Abstract:
The invention relates to a brake actuator for an aircraft hydraulic brake, which is intended to be added into one of the cavities of a brake ring, the actuator comprising a liner (1) designed to be housed sealingly in the cavity of the ring, a piston (3) mounted to slide sealingly in the liner along an axis of sliding (X) so as to apply a braking force on friction pads when a fluid is introduced under pressure into the cavity, and having a determined operational travel, a wear compensation device (10) which defines a position to which the piston retreats into the liner by means of a mobile stop (11) that can be moved forward by the piston as a braking force is applied, and an elastic return member (16) returning the piston towards the retracted position bearing against the mobile stop. According to the invention, the mobile stop is reduced to a friction member rubbing against the liner, such that one of the faces of the friction member serves as a stop defining the retracted position of the piston, and the other of the faces serves as a support for the elastic return member, the elastic member having, when compressed, a sufficient increase in force in order to be able to push back the mobile stop in the event that the piston is not in contact with the friction pads while its operational travel is already exhausted.
Abstract:
An aircraft landing gear assembly includes a lock link and a rotary electromechanical actuator which includes motor and gearbox unit arranged to move a pawl into contact with the lock link to break the lock link. A release mechanism is provided to enable the lock link to be made in the event of the motor and gearbox unit jamming.
Abstract:
The invention relates to a measurement device for measuring the rotational speed of a vehicle wheel, the measurement device comprising a body (22) incorporating: a rotor (30) which can be rotated by the wheel and on which at least one permanent magnet (33) is mounted; a stator (31) comprising a winding (36) generating a measurement voltage when the wheel (2) and therefore the permanent magnet turn, the measurement voltage being indicative of the rotational speed of the wheel; an electronic board (32) comprising processing means for processing the measurement voltage; power supply means designed to generate, from the measurement voltage, a power supply voltage intended to power the electronic board.
Abstract:
An aircraft landing gear comprising an axle (3) intended to receive a wheel (4) comprising a rim (6) mounted to rotate on the axle (3) by means of at least one rolling bearing (8). The rolling bearing (8) comprises an inner ring (11) mounted around the axle (3) and an outer ring (12) rotationally secured to the rim (6) of the wheel (4). The landing gear further comprising a measurement device (21) intended to perform measurements of at least one operating parameter of the landing gear. The measurement device (21) is incorporated in the rolling bearing (8) by being secured to one of the inner or outer rings of the rolling bearing (8).
Abstract:
Sensor (1) comprising: a casing (2) delimiting an internal volume (3) and having a passage (31) between this internal volume and a first external zone (Z1) external to the casing; a moving part (4) able to move inside the said internal volume (3); detection means (5) for detecting a movement of the said moving part (4) comprising a detection portion (51) extending in the passage (31), and having a groove (52) open to the outside of the detection portion (51), this groove (52) extending between the said first external zone (Z1) external to the casing and the said internal volume (3) internal to the casing. The sensor (1) comprises first sealing means (14) positioned around the detection portion (51) inside the passage (31), these first sealing means (14) being arranged in such a way as to prevent fluid from passing between the internal volume (3) and the first external zone (Z1) via said groove (52).
Abstract:
The invention relates to an aircraft undercarriage intended to be mounted so as to be able to move on the aircraft between a deployed position and a retracted position, the undercarriage comprising a roller (1) carried by a support (4) secured to the undercarriage while being able to be moved with respect thereto, characterised in that the support is mounted pivotally on the undercarriage.
Abstract:
The invention relates to a method for managing an electric motor (6) intended to drive rotationally a wheel (4) of an aircraft (1), the method comprising the step of short-circuiting the phases of the electric motor (6) when the aircraft (1) is in a period of deactivation of the motor (6) during which it is envisaged not using the electric motor (6).
Abstract:
The invention relates to a disc brake for an aircraft wheel, comprising friction discs (20,30), including rotor discs and stator discs, a structure comprising a torsion tube (11) on which the discs are fitted, a rear plate (12) which is located at one end of the tube, and a support (13) for braking actuators (14,15) at another end of the tube, the actuators being able to be selectively activated in order to apply a pressing force to the discs. According to the invention, the discs are separated into two groups, including a first group (20) which can be used alone for taxiing braking operations, and a second group (30) which can be used alone or in conjunction with the first group for take-off/landing braking operations.
Abstract:
The invention relates to aircraft landing gear comprising: a leg (12) for hinging to a structure of the aircraft so as to be movable between a deployed position and a retracted position, a main brace (15), a secondary brace (20), and an unlocking actuator (30) having a first end coupled to the secondary brace and controllable for causing its links to move out of alignment against the action of the resilient member during retraction or deployment of the landing gear. According to the invention, the unlocking actuator is of the double-acting type and the landing gear includes coupling means (31, 33) for coupling to a second end of the unlocking actuator, which means ensure movement of said second end relative to the leg so that, for a given action, the unlocking actuator tends to break the alignment of the links when the landing gear is in one of its positions and tends to confirm said alignment when the landing gear is in its other position.
Abstract:
A method of managing a steering command for a steerable portion 3 of nose landing gear 2 of an aircraft 1. The method implements servo-control to servo-control of a steering actuator 6 to an angle position setpoint θset for the steerable portion 3. The servo-control includes calculating an error ε by subtracting a reference angle θest from the angle position setpoint θset. The reference angle θest is an angle determined by calculation as a function of a longitudinal speed Vlong and a yaw rate τ of the aircraft 1.
Abstract translation:管理飞机1的起落架2的可转向部分3的转向命令的方法。该方法实现伺服控制以将转向致动器6的伺服控制转换成角度位置设定点;为可转向部分3设定 伺服控制包括计算误差&egr; 通过从角度位置设定点&thetas; set中减去参考角度& est; est。 参考角度& est;是通过作为飞行器1的纵向速度Vlong和横摆角速度τ的函数的计算确定的角度。