固定翼无人机动力系统匹配设计研究

Research on Matching Design of Fixed-Wing UAV Power System

为了设计匹配高空长航时无人机动力系统,首先,对某型固定翼无人机进行飞行任务剖面设计,给出任务需求表,对不同飞行任务对应状态下的动力需求进行分析;然后,以动力需求最大的飞行任务为目标,进行螺旋桨及发动机的选型;最后,对螺旋桨与发动机、无人机进行了匹配分析。结果表明,所选无人机动力系统可以满足不同飞行任务下的动力需求。基于无人机结构参数及运动学参数的发动机与螺旋桨选型方法和基于推力平衡与功率平衡的无人机动力系统匹配设计方法可以有效指导无人机动力系统的选型以及无人机、发动机和螺旋桨三者之间的动力匹配。研究结果为固定翼无人机按照需求匹配动力系统完成其飞行任务提供方法。

In order to design the matching high-altitude long endurance UAV power system,firstly,a certain type of fixed-wing UAV is designed with mission profiles,and a mission demand table is given to analyze the power demand under the corresponding states of different missions.Then,the mission with the largest power demand is taken as the target,and the selection of propellers and engines is carried out.Finally,the propellers are analyzed with the matching of the engines and the UAV.The results show that the selected UAV power system can meet the power demand under different flight missions.The engine and propeller selection method based on the structural and kinematic parameters of the UAV and the UAV power system matching design method based on the thrust balance and power balance can effectively guide the selection of the UAV power system as well as the matching of the power between the UAV,the engine and the propeller.The results of the study provide a method for fixed-wing UAVs to match the power system according to the requirements to fulfill their flight missions.