Unmanned aircraft, unmanned aircraft control system, and flight control method

An unmanned aircraft control system comprising:

• an unmanned aircraft;
• a directivity projector that outputs light;
• and
• a controller,
• wherein the unmanned aircraft includes
• an image device that captures a projection object onto which light output from the directivity projector is projected, and
• the controller includes:
• a position calculator that calculates a relative distance between a position of the unmanned aircraft and an indicate d light spot projected on the projection object by the directivity projector, using an image captured by the image device, and calculating a position of the indicated light spot based on the calculated relative distance;
• and
• a flight controller that controls a flight of the unmanned aircraft based on a flight path generated according to the calculated position of the indicated light spot.

A flight control method comprising:

• capturing a projection object onto which light output from a directivity projector for outputting light is projected;
• calculating a relative distance between an unmanned aircraft and an indicated light spot projected on the projection object by the directivity projector, using a captured image;
• calculating a position of the indicated light spot based on the calculated relative distance;
• and
• controlling a flight of the unmanned aircraft based on a flight path generated according to the calculated position of the indicated light spot.