Abstract: An inertial angular sensor of MEMS type has a support of at least two masses which are mounted movably with respect to the support, at least one electrostatic actuator and at least one electrostatic detector. The masses are suspended in a frame itself connected by suspension means to the support. The actuator and the detector are designed to respectively produce and detect a vibration of the masses, and a method for balancing such a sensor provided with at least one load detector mounted between the frame and the support and with at least one electrostatic spring placed between the frame and one of the masses and slaved so as to ensure dynamic balancing of the sensor as a function of a measurement signal of the load sensor.

Abstract: An AC/DC converter comprising an input rectifier circuit connected in series with a primary winding (5) of an isolating transformer (6) and to a chopper switch (T1) driven by a control circuit (10) using pulse width modulation on the basis of a signal representative of a primary current, the isolating transformer having a first secondary winding (7) that is wound in the same direction as the primary winding and that is connected to an output line (8) of the converter via a diode (D4) and a filter coil (L1), and a second secondary winding (9) that is wound in the opposite direction to the primary winding and that is connected directly to the output line via a diode (D2), the output line being connected to an output capacitor (Cout).

Abstract: The invention relates to a garment for ballistic protection and carrying equipment, including: a carrying harness including a back portion suitable for covering the back of a user, the back portion including a cover for accommodating a back-protecting pack and straps suitable for being placed over the shoulders of the user in order to hang the harness from the shoulders; and two abdominal portions suitable for covering the torso of the user, each abdominal portion being designed to be removably attached onto a respective suspender of the carrying harness, the abdominal portions including a closing device for connecting the abdominal portions together in order to close the vest.

Abstract: An improved method of allocating MAC addresses for an electrical distribution network to make it possible to save a great deal of time during the address allocation phase. The method stores, at the central address allocation device, a list of associations between the serial numbers of the devices and the MAC address allocated. The method also sends a cataloging request serving to allocate the MAC address prior to the sending of a communication frame. In this manner, the discovery phases for allocating the MAC addresses to devices without addresses are appreciably reduced. The time when the network is dedicated to such discovery is reduced, thereby increasing accordingly the useful communication time available in the network.

Abstract: A power supply and control device for a plurality of electric actuators, the device comprising a control circuit and a power circuit, the power circuit having an inverter module connected to a switch module provided with connection means for connection to the actuators, the control circuit being connected to the switch module to operate it so as to connect the actuators sequentially to the inverter module, wherein the control circuit is arranged to control the inverter module and the switch module sequentially, and wherein the control circuit includes a monitoring module arranged to detect a malfunction of the device. An actuator assembly comprising a plurality of actuators and such a power supply and control device, and an aircraft including a plurality of actuators and such a power supply and control device of the above-specified type.

Abstract: An electronic control unit having a microcontroller provided with RAM associated with variable data and ROM associated with the code of a software operating system incorporating a real time core for executing computer tasks. The RAM and ROM include zones corresponding to partitions, one of which is allocated to the real time core, while each of the others is allocated to at least one of the tasks. The RAM and the ROM are associated with an address bus that is physically programmed so that each partition is prevented firstly from writing in another one of the zones of the RAM, and secondly from executing another one of the zones of the ROM. The real time core is associated with a timer for allocating an execution time to each partition.

Abstract: A method for determining protection limits at a future moment associated with navigation states of a bearer by estimating the navigation states of the bearer at the present moment, developing a statistic model of the estimation errors of navigation states of the bearer at the present moment in the form of a covariance matrix, extrapolating, for a future moment, the statistical model of the estimation errors, calculating protection limits at the future moment from the extrapolated statistical model, the extrapolation of the statistical model of the estimation errors implements the application of a constant and positive transition matrix to a standard deviation vector constructed from the square root of the elements of the diagonal of the covariance matrix, to propagate, up to the future moment, the standard deviations developed at the present moment. The invention also relates to a navigation system configured to implement the method.

Abstract: The electrical card has power modules constituted by power components and by control components that are carried by strips fastened on a support plate comprising an electrical ground plate. The power components are connected firstly to control buses, and secondly to power buses carried by the support plate and extending in a layer adjacent to the electrical ground plate.

Abstract: The invention relates to a passive mechanical athermalization device, comprising: a barrel (1) that is made of a first material having a first thermal expansion coefficient (11) and that has a longitudinal axis (AA), said barrel comprising at least one first portion (11) and at least one second portion (12), the device being characterized in that it comprises: at least three beams (7) made of the first material, each of the beams (7) circumferentially connecting the first portion (11) and the second portion (12) relative to the longitudinal axis (AA); at least three bars (8) made of a second material having a second thermal expansion coefficient (12) that is different from the first thermal expansion coefficient, circumferentially distributed around the barrel (1) relative to the longitudinal axis (AA), each bar (8) axially connecting the first portion (11) and the second portion (12) relative to the longitudinal axis (AA) such that the thermal expansion of the barrel (1) results in a deformation of the beams

Abstract: A system and method for traversing a firewall for a voice-over-IP session or other communication session uses four main components: a relay agent, and NAT 30Agent, a SIP proxy and a application server. The SIP proxy is located in the public network and SIP signaling messages are routed through the SIP proxy. The sever opens ports in the firewall for signaling between the SIP proxy and the relay agent behind the firewall. The application server also opens ports in the firewall for media traffic. The NAT 30Agent disposed in the path from the firewall to the Internet filters media packets and changes the public source address of the media packets to a predetermined address associated with the open media port.

Abstract: An actuating assembly for an aircraft engine thrust reverser includes a drive shaft bearing a master pinion; a ball screw bearing a slave pinion engaging with the master pinion; a nut capable of translating over the ball screw as a result of the rotation of the ball screw; an extension tube rigidly secured to the nut and a lock assembly to block the rotation of the drive shaft in a so-called direct jet position of the reverser. The extension tube includes, at its free end, a member for connecting to a portion of the reverser prior to being actuated. In particular, the lock assembly includes an abutment secured to the drive shaft, and a cotter moveable between a locking position and an unlocking position. The reduction ratio (R) between the slave and master pinions is even.

Abstract: The methods for managing access to a communication medium shared by a plurality of radio communication devices. The method of accessing a radio communication medium shared between a plurality of communication terminals. The method is based on a variant of the CSMA/CD access protocol. The method is based on monitoring of the medium and the emission of a token to request permission to emit. The terminals that receive this token then emit an acknowledgement intended to signal that the medium can be used, or a collision message if they receive a plurality of tokens simultaneously. In the latter case, the emitter retries its attempt to use the medium later on.

Abstract: In a gyroscopic system comprising at least four vibratory gyroscopes, a first measurement is provided by said vibratory gyroscope to be calibrated, and a second measurement is provided by a combination of the measurements from the other vibratory gyroscopes of the system. At the level of the vibratory gyroscope to be calibrated, an initial command is applied in order to command a change in position from a first vibration position (?1) to a second vibration position (?2). A calibrated scale factor value of the vibratory gyroscope to be calibrated is then determined on the basis of a calculated value in relation to the change in position, based on the period of time during which the initial command is applied, the initial command, an angular difference between the first and second vibration positions measured according to the first measurement and an angular difference between the first and second vibration positions measured according to the second measurement.

Abstract: The invention relates to a rotolinear actuator that comprises: a central rod having an outer thread and surrounded by a ring with an inner thread, and threaded satellite rollers distributed between the central rod and the outer ring engaged with the threaded faces thereof. The actuator includes means for dispensing by capillarity a liquid lubricant at least one contact area of at least one satellite roller with the central rod and with the outer ring, wherein the lubricant is economically dispensed by capillarity in an amount that is just sufficient and precisely at the contact locations of the interacting members, from a tank that may be sufficient for the lifetime of the actuator.

Abstract: An electric motor device includes a rotor, a stator, and electrical means for driving rotation of the rotor relative to the stator, the device being characterized in that the stator includes a substantially spherical cavity receiving the rotor, which is itself substantially spherical, and in that the electrical means are arranged to drive the rotor in rotation about at least two axes. A control instrument including such a motor device.

Abstract: A method of determining a heading by means of an inertial device (1) providing measurements by means of at least one vibratory gyro (3), the method comprising the steps of: •positioning the inertial device in such a manner that the gyro extends close to a plane that is substantially horizontal; •orienting the inertial device successively in a predetermined number of orientations about a vertical axis, the predetermined number being greater than one; •for each orientation, adjusting the electric angle of the vibratory gyro to a predetermined value, the predetermined value of the electric angle being the same for all of the orientations of the inertial device, and taking a measurement; and •determining the heading from the measurements and an angle between the orientations.

Abstract: The description is of a procedure that allows temporary secure access to a communication network. The network has a number of network connection ports. Certain of these ports are termed confidential, that is, their access is controlled by the network operator, in contrast to the other connection ports access to which is free. The access procedure claims is based on the provision of two distinct services accessible via tunnels that are, advantageously, digital. The first service is accessible only from the confidential connection ports and only allows a connection credit to be obtained. The second service is accessible from all connection ports, only by means of the connection credit issued by the first service.

Abstract: The invention relates according to a first aspect to a hybridization device (1) comprising a virtual platform (2), a bank (3) of Kalman filters each estimating a correction vector (dX0-dXn) comprising a plurality of components, said device formulating a hybrid output (SH) corresponding to inertial measurements (PPVI) calculated by the virtual platform (2) and corrected by a stabilization vector (dC) exhibiting one and the same plurality of components, characterized in that it comprises a correction formulation module (4) configured so as to formulate each of the components (dC[state]) of the stabilization vector (dC) as a function of all the corresponding components (dX0[state]-dXn[state]) of the correction vectors (dX0-dXn).

Abstract: The invention relates according to a first aspect to a device (1) for reconstructing a clock signal from a baseband serial signal (NRZ-D), comprising: —a pulse generating circuit (2) adapted for generating pulses at each transition, rising or falling, of the baseband serial signal (NRZ-D); —a phase-locked loop (5) comprising a voltage-controlled oscillator (6) which generates an oscillator output signal (VCO-S) and a filter (7) delivering a setpoint signal (VCO-E) to the oscillator (6), the phase-locked loop (5) furthermore comprising a breaker (8) interposed between the oscillator (6) and the filter (7), the switching of which is controlled by the output (Cde-S) of the pulse generating circuit (2), and in that the filter (7) is a low-pass filter, such that: —in the presence of a pulse generated by the pulse generating circuit (2), the breaker (8) is closed and the filter (7) then averages the oscillator output signal (VCO-S) passing through the breaker so as to deliver the setpoint signal (VCO-E) to the osci

Abstract: A method of conserving operating data of a vehicle, the method including the steps of collecting the operating data and recording it progressively on board the vehicle, detecting an event, as from a detection, transmitting to at least one external receiver firstly at least some of the data that is being collected and as it is being collected, and secondly at least some of the stored data in a chronological order that is the reverse of the order in which it was recorded, and recording the data received by said external receiver. A conservation system for implementing the method is also provided.