Optical flow-based controller for reactive and relative navigation dedicated to a four rotor rotorcraft

Eduardo Rondon (1) , Isabelle Fantoni-Coichot (1) , Anand Sanchez (1) , Guillaume Sanahuja (1)

1 Heudiasyc - Heuristique et Diagnostic des Systèmes Complexes [Compiègne]

Autonomous navigation of an unmanned aerial vehicle (UAV) can be achieved with a reactive system which allows the robot to overcome all the unexpected changes in its environment. In this article, we propose a new approach to avoid frontal obstacles using known properties of the optical flow and by taking advantage of the capability of stationary flight of the rotorcraft. A state machine is proposed as a solution to equip the UAV with all reactions necessary for indoor navigation. We show how smooth transitions can be achieved by decreasing the speed of the vehicle proportional to the distance to an obstacle and by brief instants of hovering flight. Each stage of our algorithm has been tested in a mobile robot.

Mots clés: Optical-flow; UAV; Rotorcraft; Navigation; Obstacle detection and avoidance

Domaines: Automatique / Robotique

Eduardo Rondon, Isabelle Fantoni-Coichot, Anand Sanchez, Guillaume Sanahuja. Optical flow-based controller for reactive and relative navigation dedicated to a four rotor rotorcraft. IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2009, Oct 2009, Saint Louis, United States. pp.684-689. ⟨hal-00445997⟩