超轻型电动飞机电动力系统的参数匹配

结合某型超轻型电动飞机的设计参数，阐述了电动力系统的布局、系统参数匹配的原则和步骤.提出了电动力系统参数匹配和性能验证的方法.从动力性、经济性、系统质量的角度验证了该系统的可行性.参考飞机的最大平飞速度为175.5km/h，大于设计要求的最大平飞速度170km/h，满足动力性能要求.电动力系统的运行费用为6.8元/h，是相近功率活塞发动机运行费用的1/8.与3种电动飞机相比，参考机型的功质比仍比较高，达0.0842kW/kg，为可接受值. 

Parameters matching of ultralight electric aircraft propulsion system

Combined with a certain ultralight electric aircraft's design parameters, the layout of aircraft electric propulsion system, the principles and steps of the parameter matching of electric propulsion system were presented. The methods of parameter matching and performance verification of electric propulsion system were put forward. The feasibility of the system was verified from the mass of propulsion system, dynamics and economics. The maximum level flight speed of the reference aircraft is 175.5km/h, greater than the maximum level flight speed of 170km/h, which is design requirement, in compliance with the requirement of dynamic performance. The operation cost of electric propulsion system is RMB 6.8 yuan/h that is close to the 1/8 of the operation cost of piston engine with similar power. Compared with three electric aircrafts, the reference aircraft's power to mass ratio is still high up to 0.0842kW/kg, which is acceptable.