【title】：Precision parafoil recovery - Providing flexibility for battlefield UAV systems?Precision parafoil recovery - Providing flexibility for battlefield UAV systems?
【作者】：Wyllie, Tim^Downs, Peter (DERA, Systems Integration Dept., Farnborough, United Kingdom)
【Corportate Author】：【Catalog】：7501 Aeronautics--General (1975-)|【Keywords】：PARAFOILS; REMOTELY PILOTED VEHICLES; INFLATING; PARACHUTE DESCENT; RECOVERY; CANOPIES; COMPUTERIZED SIMULATION【Publish Year】：
【Language】：English【Record id】：97-1497【File Size】：938K
【Come From】：In: AIAA Aerodynamic Decelerator Systems Technology Conference, 14th, San Francisco, CA, June 3-5, 1997, Collection of Technical Papers (A97-31273 08-03), Reston, VA, American Institute of Aeronautics and Astronautics, 1997, p. 254-260.【AAIA ID】：A9731300
【Abstract】：Autonomous and accurate recovery of small unmanned aerial vehicles (UAVs) in a battlefield scenario continues to present a technical challenge, especially in Europe where the focus tends to be on sub-200 kg UAVs requiring highly mobile support and ground equipment. ^We recently conducted an experimental program on the feasibility of mating a parafoil to a suitable UAV and control system to provide this recovery capability. ^Using the Target Technology Banshee air target and a Tempo 150 parafoil, 30 test flights were made over a period of nine months. ^Initial flights were man-in-the-loop, and showed stability, controllability, good flare characteristics, and low deployment loads. ^Later, closed-loop flights used a simple control approach to calculate the optimal deployment point based on wind and air vehicle data, and then acquired and held the track from this point to a GPS aim-point on the ground, flaring before touchdown. ^Despite the attractiveness of a simple approach, this system lacked the flexibility to cope with certain conditions, and did not fulfil all its early promise. ^(Author)
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