Abstract: Each loop of the device includes an evaporator and a condenser connected by an outer tube in a portion of which extends a thermally insulating sleeve having one end that can lead into the condenser and another end that surrounds a first portion (8a) of a microporous mass provided in the outer tube and pumping by capillarity a liquid-phase heat-carrier fluid flowing in the insulating sleeve of the condenser towards the evaporator, while the gaseous-phase fluid flows from a vapor-collecting central duct in a second portion of the mass of the evaporator towards the condenser in a duct inside said outer tube. The invention can be used for the thermal energy transfer from an electronic component or circuit defining a heat source in relation with the evaporator to a cold source in relation with the condenser.

Abstract: An optical transceiver assembly comprises a transmission system, a reception system and a coupling system which directs a part of the signals produced by the transmission system to the reception system. Said part of the transmission signals is detected by a photodetector matrix of the reception system, outside an useful zone of the matrix which is dedicated to the detection of the received signals. A transmission direction may therefore be determined in real time while the received signals are detected. A difference between the transmission direction and a reception direction of the transceiver assembly may then be precisely compensated for at each moment during a tracking step. The transceiver assembly may be a free space laser optical communication terminal.

Abstract: A network of switches includes N input accesses and M output accesses, with each of the switches including four ports and with the network input and output accesses being connection switch ports. The network includes at least one stage of switches, with each stage including: a pair of switch lines whose ports are not used as network input or output accesses, referred to as “interconnection switches”, a line being a set of interconnection switches connected to one another; and at least two transverse arms linking interconnection switches of different lines, a transverse arm consisting of elements that are separate from those of the other transverse arms, a transverse arm including at least two links and a switch, referred to as “transverse switch” with the connection switches being transverse switches. At least two transverse switches from different transverse arms of each stage are connection switches of the network.

Abstract: The invention relates to a method and device for forming a plasma beam. According to the invention: the quality of the electroneutrality of the plasma beam (PB) is detected (in 12 and/or 13); and the alternating polarisation potentials of the extraction and acceleration grid (4) are adjusted such that the plasma beam (PB) is at least approximately electrically neutral.

Abstract: A device for controlling the attitude of a satellite exploiting solar pressure, includes at least two solar generators destined to be arranged on either side of a central body of the satellite and each having one face to be exposed to the Sun, referred to as “front face”, the device also including at least three surfaces whose optical properties can be commanded. The surfaces whose optical properties can be commanded are arranged on flaps connected to solar generators, each flap being fixed with respect to the solar generator to which it is connected, and such that, in the operating position, at least two of the surfaces are not parallel when the front faces of the solar generators are optimally oriented with respect to the Sun. The device further includes a module for commanding the optical properties of each surface whose optical properties can be commanded.

Abstract: To analyze an electronic component, this component is exposed to a focused laser beam. The information provided by the laser mapping relating to the position and to the depth of the sensitivity zones of the component is used as input parameter in prediction codes for quantifying the sensitivity of the mapped component to ionizing particles in the natural radioactive environment. The prediction codes are used to determine the occurrence of malfunctions in the electronic component. Determination of the risks associated with the radiative environment imposes two aspects: one, probabilistic, takes into account the particle/matter interaction and the other, electrical, takes into account the charge collection inside the electronic component.

Abstract: A space survey system includes networked optical surveying systems designed to scan areas of earth orbit, in particular the LEO layer, arranged in a grid on the surface of a planet and further includes means designed to acquire images of objects traversing the areas scanned by the optical systems and calculation means designed to realize a measurement of the position time series of objects crossing the scanned areas by short integration over a fixed field.

Abstract: An optical system for surveillance systems for space surveillance systems includes at least one telescope with a field greater than or equal to 5° mounted on a mobile mount along two axes, and coupled with an image sensor, whose sensitivity is designed for an integration time of the order of magnitude of a hundred milliseconds.

Abstract: A method of using an image sensor onboard a satellite or an aircraft comprises two simultaneous sequences of image capture. The first sequence corresponds to a capture of observation images, and the second sequence corresponds to a capture of images dedicated to the detection of a shifting of the observation images. The images dedicated to the detection of the shifting are restricted to windows that are at least in part contained in a main window the of observation images. Furthermore, said images dedicated to the detection of shifting are captured at a frequency greater than a frequency of the observation images.

Abstract: A method (10) for estimating a carrier's movement relative to an environment (20) with respect to which the carrier moves, the carrier having at least one navigation sensor and one vision sensor producing 2D images of the environment installed, The method (10) includes the following steps: i) (12) identifying, in images acquired by the vision sensor, characteristic elements of the images representing characteristic elements of the environment, ii) (14) calculating, based on characteristic elements of a triplet of images acquired at different times, at least one condensed measurement representative of characteristics of the carrier's movement during the acquisition of the triplet's images, iii) (16) estimating the movement by a navigation filter, based on navigation measurements made by the navigation sensor and on the at least one condensed measurement. A computing device for a navigation system of a carrier is also described.

Abstract: According to the invention, a transmitting beacon (4) comprises at least two transmitting current loops (6.1, 6.2, 6.3) which are mutually orthogonal and capable of transmitting electromagnetic waves (5.1, 5.2, 5.3), as well as means (7) for supplying power to said transmitting current loops (6.1, 6.3) in series.

Abstract: The method CND of non-destructive testing of a wind turbine blade includes: stressing the structure of the blade through a modification of a physical characteristic of a fluid filling the hollow interior volume of the blade; observing zones to be tested of the exterior surface of the blade, with the contactless measurement of a physical parameter on points of the exterior surface of the blade; and comparing the map of the values of the physical parameter measured with a reference map. A corresponding system CND for checking the structural integrity of a wind turbine blade includes an aerothermic device for modifying the physical conditions, temperature or pressure, of a fluid filling the hollow interior volume of the blade, a device for contactless measurement of a physical parameter, temperature or dimensions, of the exterior surface of the blade, and a device for processing the measurements.

Abstract: A service admission control method in a communication network comprising at least one group of at least one node per group, the method comprising the steps: Receive a service establishment attempt from one group; and admit the service in the network depending on the granularity of the network topology, the link topology and/or the partitioning of the link topology.

Abstract: A method for realizing a space survey system for the LEO zones of the Earth orbit includes positioning and placing network stations of optical survey systems over the surface of the globe according to a grid designed to offer an effective daily cycle of the system close to 24 hours and a chosen revisit period for the LEO zone observed.

Abstract: A heat protection material for a surface, made of a mixture comprising a resin, cork granules and refractory fibers; the proportion of cork granules in the mixture is 50 to 80% by mass, wherein the corresponding proportion of refractory fibers in the mixture is 1 to 11% by mass.

Abstract: A heat protection material for a surface, made of a mixture comprising a resin, cork granules and refractory fibers, wherein the proportion of cork granules in the mixture is 50 to 80% by mass.

Abstract: A method for controlling the attitude of a satellite in orbit around a celestial object, the satellite including an observation instrument, a solar panel, a radiator and a star sensor which are arranged on the satellite such that, in a reference frame associated with the satellite and defined by three orthogonal axes X, Y, and Z, the observation instrument has its observation axis parallel to the Z-axis, the solar panel is parallel to the Y-axis, the radiator is arranged on one of the sides ?X, +Y, or ?Y of the satellite, and the star sensor points to the negative X values side. The roll and pitch attitudes of the satellite are controlled during an activity period to direct the observation instrument towards areas of the celestial object to be observed, and the yaw attitude of the satellite is controlled to keep the sun on the positive X values side and ensure that a solar panel minimum insolation constraint is satisfied during observation phases of the activity period.

Abstract: According to the invention, the device (1) comprises a bolt (6) including a locking member (9) which is mounted such that it can slide with respect to a first component (2) and can adopt a locked position in which the locking member (9) retains the second component (3) and an unlocked position in which the locking member (9) releases the second component (2), the transition from the locked position to the unlocked position taking place under the action of pyrotechnic means (5). In addition, a branch (4) that is at least partially deformable under the action of the pyrotechnic means (5) is arranged with respect to the holt (6) in such a way that the transition from the locked position to the unlocked position takes place by means of the deformation of said branch (4).

Abstract: A material for protecting a surface from heat made of a mixture comprising cork granules and resin as a binding agent, which also includes short fibers of heat-resistant material, and phenolic resin or epoxy resin.

Abstract: A tank includes a tank body, a liner and a composite body spooled onto the liner, and at least one mounting, wherein the liner and the composite body are adhesively bonded together apart from in an annular joining region between the body of the tank and the mounting, surrounding the mounting.