Abstract: A method for dynamically converting the attitude of a rotary-wing drone that includes a body including an electronic board controlling the piloting of the drone and four link arms forming lift-producing wings, each arm including a rigidly connected propulsion unit. The method includes executing, on reception of an instruction allowing a conversion between flight using the rotary wings and flight using the lift of the wings, the conversion being defined by a pitch angle to be achieved ?ref, of a repeated sequence of steps until the pitch angle ?ref is achieved, including estimating the current pitch angle ?est of the drone, determining an angular trajectory depending on the pitch angle to be achieved ?ref, and sending one or more differentiated commands based upon the angular trajectory and the current estimated pitch angle ?est to one or more propulsion units such that the drone is rotated about the pitch axis.

Abstract: A rotary-wing drone includes a drone body that includes an electronic board controlling the piloting of the drone, and four link arms that include a rigidly connected propulsion unit. The link arms form lift-producing wings.

Abstract: A method for dynamically controlling the attitude of a rotary-wing drone. The method includes dynamically controlling the attitude of the drone when the drone is flying using lift of each of four wings of the drone, by controlling the attitude of the drone by sending differentiated commands to one or more propulsion units of the drone so as to rotate the drone about a roll axis and/or pitch axis and/or heading axis of the drone from a current angular position to a final angular position, the axes being defined in the reference point of the drone.

Abstract: A drone propulsion unit includes a propeller with a hub and a plurality of blades, an electric motor with a motor support, and a motor control device, wherein the electric motor includes a fixed part with a stator connected to the motor support and a mobile part with a rotor mobile about an axis of rotation for driving the propeller, the propeller includes a blade with a plurality of electroluminescent diodes and a diode control device, the motor includes a hollow central shaft, and the motor support includes a communication device adapted to communicate with a communication device integrated in the propeller, with the communication devices being positioned on either side of the hollow shaft.

Abstract: A new method of dynamic control of a rotary-wing drone in throw start includes the steps of: a) initializing a predictive-filter altitude estimator; b) the user throwing the drone in the air with the motors turned off; c) detecting the free fall state; d) upon detecting the free fall state, fast start with turn-on of the motors, open-loop activation of the altitude control means, and closed-loop activation of the attitude control means; e) after a motor response time, stabilizing the drone by closed-loop activation of the altitude control means, and closed-loop activation of the attitude control means; f) detecting a stabilization state such that the total angular speed of the drone is lower than a predetermined threshold; and g) upon detecting the stabilization state, switching to a final state in which the drone is in a stable lift condition and pilotable by the user.

Abstract: The drone comprises a body and a plurality of propulsion units, each provided with a propeller driven by a respective motor, the different motors being able to be controlled in a differentiated manner so as to pilot the drone in attitude and speed and with production of a lifting force. The accessory has a shaft that is removably fastened to the drone body in a transverse orientation with respect to the main direction of progression of the drone, and at a point located in alignment with the center of gravity of the drone and above that center of gravity. The accessory has two ring elements that are mounted freely in rotation, independently of each other, at the ends of the shaft and symmetrically with respect to the drone body. The density of these ring elements with respect to water is lower than the unit, and their diameter is higher than the overall size of the drone.

Abstract: A new method of dynamic control of a rotary-wing drone in throw start includes the steps of: a) initializing a predictive-filter altitude estimator; b) the user throwing the drone in the air with the motors turned off; c) detecting the free fall state; d) upon detecting the free fall state, fast start with turn-on of the motors, open-loop activation of the altitude control means, and closed-loop activation of the attitude control means; e) after a motor response time, stabilizing the drone by closed-loop activation of the altitude control means, and closed-loop activation of the attitude control means; f) detecting a stabilization state such that the total angular speed of the drone is lower than a predetermined threshold; and g) upon detecting the stabilization state, switching to a final state in which the drone is in a stable lift condition and pilotable by the user.

Abstract: The fast fixing system comprises a link part (24) integral with the accessory (22), and a support face (26) formed on the drone body (12). The link part is mobile in rotation (28) with respect to the frame between a free position allowing the placing or the removal of the accessory, and a locked position in which the link part is immobilized in rotation and in translation on the frame, so as to form with the latter an integral unit. Means are provided, which define the locked position by a rotation stop of the link part with respect to the frame, means for axial translation blocking of the link part with respect to the frame when the link part is in the locked position, and means for elastic fastening of the link part to the frame once the locked position reached.

Abstract: The support block (130) of each motor of the drone comprises: a support part (131) onto which are fastened an electric motor (120) for driving a propulsion group (100) of the drone, and at least one component (111) of the propulsion group intended to be coupled to the motor; a stand foot (132) for supporting the drone on the ground; and a connection element (133) extending between the support part and the stand foot. The stand foot and the connection element providing together a clearance space (134) for the electric motor during the placement of the motor in its fastening position on the support part.