DESIGN AND STABILITY ANALYSIS OF QUADROTORS TO BE USED IN PRECISION AGRICULTURE

Abstract

Quadrotors are currently one of the platforms under greater development in the academic world, because of their great mobility but also the potential to develop unmanned aircrafts capable of hovering. This project’s goal was to build a small-scale aircraft from the fusion of the quadrotor and tiltrotor concepts, enabling it to move in all six degrees of freedom with the advantage of maintaining its central core levelled, regardless of its movement and speed, which also allows a reduction in drag by optimizing the surface facing the airflow. This possibility results from adding a tilting movement in two opposed rotors in two directions, other than their rotation. A few alternatives to the tilting rotors concept were explored, and the remaining components of the aircraft were fully explained. Since this is an original aircraft concept, all its motion possibilities were fully determined. An optimum rotor was designed for the aircraft and all the components needed for its construction and implementation were evaluated, selected or designed and constructed. The construction was done in laminated composites. Finally, analysis of servo’s operation, flight performance and aerodynamic drag were conducted. This thesis contributed to the creation of this innovative platform for future works, especially control platforms, in the context of quadrotors with rotor tilting ability.