtained when the battery weight ratio was 2,which was independent to the battery parameters.For maximum range,the optimal battery weight ratio was dependent on the Peukert coefficient.To impose the balance between weight and endurance of a multi-rotor eVTOL aircraft,the selected battery weight ratio was normally lower than its optimal value.