无人机可以在充满威胁的环境中工作,因此它呈现了特有的魅力。美国国防部空中侦察办公室的一族无人机正在或已经跨过先期概念与技术演示阶段。它们在尺寸、隐身性能、续航能力和飞行高度方面采取了不同的组合,并拥有先进 UAVs can work in a threatening environment, so it presents a unique charm. A family of UAVs at the U.S. Defense Department’s Aerial Reconnaissance Office is or has crossed the pre-concept and technical demonstration stages. They have different combinations in terms of size, stealth performance, battery life, and flight altitude, as well as advanced