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激光输能无人机(UAV)由于飞行高度高和续航时间长等优势得到关注。从激光输能角度,基于无人机质量评估模型,建立了激光辐照功率密度和无人机输出功率以及飞行性能之间的函数关系。以Sky Sailor太阳能无人机为例,计算分析了激光输能无人机和太阳能无人机的升限和飞行包络。结果表明由于激光辐照功率密度大和光/电之间能量转化效率高,与太阳能无人机比较,可携带的有效载荷更大、升限更高、爬升和抗扰能力更强;随着激光辐照功率密度增大,即使电子设备和有效载荷的质量和功耗都增大,飞行包络很宽,同时,飞行速度增大,但实际升限有所降低。
Laser-powered UAVs are gaining attention due to their high flying height and long battery life. From the perspective of laser energy transmission, based on the model of UAV quality assessment, the functional relationship between laser power density and UAV output power and flight performance was established. Taking Sky Sailor solar unmanned aerial vehicle as an example, the ceiling and flight envelop of laser energy-delivering UAV and solar UAV are calculated and analyzed. The results show that due to the high power density of laser irradiation and the high energy conversion efficiency between light and electricity, the payload can be carried more, the lift higher and the climbing and anti-disturbance ability stronger than the solar UAV. Increasing the irradiance power density increases the mass and power consumption of electronic equipment and payloads, wide the envelope of flight, and increases the flight speed, but the actual ceiling is reduced.