Unmanned aircraft, abbreviated as "UAV", are unmanned aircraft that are operated by radio-controlled equipment and self-contained programmed controls, or are operated autonomously, either fully or intermittently, by on-board computers. UAV can be categorized into military and civilian according to their field of application. On the military side, UAVs are categorized into reconnaissance aircraft and target aircraft. On the civil side, UAV+industry application is the real need of UAV. Applications in aerial photography, agriculture, express transportation, disaster rescue, mapping, manufacturing romance, and so on, have greatly expanded the use of drones themselves ......