摘要:
A design method for designing a part made from 3D woven composite material, implemented by computer, the design method comprising: a step (F1) of obtaining shape data (SHAPE) representing the outer surface of the part, for each point (PT) of a set of points of the outer surface, a step (F5, F6) of determining a distance (d) between said point and the projection of said point onto a target surface, according to a predetermined projection direction, and a step (F8) of determining the structure of a 3D woven preform depending on the determined distances (d), characterised in that it comprises a step (F2) of obtaining projection data (F) indicating a projection direction depending on the position of a point on the outer surface of the part, wherein, for at least one portion of the points (PT) of the set of points, during the step (F5) of determining a distance, the projection direction used is determined according to said projection data (F) and the position of said point.
摘要:
A system for selectively C, Z or half-folding sheet(s) of paper of variable format, comprising: - a pocket-like channel (10) with a stop element (12) for defining a paper sheet position and positioning the sheet(s) according to a location of a recipient's address A and a type of fold required, - two folding rollers (2, 4) arranged diametrically opposite to each other and forming a folding/nipping area (6), - an inducing element (8) movable towards and away from the folding/nipping area for defining a fold line position, and - a curved guiding path (14, 16, 18, 20, 22, 24, 26) which substantially covers at least one of the two folding rollers for receiving and guiding the sheet(s) completely around one or the other of the two folding rollers without changing their rotational direction during the folding cycle.
摘要:
Gas turbine auxiliaries relay gearbox having a front lateral face (12), a rear lateral face (14) opposite the front lateral face and a peripheral rim (16) of which closes the gearbox, and in which there are mounted at least one set of gears (18) made up of several gear wheels (20) meshing with one another, each gear wheel being carried by a central shaft held at each of its two ends by a rolling bearing (30a, 30b) and intended to be coupled to a power shaft (24a) to drive an auxiliary (24), the gearbox further comprising, mounted between said central shaft and said power shaft, means (40, 42, 44, 46, 48) of uncoupling said auxiliary which means consist of a dog clutch (40) the axial teeth (40b) of which collaborate with a complementary toothset (20b) of said central shaft, said dog clutch comprising internal splines (40a) in mesh with corresponding external splines belonging to said power shaft and in that said uncoupling means are operated by an electric actuator (46) acting on the movement of a plunger pin (46a) one end of which collaborates with an external helical groove (40d) of said dog clutch.
摘要:
A generation method performed by a generator module of an electricity network of an aircraft, the electricity network including a power supply line powered by the generator module, a DC bus powered from the power supply line via a rectifier, and at least one electrical actuator powered with AC from the DC bus via an inverter. The generation method includes: delivering an AC voltage as a function of a voltage setpoint and of a voltage measured in the on-board network; and determining the voltage setpoint as a function of an operating parameter of the actuator.
摘要:
The invention relates to a method for monitoring a filter (3) of the fuel-supply system (1) of an aircraft engine, including: a step of detecting clogging of the filter, and a step of sending an indication message, characterised in that it includes: a step of determining a current phase among a plurality of consecutive phases of an aircraft mission, including at least one phase during which the clogging of the filter is not likely to be caused by ice and a phase during which the clogging of the filter is likely to be caused by ice, and in response to detecting clogging, a step of determining a type of clogging in accordance with said current phase, in which, during the step of sending an indication message, the message sent depends on the type of clogging.
摘要:
According to the invention the control of a fuel metering device (3) for turbomachine as a function of a mass flow rate setpoint (Wf32) comprises the selection, as a function of at least one validity criterion, of a mass flow rate from among: - a mass flow rate calculated as a function of a position signal, - a mass flow rate calculated as a function of the position signal and of at least one temperature measurement signal, - a mass flow rate calculated as a function of the position signal and of at least one permittivity measurement signal, - a mass flow rate calculated as a function of the position signal, of at least one temperature measurement signal and of at least one permittivity measurement signal, and - a mass flow rate calculated as a function of a temperature measurement signal, of a permittivity measurement signal, and of a volume flow rate measurement signal.
摘要:
Device for weighing flat objects in motion comprising a conveyor (12) for conveying the flat objects along an horizontal transport path (14), a weighing plate (16) facing the transport path and comprising a set of free rollers (160) for receiving the flat objects, and a weighing sensor (18) attached to the weighing plate for measuring the weight of the flat objects, wherein the weighing sensor is arranged above the transport path and the conveyor is adapted to move vertically in order to press the flat objects in motion against the weighing plate.