Unmanned air vehicle (UAV) is one of the focuses of the development in military technique, because it can hover a long time in the very high or low altitude and meet the requirements of modern warfare to reduce or avoid casualties.

• 无人机可以在超低空和超高空长时间盘旋，与有人驾驶飞机相比，其活动空间和范围更为广阔，并且适应现代战争对减少乃至避免人员伤亡的要求，近年来成为各军事强国发展的军事技术热点之一。