Messier-bugatti-dowty

Safran Landing Systems

David Lemay

David Frank

Michel Basset

Yann Chamaillard

Jean-Baptiste Vaney

Clément Gorce

Anthony Sorin

A method of managing the braking of an aircraft having landing gear with wheels fitted with friction brakes and with auxiliary brakes that enable energy to be dissipated by other than friction. The method comprises the steps of, (1) when braking is requested, testing the braking parameters to determine whether the aircraft is in a braking situation for which the friction brakes are not essential for providing the requested braking, and (2) performing the requested braking by giving priority to actuating the auxiliary brakes so long as the aircraft remains within the braking situation, and actuating the friction brakes only if the aircraft departs from the braking situation.

Method of managing the braking of an aircraft, and a corresponding braking system

A control method for controlling an electric motor driving rotation of an aircraft wheel () for generating a torque command for controlling the motor, the method being characterized in that it comprises implementing:

Method of controlling an electric motor for driving rotation of an aircraft wheel

The invention relates to a management method for managing a turning movement of an aircraft taxiing on the ground, the aircraft having wheels each fitted with an independent drive device, in which method commands are generated for the independent drive devices so that at least some of those devices contribute to the turning movement. According to the invention, the method comprises the steps of:

Method of managing a turning movement of an aircraft taxiing on the ground

A method of managing the braking of an aircraft, the aircraft having a plurality of wheels R, . . . , R, each fitted with a brake F, . . . , Fadapted to generate a braking force in response to brake pedalsbeing depressed. The management method comprising the steps of: distributing the wheels fitted with respective brakes in at least two distinct groups G1, G2, G3, G'1, G&#x2032;2, G&#x2032;3; allocating respective relationships to each of the groups of wheels for determining how braking force varies as a function of the depression of the brake pedals; and modifying the distribution of the wheels in response to a predetermined event occurring.

Method of managing the braking of an aircraft

A method of managing the braking of an aircraft, the aircraft having a plurality of wheels R, . . . , R, each fitted with a brake F, . . . , Fadapted to generate a braking force in response to brake pedalsbeing depressed. The management method comprising the steps of (1) distributing the wheels fitted with respective brakes in at least two distinct groups G, G, G, G', G&#x2032;, G&#x2032;; (2) allocating respective braking relationships to each of the groups of wheels for determining how braking force varies as a function of the depression of the brake pedals; and (3) acting at predetermined intervals to permutate the allocation of the relationships to the groups in application of a predefined permutation relationship. The method also includes a step of modifying the permutation relationship in response to the occurrence of a predetermined event.

A method of controlling a yawing movement of an aircraft running along the ground, the aircraft comprising at least one first landing gear with a steerable bottom part bearing wheels. The method comprises the steps of (1) on the basis of a yaw rate setpoint {dot over (&#x3c6;)}, determining a wheel-steering prepositioning angle &#x3b8;; and (2) using closed-loop control which as its input has the yaw rate setpoint and which generates a command to steer the bottom part in order to steer it through a steering angle &#x3b8;equal to the sum of this prepositioning angle &#x3b8;and of an angle &#x3b8;which is determined taking account of an error between the yaw rate setpoint {dot over (&#x3c6;)}and the measured yaw rate {dot over (&#x3c6;)}when the steerable bottom part is steered by the steering angle &#x3b8;.

Method of controlling the yawing movement of an aircraft running along the ground

The invention relates to a method of managing movement of an aircraft on the ground, the aircraft including at least one left main undercarriage and at least one right main undercarriage, each comprising wheels associated with torque application members for applying torque to the wheels in response to a general setpoint, the general setpoint comprising a longitudinal acceleration setpoint and an angular speed setpoint, the method including the successive steps of braking down the general setpoint into general torque setpoints for generating by the torque application members associated with each of the wheels.

Growing community of inventors

Chaville, France

David Lemay