Autonomous recharging of multirotor unmanned aerial vehicles to extend operational time

An automated navigation system is proposed for Unmanned Aerial Vehicles (UAV) to charge batteries according to their State of Charge (SoC). A compact charging pad suitable for mounting on street light poles was designed for the autonomous charging of the UAV. The UAV can land on the charging pad when the State of Charge reaches predefined threshold values. The landing on the charging pad at predefined GPS coordinate values was found to be satisfactory during actual testing.