Abstract: A method for assisting with the navigation of a fleet of vehicles including a main vehicle and a secondary vehicle that is mobile in relation to the main vehicle, the method including receiving relative movement data, acquired by one or more sensors, between the main vehicle and the secondary vehicle, estimating a navigation status of the fleet of vehicles by an invariant Kalman filter using the received data as observations, the navigation status including first variables representing a first rigid transformation linking a location mark associated with the main vehicle to a reference point, and second variables representing a second rigid transformation linking a location mark associated with the main vehicle to a location mark associated with the secondary vehicle, the invariant Kalman filter using, as an internal composition law, a law including a term-by term composition of the first rigid transformation and the second rigid transformation.

Abstract: The invention relates to an electric machine comprising a rotor and a stator. The rotor (40, 4) comprises a plurality of permanent magnets (4), the stator comprises a plurality of coils suitable for being powered by an electric current and two Hall effect sensors (6) on supports (60). The sensors are configured to detect a change in gradient of the normal component of a magnetic field generated by the permanent magnets (4). The stator comprises a part (7) comprising —a first zone (7a), —a second zone (7b), and a third zone (7c) extending from the first zone (7a) up to the second zone (7b). The maximum radial thickness of the third zone (7c) is less than the minimum radial thickness of the first zone and the second zone.

Abstract: A system for firing a projectile mounted on a carrier, the decision assistance system comprising: a first simulator for simulating a navigation system of the carrier and configured to produce a precision of a solution for navigation of the carrier; a second simulator for simulating a navigation system of the projectile and configured to be initialized with the precision of the solution for navigation of the carrier and produce a precision of a solution for navigation of the projectile; and a selector configured to select or not the projectile as projectile to be fired as a function of the precision of a solution for navigation of the projectile.

Abstract: A method and a device for monitoring a region (R) in which a carrier (100) is located, which device comprises a display unit displaying a polar plot (10) having a center symbolizing the current position of the carrier (100) and in which there is placed a first moving-body symbol (1, 2, 3) representing the current position of the moving body (101, 102, 103); the polar plot (10) being surrounded by an annular band (20) of width (l) representing a predetermined monitoring duration and containing second moving-body symbols (1?, 2?, 3?) representative of successive angle readings of the path of said moving body (101, 102, 103).

Abstract: An accelerometer sensor includes a casing, a pendulum fixed to the casing, a movable electrode carried by the pendulum and connected to a detection circuit, a first electrode and a second electrode rigidly attached to the casing to form, with the moving electrode, two capacitors of variable capacitance depending on a distance between the electrodes. The accelerometer sensor further includes a control unit that carries out detection operations to measure the variable capacitances of the capacitors. The control unit also performs a control operation of the movable electrode depending on the capacitances measured by applying a logic signal for controlling a switch for selective connection of the fixed electrodes to an excitation circuit delivering a control signal to the fixed electrodes in order to keep the pendulum in a predetermined position.

Abstract: A method for controlling an engine, a device for controlling an engine and an aircraft, the method comprising the steps of determining a first intensity Kp, representing a stiffness, according to a physical stiffness Kss of the mechanical connection and a stiffness setpoint Kpspec to be rendered on the control column, a second intensity Kv, representing a damping, according to a physical damping fss between the control column and the engine and a damping setpoint Kvspec to be rendered on the control column, and a third intensity Ka, representing an inertia, according to a physical inertia Jss of the control column and an inertia setpoint Kaspec to be rendered on the control column.

Abstract: Process for protecting a part comprising an aluminum-based alloy having a copper content greater than or equal to 0.5% by mass, the process comprising depositing a non-conductive protective layer over the entire part, laser pickling by means of a laser beam of an area of the non-conductive protective layer so as to form an unprotected area, chemical conversion, with trivalent chromium, of the unprotected area so as to form a conductive protective layer, and drying of the part.

Abstract: Process for protecting a part comprising an aluminum-based alloy, the process comprising depositing a primer paint layer by anaphoresis over the entire part, polymerizing the primer paint layer in order to form a non-conductive polymerized primer paint layer, laser pickling, by means of a laser beam, an area of the non-conductive polymerized primer paint layer in order to form an unpainted area, trivalent chromium chemical conversion of the unpainted area in order to form a conductive protective layer and drying the part, depositing a finishing paint layer on at least a portion of the non-conductive polymerized primer paint layer, and polymerizing the finishing paint layer.

Abstract: The invention relates to a force application device for a control stick of an aircraft, said control stick comprising a control lever that is connected to at least one motor comprising a drive shaft that can be rotated about an axis, the force application device comprising: a first pin connected to the shaft, a housing, an electromagnet, a movable actuator comprising a magnetic material, a coupling device comprising an input gear connected to the housing and an output gear comprising a second pin, and means for clamping the first pin and the second pin which comprise a first tooth and a second tooth, said device having an operating configuration in which the electromagnet is active and the output gear is positioned at a distance from the input gear, and a blocking configuration in which the electromagnet is inactive and the gears are meshed.

Abstract: An antenna in a system is provided and includes a first device and at least one second mobile device, where the first device communicates with the second device(s). In an acquisition mode, for each antenna of an antenna system, a first item of communication quality information is obtained, and the antenna the first item of information of which is the highest is selected. In a pursuit mode, if the selected antenna is sectoral, a second item of communication quality information is obtained, and the antenna the second item of information of which is the highest is selected. For each antenna, a third item of communication quality is obtained if the selected antenna is the omnidirectional antenna, and from the third items of information, the antenna the third item of information of which is the highest is selected.

Abstract: A method for measuring the hardware and operational state of a dual-circuit solenoid valve including first and second coaxial coils each associated with a circuit is disclosed. The method includes the steps of injecting a sinusoidal current into the first coil; measuring the voltage induced across the terminals of the second coil; and plotting at least one curve of a first magnitude proportional to the measured induced voltage as a function of a second magnitude proportional to the injected sinusoidal current.

Abstract: A path is defined to be followed by a vehicle in an environment represented by a graph of nodes connected by edges. Each node represents the vehicle's position. Each edge between two nodes indicates a transition cost between the two nodes. An instance of the graph, which is represented by a start node, a destination node and mandatory nodes through which the vehicle must pass, is obtained. An initial order of travel through the mandatory nodes is obtained by applying a procedure, using a graph convolutional neural network, adapted to the graph, to the instance. A procedure of local optimisation of the mandatory nodes is executed in order to obtain an optimised order. A path for the instance is defined to be resolved: from the optimised order and for each pair of nodes of the instance to be resolved, from a shortest path between the nodes of the pair.

Abstract: A central communication unit (13), comprising: transmitter means arranged to transmit a single global downlink frame (17) addressed to all of the subscriber communication units, the global downlink frame comprising a plurality of data packets, each addressed to a respective one of the subscriber communication units, the global downlink frame supplying a common reference time so that, after receiving the global downlink frame (17), each subscriber communication unit can start transmitting an uplink frame (18) at the end of a waiting interval starting at the common reference time and having a duration equal to a respective waiting duration that is associated with said subscriber communication unit; and receiver means arranged to receive in succession the uplink frames (18) transmitted by each of the subscriber communication units.

Abstract: A configuration system (80) arranged to configure an aircraft in a single-pilot mode and a two-pilot mode, comprising: acquisition means (84) and authentication means (83) arranged to acquire and authenticate a configuration order that defines the selected mode and controls the configuration system (80) to configure the aircraft in the selected mode; first activation means (85) arranged to activate equipment dedicated to piloting by a single-pilot on board when the aircraft is configured in single-pilot mode, and to deactivate dedicated equipment when the aircraft is configured in two-pilot mode; verification means (87) arranged to, when the aircraft is configured in the single-pilot mode, verify that single-pilot flight conditions are met and inform the sole pilot on board and a ground station of the results of these checks.

Abstract: In the field of multi-rotor rotary-wing aircraft a propulsion system for such an aircraft includes a reconfigurable electric network for supplying the electric motors driving the rotors. The system includes: a supply source, a supply bus connected to the supply source, at least four drive units each including an electric motor and its control circuit, and an electrical ring network including: an electrical line which is interrupted at each drive unit and whose ends are connected to the supply bus, and, for each drive unit, a first switch and a second switch that are connected between the control circuit and the electrical line, on either side of the interruption.

Abstract: A method electrically insulates an electronic device including a housing having a first face provided with a first opening closed by a PCB and a second face provided with a second opening extending facing at least a portion of at least one connection interface in which at least one first connector is connected. The method includes the steps of forming a mold around the connection interface, and while the device is placed in a vacuum enclosure, pouring a liquid resin into the mold in order to form a layer of electrically insulating material between the connector and the connection interface. A device is obtained by performing the method.

Abstract: A method of controlling an electrical actuator of a mechanical system having a plurality of nested zones of contact, the method comprising the steps of: acquiring data about the mechanical system, which system includes a number of nested zones of contact; preparing a model of the system on the basis of said data and of a number of LuGre models put in parallel equal to the number of nested zones of contact, and determining parameters of the model and also a compensation structure for compensating friction in the nested zones of contact; including the compensation structure in a control relationship for the actuator A; and controlling the actuator by means of the control relationship.

Abstract: A modular exoskeleton structure provides force assistance to a user. The structure includes a base module including a lumbar belt capable of surrounding the waist of the user, a battery and a control unit attached to the lumber belt, a first attachment part attached to the belt and capable of cooperating with a second complementary attachment part of a hip module to attach the hip module to the base module by snapping the second attachment part into the first attachment part, and a third attachment part attached to the belt and capable of cooperating with a complementary fourth attachment part of a back module for attaching the back module to the base module.

Abstract: An electronic circuit board includes a printed circuit board and first and second electronic components. The printed circuit board includes a first insulating layer, a second insulating layer attached to the first insulating layer and in which is formed an open cavity, and a second conductive layer attached to the second insulating layer. The second conductive layer is treated to form a surface solder pad. The first electronic component is housed in the open cavity of the second insulating layer. The second electronic component is placed on the second insulating layer without overlapping with the open cavity. The first electronic component and the second electronic component each include a termination soldered on the surface solder pad, the surface solder pad being shared by the first and second electronic components.

Abstract: An optically transparent electromagnetic shielding assembly exhibiting a shielding efficiency that is increased when a conducting or polarizable fluid produces a low electrical impedance value between a periphery and a central region of a window. Such shielding assembly is useful in detection systems that are exposed to varying intensities of electromagnetic radiation, such as microwave radiation.