摘要:
A ram jet engine including a combustion chamber ending in a gas injection nozzle, a cruising propulsion unit fee ding liquid propellant into the combustion chamber, and at least one air duct for feeding air intended for combustion of the fuel in the combustion chamber. A rigid tubular element is incorporated into the ramjet engine, with an interior volume of the rigid tubular element being divided into two spaces by an intermediate transverse partition. One of the spaces houses the cruising propulsion unit while the other space houses the combustion chamber. Passages are cut into the intermediate transverse partition to allow feeding of liquid fuel into the combustion chamber, and the air duct is mounted on the tubular element to feed the combustion air through the tubular wall of the tubular element.
摘要:
A method of determining an optimal flight path of an aircraft during its cruising phase includes forming a grid in a vertical plane of the space between a first position and a second position, selecting various path portions between the first position and the second position, determining the cost of each of the path portions, determining various possible paths from the path portions, determining the cost of each of the possible paths, and selecting the lowest-cost path.
摘要:
A system for aiding the clearing of mines includes an equipment assembly composed of a portable processing unit (10) having multimedia capabilities, a helmet (12) with projection by overprinting, at least one position sensor (13) integral with the helmet and a camera for taking shots (14), capable of recording the actions of the operator. The system further includes a software assembly composed of software for the management of a data base of the various existing mines, software for the creation of synthesis and animation images, software for retouching an image which allows the images to be improved, and vocal command software.
摘要:
Computational rig (20) consisting of two distinct parts (2, 21), linked together in a removable manner by cooperating contactors (9, 16), said parts respectively including the central processing unit (6) and a non-volatile memory block (12A) supporting the software program of said computational rig.According to the invention, said non-volatile memory (12A) is electrically erasable and programmable and the part (21) moreover includes:a memory (22) supporting a program for loading said software program into the memory block (12A);means (23) of connection of the part (21) to a communication channel (24); anda bidirectional communication peripheral device (25), arranged between the means of connection (23) and the loading memory (22).
摘要:
A method of making a connecting rod made of composite material, especially for internal-combustion engines, the composite material being formed by a reinforcement embedded in a cured material, and the connecting rod (A) comprising, along the longitudinal extension (X-X) of the connecting rod, a central shank (B) extended respectively, at its two ends, by a connecting-rod big end (C) and a connecting-rod small end (D). The connecting rod (A) is produced entirely as a single component made of composite material and the reinforcement of the composite material comprises superposed plies of crossed straight filling yarns, the filling yarns, which extend parallel to the longitudinal extension (X-X) of the connecting rod (A), constituting at least twice the volume percentage of the filling yarns which extend in each of the directions other than the longitudinal extension (X-X) of the connecting rod (A), and binding yarns which pass through the superposed plies.
摘要:
A photosensitive detector (1) for detecting luminous flashes (2) is provided with a photosensitive diode (3) which is linked to a positive voltage and to ground via a resistor R1 and which is capable of transforming the luminous flashes into electrical signals and a circuit (4) that processes the electrical signals generated by the photosensitive diode (3). The circuit (4) causes electrical signals which correspond to luminous flashes (2) received by the photosensitive diode (3) and which exhibit a fast rise time to be strengthened, and the circuit (4) causes electrical signals which correspond to luminous flashes (2) received by the photosensitive diode (3) and which vary more slowly in intensity to be attenuated. The circuit (4) is linked directly to the photosensitive diode (3) and includes a differentiator circuit. The differentiator circuit has a differential amplifier (5) with a non-inverting input linked to a connection point situated between the photosensitive diode and the resistor R1, an inverting input linked to ground via a capacitor and to the connection point via a resistor Rx, and an output, and the differential amplifier (5) also has a resistor R2 linked to a connection point between the capacitor and the inverting input.
摘要:
The present invention relates to a homing head mounted on a flying body, and intended to guide the flying body towards a target. According to the invention, the homing head includes a target detection system (SD1) comprising a system (SI1) for identifying luminous flashes originating from the target, and a target locating system (SL1), which includes a photosensitive detector (D1) mounted fixedly on the flying body and comprising a matrix of photosensitive sensors, and a means of focussing (6) which projects onto said matrix of the photosensitive detector (D1) the image of the scene situated fore of the flying body.
摘要:
Switching apparatus for automatically interconnecting a first unit with a second unit, the apparatus having a first input/output assembly connected to the first unit and a second input/output assembly connected to the second unit, and including both at least one switch card each provided with at least one switch element, and a control unit for the card for establishing or not establishing interconnections between the first and second units as a function of determined instructions issued to said control unit, the control unit also including means for enabling the physical configuration of said switching apparatus to be input, and means suitable, once said input has been performed, for automatically interconnecting the first unit with the second unit in accordance with the instructions issued to the control unit by a user.
摘要:
A mobile craft is guided with respect to a trajectory. To guide the craft, the distance xtk is determined between the mobile craft and the point of orthogonal projection of the mobile craft on a segment of the trajectory. The angle tkae is determined between the direction of travel of the mobile craft and the direction at the point of orthogonal projection. A control value is computed for the lateral attitude from the distance and angle, two characteristic coefficients and a nominal control value. This control value is applied to the craft.
摘要:
A magnetic actuator, for example a magnetic bearing, embodies a fixed part and a mobile part. These parts are ferromagnetic and form an airgap between them extending parallel to a predetermined first direction. The magnetic actuator further embodies a nonmagnetic wall interposed in the airgap. The wall is that of a confinement chamber, for example. In this magnetic actuator one of the fixed and mobile parts embodies fingers penetrating the nonmagnetic wall and directed towards the other of the fixed and mobile parts.