Abstract: A method for correcting drift in a navigation device for a vehicle using a star tracking geolocation means, the method including: a step of preselecting observable stars to be used; then a step of measurements including the navigation device determining the geographical coordinates of the tracker and then, for each of the selected stars, checking the accessibility of the star and measuring the horizontal coordinates; then a processing step including, for all of the stars for which measured horizontal coordinates have been recorded, calculating the geographical coordinates of the star tracker, and estimating the error between the calculated geographical coordinates and the geographical coordinates determined by the navigation device during the tracking of the star; then a step of estimating the drift error in the navigation device; and a step of correcting the drift in the navigation device.

Abstract: A navigation method includes continuously computing an inertial location and, at successive current times, obtaining a satellite location in order to compute a hybridised location by hybridising the inertial location and the satellite location. The method further includes: computing an instantaneous deviation at a given time and then a deviation that has been sustained from the computation time of said instantaneous deviation up to the current time in order to have, for a given period of time, a plurality of sustained deviations from different computation times up to the same current time; computing, for each sustained deviation, at least one detection indicator; comparing said detection indicator with a threshold in order to detect a deficiency of the hybridised location at the current time.

Abstract: A movement transmission device having a first assembly including a housing extending along a first axis, a second assembly configured to move in rotation and in translation along the first axis inside the housing, and a first elastic member. The first assembly includes a first axial stop and the second assembly includes a complementary first axial stop, a first axial clearance being formed between the first axial stop and the complementary first axial stop. The first elastic member is adapted to be deformed during translational movement of the second assembly along the first axis when an axial force greater than a first threshold is applied, the complementary first axial stop being axially supported by the first axial stop.

Abstract: The invention relates to a human-machine interface, in particular for a vehicle or for a device, comprising at least one gripping element equipped with at least one signal-generating means, and a controller and a base for fastening and mobilizing the gripping element and allowing the passage of data connections, the gripping element incorporating at least two data concentrators each connected, at input, in parallel to at least one signal-generating means and connected, at output, to the controller via the base by way of at least one data bus.

Abstract: A navigation method and device, where the method includes the steps of: determining, by a first navigation module, first navigation data of the vehicle based on data from an inertial measurement unit and from a satellite positioning module; and determining, by a second navigation module, second navigation data of the vehicle based on: data from the inertial measurement unit, and from images captured by the vehicle; and moreover based on data from the satellite positioning module and/or from an altimeter.

Abstract: A magnetic hysteresis brake (10), comprising at least a first member (11.1) carrying first magnets (17.1) and a second member (12) made of magnetic material, each first magnet having a first surface (15.1) facing a first surface (14) of the second member (12) in order to generate a first magnetic flux towards the second member (12) through said surfaces, characterised in that the first magnets (17.1) are separated from one another by magnetic elements (18.1) which are made of a magnetic flux-conducting material and which have a first surface facing the first surface (14) of the second member (12) and close to the first surface (15.1) of the adjacent first magnets (17.1) in order to let pass a second magnetic flux the direction of which is opposite to the first flux of the first adjacent magnets, the first surface of the magnetic elements being of smaller size than the first surface (15.1) of the first magnets. The invention also relates to a control instrument and to a vehicle comprising such a brake.

Abstract: The electrical insulating element for a stator comprising a stack of magnetic sheets having at least one first stator tooth and comprising at least one first stator coil wound around the first stator tooth, the first stator tooth having a first end face located at one end of the stack of magnetic sheets, the insulating element comprises an electrically insulating foil having a face coated with adhesive.

Abstract: A bidirectional data communication method for a bidirectional data communication system, in particular an embedded bidirectional data communication system, including one or more first communicating devices that implement a single-pair Ethernet protocol and one second communicating device that implements a single-pair Ethernet protocol and includes a second packet management module connected to a first physical link management module and to a second physical link management module.

Abstract: A method and device for identifying a faulty satellite among a set of satellites S1, . . . , SN from pseudo-ranges between a mobile and the satellites S1, . . . , SN. Particularly, the method includes, following detection of a satellite failure, steps of: for each satellite Si of the set of satellites S1, . . . , SN: obtaining a set Pi of positions of the mobile, each position pi,j being determined from the pseudo-ranges associated with the satellites S1, . . . , SN by excluding: the satellite Si; and at least one other different satellite Sj for each position pi,j; determining a dispersion indicator al for the positions of the set Pi; and identifying the faulty satellite among the set of satellites S1, . . . SN as a function of the dispersion indicators ?1, . . . , ?N.

Abstract: An aerial vehicle having a fuselage having a front portion provided with an optronic sensor and a cover for protecting the sensor, the cover being removably mounted and held on the fuselage by at least one retaining member arranged to retain the cover against aerodynamic forces exerted on the cover during flight. The aerial vehicle includes a member for deactivating the retaining member and an electronic control circuit arranged to control the deactivation member in flight to allow the cover to be ejected.

Abstract: A transmission device for transmitting a movement includes a screw extending along an axis, a nut, a housing, a first elastic member, a second elastic member, —a first assembly, a second assembly, a first axial stop, and a second axial stop. The first elastic member is able to be deformed independently of the second elastic member under the effect of a first axial force, and the second elastic member is able to be deformed independently of the first elastic member under the effect of a second axial force which exceeds a second threshold.

Abstract: The system for controlling the speed of movement of a sliding door for an aircraft comprises a means for electromagnetically braking the door including a transmission shaft and electromagnetic resistive means. The resistive means are autonomous and include a control law relating a first damping value to a first speed threshold of the speed of movement of the door, a second damping value to a second speed threshold of the speed of movement of the door, the resistive means applying on the transmission shaft the resistive torque equal to a first torque proportional to the first damping value when the speed of movement is higher than the first speed threshold, and applying the resistive torque equal to the sum of the first torque and of a second torque proportional to the second damping value when the speed of movement is higher than the second speed threshold.

Abstract: A power supply architecture for powering aircraft actuators includes a single-phase on-board electricity network is connected by a power supply circuit to an electric motor of an actuator, supercapacitor associated with an electronic circuit for managing the operation of the supercapacitor, and a downstream converter device for connecting to the motor. The power supply circuit includes in succession an upstream converter device for converting the voltage of the on-board electricity network into a voltage adapted to the power supply circuit downstream therefrom. The downstream converter device is reversible, so as to convert voltage both when the motor is operating in motor mode and also when the motor is operating in generator mode. The downstream converter device is arranged selectively to have a voltage-decreasing function and to have a voltage-increasing function regardless of the mode of operation of the motor.

Abstract: A method for limiting baro-inertial vertical speed correction, baro-inertial vertical speed being calculated by a baro-inertial loop implemented by a processor included in an airborne system further including an accelerometer and a barometric altimeter, the loop taking a vertical acceleration and a barometric altitude as input and being configured so as: to provide at least one altitude and the vertical speed; to correct the altitude and the vertical speed on the basis of the barometric altitude, a position correction gain, a vertical speed correction gain and a vertical acceleration correction gain. The method includes limiting vertical speed correction when the absolute value of the difference between the barometric altitude and the altitude exceeds a predetermined threshold, the limiting vertical speed correction including modification of the position correction gain.

Abstract: An optronic sight for a motorized vehicle such as an aerial or marine vehicle propelled by a propeller, or a tracked land vehicle. The optronic sight can include an aiming module, means for moving the aiming module about the first and second axes, and means for continuously measuring angular data. The optronic sight can further include a feedback control loop having means for continuously measuring the acceleration of the aiming module in three orthogonal directions of the space, means for detecting at least one fundamental frequency of the vibratory disturbances, and an adaptive corrector configured to continuously receive as input said fundamental frequency, a discrepancy between an angular setpoint value and said angular data, output a movement setpoint value to the moving means.

Abstract: The present disclosure relates to a cooling device comprising a main part, a Stirling cooler arranged inside the main part, and a duct suitable for conducting a heat transfer fluid of the Stirling cooler, the cooling device being characterized in that the duct extends at least partly outside the main part.

Abstract: Method and system for securing data of upload streams to an onboard electronic control unit receiving data coming from a plurality of external terminals, implementing the following successive steps: obfuscating data, transmitted by an external terminal of the plurality of external terminals to a processing device via the onboard electronic control unit, such as to render them, at least in part, uninterpretable by the onboard electronic control unit; processing the data, by the processing device, including removing the obfuscating of the previously-obfuscated data and verifying the integrity of the data; transmitting the verified data to the onboard electronic control unit.

Abstract: A navigation method using a plurality of pseudo-measurements obtained from satellite signals, the method implementing a Kalman filter bank having a main filter calculating a main navigation solution from the pseudo-measurements originating from satellites, and sub-filters each calculating a secondary navigation solution, and at least one innovation of the pseudo-measurements for each non-excluded satellite and a cross-innovation. An indicator is determined from the sensitivity of the cross-innovation to the innovations of the non-excluded pseudo-measurements. A corresponding navigation system and to a vehicle equipped with same are also provided.

Abstract: A system including a coupling device and a data processing device designed to supply an excitation signal (SE) so that an internal signal (?) occurs in the coupling device, this internal signal (?) having a deformation resulting from the current to be measured (I0), obtain a measured signal (Sm) for a variable (Vm) sensitive to the deformation, supply a compensation signal (Sc) in order to cancel out the deformation, and evaluate the current to be measured (I0) based on the compensation signal (Sc). The data processing device is furthermore designed to analyse the measured signal (Sm) and to detect a fault on the trans-mission line based on this analysis.

Abstract: A navigation method based on satellite positioning data and non-satellite positioning data includes the following steps of: computing a first reference navigation that is hybridised on the basis of non-satellite positioning data and satellite positioning data, the first reference navigation being reset on the satellite positioning data; performing a statistical analysis of the positional corrections provided by the first reference navigation and deducing therefrom the existence or the absence of a deception operation of the satellite signal receiver. A navigation system for implementing this method is disclosed.