Uav landing

https://groups.google.com/group/uavdevboard-dev/browse_thread/thread/66dd3db5feeed981 - Clean data from the ultrasound - revise range data to account for bank and roll (fairly easy) (i.e.  determine vertical range to ground). - The system, with no "look ahead", is only really suitable for flat landing fields. - Feedforward control, understanding the characterstics of the plane close to stall, along with drag characterstics, may be vital. - Good landing may require a good understanding of the "transfer  function" of the plane for pitch control, but since we are operating close to the stall, the mathematical model may be invalid.