Abstract: To produce a memory which resists ion or photon attack, a memory structure is chosen whose memory point behaves asymmetrically with regard to these attacks. It is shown that in this case, it is sufficient to have a reference cell for an identical and periodic storage structure in order to be able to correct all the memory cells assailed by an attack. An error correction efficiency of ½ is thus obtained, with a simple redundancy, whereas the conventional methods make provision, for the same result, to triple the storage, to obtain a less beneficial efficiency of ?.

Abstract: A metallization ply (1) for the metallization of a thermoplastic composite material part (3), includes in the body thereof at least one substantially continuous metal layer (10) and at least one binding layer (11) secured to the metal layer and realized with a thermoplastic resin. A manufacturing method for a metallized thermoplastic composite material part (3) includes i) a step in which a structural ply or plies (20) are deposited forming a structural layer (2) of the part, ii) a step in which the metallization ply (1) is deposited on an outer face (2a) of the structural layer (2) with the binding layer (11) on the side of the outer face (2a) of the structural layer (2), and iii) a step in which the metallization ply (1) is consolidated with the structural layer (2). A metallized thermoplastic composite material part (3) is also described.

Abstract: The invention relates to a double shouldered welding device for the friction stir welding of parts, in which at least one shoulder has two concentric rings providing two plane concentric bearing surfaces, the rings being arranged so that the smaller-diameter ring is capable of compressing the stirred material of the parts to be welded during advance of the welding device and so that the larger-diameter ring is capable of forming a sink-in stop for the smaller-diameter ring. The invention also relates to a method of friction stir welding by means of the welding device according to the invention, in which said device is force-driven.

Abstract: To solve a leakage problem in a box, it is proposed to provide the box with an electronic circuit for measurement of its specific humidity. It is shown that by comparing this current specific humidity to an initial specific humidity and by evaluating the difference found in relation thereto, one has a reliable tool for measuring the permanence of tightness.

Abstract: A device for monitoring the structure of a vehicle, including an electric measurement sensor, a processing circuit connected to the sensor for converting the sensor measurements into monitoring data, and a transmitter for transmitting the monitoring data to a collecting member, wherein the processing circuit is miniaturised and has a small size so as to be contained within a cube measuring 40×40×40 mm or less, is connected to the sensor by a short wired electrical connection, the length of which measures less than 200 mm, includes an onboard battery, and includes a radio means for transmitting the monitoring data to a mobile collecting member temporarily located in the vicinity thereof.

Abstract: A method for assembling at least two rigid thermoplastic material based parts. The two parts are superposed to have at least one interface zone, wherein at least one of the two parts includes one or plural energy directors, protruding, situated in the interface zone. At least one excited ultrasonic source is brought into contact with one of the two parts, the ultrasonic source applying a compression effort to the two parts in a region of the interface zone located opposite the ultrasonic source. The ultrasonic source is continuously displaced at the interface zone to form a continuous welded joint by fusion of the thermoplastic material in the region positioned opposite the ultrasonic source. Such a method may find particular application for assembly of stratified parts.

Abstract: According to the invention, to determine an operating forecast for a system, measurements are taken of an environmental value in an environment surrounding the system. Then these measurements are processed in a processing unit in order to determine how much of the system's lifetime has been consumed. The consumed lifetime is based on a history of the system in the environment. This is used to calculate a forecast of a good operating lifetime. According to the invention, this forecast determination is made by adaptive linear regression. Thus, all forecast calculations are simplified and can be performed by the system itself and in real-time.

Abstract: To produce a complex structure made of a composite, with assembled individual parts, a method includes the steps of: producing individual parts; producing assembly components, to ensure structural bonds between the individual parts, from fibers impregnated with a resin capable of curing by polymerization, comprising fins attached to a core that determine grooves, in order to receive edges, of the individual parts, subjected to a partial thermal cure to partially polymerize the resin and give the components a dimensional stability and thermoplastic properties; positioning of the individual parts and assembly components; raising the temperature to a thermoplastic forming temperature and applying pressure P in order to apply the fins to faces of the individual parts; and carrying out a complete thermal cure for polymerization of the resin of the assembly components.

Abstract: The behavior of a component subjected to pulsed laser radiation is measured. The polarization value, frequency, and temperature (or other operating conditions) to which the component is sensitive are determined by detecting a temporary or permanent fault in the operation of the component. If necessary, the parasitic currents generated are prevented from destroying the tested component at the time of testing. A susceptibility of the component to energetic interactions and the preferred operating conditions for the component are deduced.

Abstract: The invention relates to a double shouldered welding device for the friction stir welding of parts, in which at least one shoulder has two concentric rings providing two plane concentric bearing surfaces, the rings being arranged so that the smaller-diameter ring is capable of compressing the stirred material of the parts to be welded during advance of the welding device and so that the larger-diameter ring is capable of forming a sink-in stop for the smaller-diameter ring. The invention also relates to a method of friction stir welding by means of the welding device according to the invention, in which said device is force-driven.

Abstract: To test a software application, a method submits an electronic board including a component implementing an application to a laser radiation generated in test equipment. The component is excited with laser pulses having very short durations distributed during complex operational phases of the component for running the application, and the reaction of the component and the application are observed.

Abstract: A connecting rod is composed of two or more assembled shells made of a composite, open over the entire length of the connecting rod. The shells incorporate clevis joints for introducing stress at each of their ends. The shells are produced separately then assembled together to form a sealed section. Each shell is made from a material preimpregnated with long fibres. The production of each shell is simplified due to the overall shape of the shell as a simple curve, thus a shell may be produced industrially, for example, by thermoforming a flat composite preform. The two shells are assembled by simultaneous polymerization of the shells, by bonding, by welding, by riveting or any other assembly process or combination of assembly processes that are compatible with one another. The structural composite connecting rod obtained has very good mechanical properties, especially in compression, with a simple and economic production process.

Abstract: An aircraft includes a cabin in which at least part of the space is demarcated by trim panels and the cabin is provided with a system for the active control of ambient noise. Each trim panel is either an active panel including actuators powered by the active noise control system or a passive panel without such actuators. In addition, the trim panels of the cabin of the one type, either active or passive, are mechanically interchangeable with a panel of the other type, either passive or active, respectively. Power supply wiring for active panels is installed in the aircraft, this wiring being capable of powering all active panels which could be installed, whether said active panels are actually installed or whether interchangeable passive panels are installed. Finally, a power supply system for the active panels is installed in the aircraft and connected to the power supply wiring of the active panels.

Abstract: The invention relates to a device for inserting and crimping a ring on an attachment rod in a hole, comprising a robot, a monitoring and control system and an end tool designed to crimp the ring on the rod. The end tool includes a crimping device and a ring installation device which are solidly connected to a fine-positioning device, by means of which the end tool is attached to an end element of the robot. A ring insertion subassembly of the ring installation device and a crimping nose of the crimping device can move on the end tool so as to be positioned alternatively on an axis of an attachment to be installed, with no controlled movement of the robot when the end tool has been pre-positioned.

Abstract: To manufacture a piece made of composite material with thermosetting matrix, at least one element of the piece is manufactured separately based on strips of fibers preimpregnated with thermosetting resin, which element is subject to a partial thermal curing, having the effect of partially polymerizing the resin of the first element, on the one hand, up to a stage in which the first element has acquired both a sufficient chemical stability to guarantee its storage at ambient temperature and a sufficient dimensional stability to ensure its handling and to guarantee its integrity during later manufacturing operations of the piece and, on the other hand, limited to a stage in which the material forming first element has thermoplastic properties making possible a plastic forming of the first element by raising its temperature at least locally.

Abstract: The invention concerns an electrochromic cell with emission controlled by electrodeposition under the action of a control voltage. The cell comprises the following flexible elements, superimposed and respectively in intimate contact: a first electrode (11) intended to be connected to a first potential of the control voltage, a first porous layer (12), formed of a mixture of PVDF-HFP, PEO and an activated carbon powder, a porous separator (13), formed of a mixture of PVDF-HFP and PEO, a second electrode (14) formed of a grid and connected to a second potential of the control voltage, a second porous layer (15), formed of a mixture of PVDF-HFP, PEO and carbon powder, an aqueous electrolytic solution containing a copper salt being contained in the first flexible layer (12), in the separator (13) and in the second flexible layer (15).

Abstract: According to the invention, one or more thermoplastic sheets (NdT: “feuilles thermoplastique” in the original) (2) are applied on a flat or curved tool (13), and strips (NdT: “des bande” in the original) of a polymer are applied and pressed onto the sheets (2). They are maintained by suction pumps (8), the orifices (4) of which open into a closed volume or one substantially delimited by a sealing joint (3) and occupied by a draining fabric (7). The heating treatment concomitant to the deposition to harden or consolidate the prepreg softens the sheets (2), distorts them to the curvature of the tool (13) and incorporates them in the structure of the prepreg. Application to methods of draping parts with composite material.

Abstract: A monitoring device of environmental parameter values of an environment surrounding a system. The device includes a sensor to these parameters, and includes a means of transmission, in real time, of each measurement to a processing unit. The processing unit is installed in the system and includes the means of filtering the transmitted measurements. This processing unit comprises the means for determining cycles from the measurements thus simplified as well as the means for calculation, in real time, of a length of consumed life of the system, from the thus determined cycles.

Abstract: A method for assembling at least two rigid thermoplastic material based parts. The two parts are superposed to have at least one interface zone, wherein at least one of the two parts includes one or plural energy directors, protruding, situated in the interface zone. At least one excited ultrasonic source is brought into contact with one of the two parts, the ultrasonic source applying a compression effort to the two parts in a region of the interface zone located opposite the ultrasonic source. The ultrasonic source is continuously displaced at the interface zone to form a continuous welded joint by fusion of the thermoplastic material in the region positioned opposite the ultrasonic source. Such a method may find particular application for assembly of stratified parts.

Abstract: A standard non-destructive testing probe (4) may be coupled with a localization system (10) according to the invention so as to determine the position of the apparatus (4) on the surface to be analyzed (1) at any moment. The localization system (10) comprises an ultrasonic emitter (12) and two ultrasonic receivers (14, 16) coupled with means for determining the distance between the emitter (12) and the receivers (14, 16), each of the components being able to be moved freely relative to each other. The coupling between the emitter (12) and the probe (4) allows the position of the latter to be determined by triangulation. A localization and mapping method is also described.