自动变桨距螺旋桨电推进系统能效优化方法

为了提升自动变桨距螺旋桨电推进系统的整体效率，引入最优功率控制规律：自动变桨距螺旋桨电推进系统可根据飞行工况和推力需求，同时调节桨距角和螺旋桨转速两个变量，最终获得一组桨距角和螺旋桨转速的组合，使得推进系统在满足推力需求的情况下实现最小的功率消耗，最终达成飞行任务剖面内最小能耗控制的目标。为了验证方法的有效性，针对同一电推进系统，分别采用最优功率控制规律和恒速控制规律完成相同的飞行任务剖面，获得了两种控制规律下的螺旋桨推进效率、电动机效率、电推进系统总效率和电推进系统能耗数据。结果证明：相较于恒速控制规律，最优功率控制规律能够有效的提升电推进系统效率并降低能耗，完成相同飞行任务剖面的能耗降低6.3%左右。

Energy efficiency optimization method of automatic variable pitch propeller electric propulsion system

To improve the overall efficiency of automatic variable pitch propeller electric propulsion system, the optimal power control law was introduced: automatic variable pitch propeller electric propulsion system can adjust both the pitch angle and rotation speed simultaneously according to the flight conditions and thrust demand, and finally obtain a pitch angle/rotation speed combination, so that the propulsion system can meet the thrust demand and achieve the minimum power consumption, ultimately achieving the goal of minimum energy consumption control in the whole flight profile. To verify the effectiveness of the method, the same electric propulsion system was used to complete the same mission profile with the optimal power control law and the constant speed control law, then the propeller propulsion efficiency, motor efficiency, total electric propulsion system efficiency and electric propulsion system energy consumption data under the two control laws were obtained. The results proved that the optimal power control law can effectively improve the electric propulsion system efficiency and reduce the energy consumption compared with the constant speed control law, and the energy consumption of the same mission profile was reduced by about 6.3%.