公开(公告)号：US09169002B2

公开(公告)日：2015-10-27

申请号：US13779397

申请日：2013-02-27

Applicant: MESSIER-BUGATTI-DOWTY

Inventor： Michael Benmoussa ,  David Poiret ,  Jerome Fraval

IPC: B64C25/50 ,  B64C19/00 ,  G05D1/00

CPC classification number: B64C19/00 ,  B64C25/50 ,  G05D1/0083

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＆amp; est; est。 参考角度＆amp; 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。

公开(公告)号：US10005547B2

公开(公告)日：2018-06-26

申请号：US15151593

申请日：2016-05-11

Applicant: MESSIER-BUGATTI-DOWTY

Inventor： Jerome Fraval ,  David Frank

IPC: B64C25/58 ,  B64C25/50 ,  B64C25/34 ,  F16F9/12 ,  F16F9/18

CPC classification number: B64C25/505 ,  B64C25/34 ,  B64C25/58 ,  F16F9/12 ,  F16F9/182

Abstract: The invention relates to an aircraft undercarriage comprising: a strut (1) for connecting to the aircraft, a slide rod (3) slidably engaged in leaktight manner in the strut via the bottom opening, which rod carries at least one wheel at its bottom end, a diaphragm (7) carried by a support (8) attached to the top wall of the strut to cooperate in leaktight manner with an inside wall of the slide rod so as to define a first chamber (C1) under the diaphragm inside the rod and completely filled with hydraulic fluid, and a second chamber (C2) above the diaphragm and partially filled with hydraulic fluid, a throttle needle (10) secured to the slide rod and penetrating into a calibrated orifice (12) in the diaphragm so as to define a calibrated fluid passage between the first and second chambers, and angular connection means for imposing an angular position on the slide rod relative to the strut. According to the invention, the undercarriage includes at least one vane (20) fastened to the end of the throttle needle in order to extend inside a portion of the second chamber that is filled with hydraulic fluid.