The recovery of fixed-wing UAVs is a difficult problem in the field of aircraft. Except for a few expensive and advanced UAVs (such as hunters and Global Hawks), they can land independently. Other UAVs have different recycling methods. Today, I will introduce you to a recycling method commonly used in small drones.
Legend: "The killer bee" drone launch (left) and recycle (right)
The working principle of the drone collision net recycling system
UAV collision net recycling is an ideal method for precise point recovery. It is especially suitable for fixed-wing UAVs used in narrow recycling sites or ships. It can be considered as a zero-distance recycling method. Collision net recycling can be applied to small and medium-sized ships. The recycling net is usually deployed at the rear of the ship. Its height is higher than the stern and the aircraft directly hits the net. After the drone is successfully captured, the drone is lowered and the drone is manually removed from the net. Collision recovery does not require anchors to accurately maintain the rate of descent as in conventional runway landings, but requires precise control of the landing site to maintain the lowest possible entry speed.
Legend: Schematic diagram of the drone recycling network
Key technology of UAV collision net recycling system
The collision net recovery system consists of a blocking net device, an energy absorbing buffer device and an end guiding device. The core technology lies in how to guide the drone to fly accurately to the blocking net. How to gently absorb the energy after touching the net, so that the device is stable and accurate Realize collision recovery. The research and application of UAV end-guide technology for foreign collision net recovery mainly includes the following types: radar guidance, laser guidance, GPS combination guidance and TV tracking guidance. Among them, the typical application based on laser guidance is the target positioning and tracking sensor automatic guiding system used by the Swiss Air Force; the typical application based on GPS combination guidance is the American Piccolo automatic landing system, which is used for the "silver solitary" drone. Automatic landing collision net recycling.
Legend: Silver Fox UAV collision net recycling system
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