Abstract:
An aircraft hover system for enabling an aircraft to hover at a target spatial location represented by GPS location coordinates. The hover system includes a display screen rendering a display including live video feed of the terrain below the airborne aircraft, a first mark overlaying the video feed, the first mark representing the current position of the aircraft relative to the terrain, and a perimeter surrounding the first mark, the portion of the terrain within the perimeter being substantially magnified compared to that of the terrain outside of the perimeter. The hover system is configured such that, as the aircraft approaches the target spatial location, the distance between the first mark and a second mark on the display gradually decreases until and finally the first and second marks coincide; the second mark representing the target spatial location.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of controlling a drone in order to flip through a complete turn around its roll axis or pitch axis.SOLUTION: The control method comprises the steps of: (a) controlling respective motors of the drone simultaneously to impart a prior upward vertical thrust impulse to the drone; (b) applying different and non-servo-controlled commands to the respective motors to produce rotation of the drone around the axis of rotation of the flip, from an initial angular position to a predetermined intermediate angular position; and then (c) applying individual servo control to the respective motors to a reference target trajectory, to finish off the rotation of the drone through one complete turn around the axis of rotation, progressively from the intermediate angular position with a non-zero angular velocity to a final angular position with a zero angular velocity.