Abstract: A method for operating an aircraft includes the steps of receiving guidance instructions and guidance parameters at a navigation computer, and transmitting automatic pilot instructions from the navigation computer to a flight control computer. The method also includes the steps of receiving control instructions and the automatic pilot instructions at the flight control computer, and generating operating commands at the flight control computer. In an automatic pilot mode, the operating commands are generated at the flight control computer based on the automatic pilot instructions.

Abstract: A system for operating an aircraft includes a navigation computer and a flight control computer. The navigation computer receives guidance instructions and guidance parameters, and outputs automatic pilot instructions. The flight control computer receives control instructions and the automatic pilot instructions, and generates operating commands based on the automatic pilot instructions in an automatic pilot mode.

Abstract: A system and process for countering the vibrations induced in an aircraft by the windmilling of an engine fan may produce a first electric flight control command for a servocontrol to use in actuating a control surface of the aircraft. The servocontrol is slaved to the first electric flight control command, and the servocontrol's operation is limited to a reduced frequency band. Vibrations induced by the windmilling of the engine fan are monitored, and, when the monitored vibrations exceed a threshold, a second electric flight control command for application to the servocontrol is computed to oppose the induced vibrations. Also, the first and second electric flight control commands are summed to produce an overall control command for the control surface, and the servocontrol is temporarily slaved to the overall control command for operation in a widened frequency band.

Abstract: An inertial reference system for an aircraft includes two accelerometers and a gyrometer. One accelerometer is located at a front portion of the aircraft, the other is located at a rear portion of the aircraft. The gyrometer is located at a center portion of the aircraft. The system also includes a control computer linked to the accelerometers and to the gyrometer. The center portion can include the aircraft's center of gravity.

Abstract: A method for controlling an aircraft includes the steps of receiving acceleration data related to an acceleration of a front portion of the aircraft, and receiving pitch, roll, and/or yaw rate data related to a rate of a center portion of the aircraft. The method also includes a step of generating a pitch, roll, and/or yaw command based on the acceleration data and on the rate data.

Abstract: A method for operating an aircraft includes the steps of receiving guidance instructions and guidance parameters at a navigation computer, and transmitting automatic pilot instructions from the navigation computer to a flight control computer. The method also includes the steps of receiving control instructions and the automatic pilot instructions at the flight control computer, and generating operating commands at the flight control computer. In an automatic pilot mode, the operating commands are generated at the flight control computer based on the automatic pilot instructions.

Abstract: Process for countering the vibrations induced in an aircraft by the windmilling of a fan and system of electric flight controls implementing this process.

Abstract: An inertial reference system for an aircraft includes two accelerometers and a gyrometer. One accelerometer is located at a front portion of the aircraft, the other is located at a rear portion of the aircraft. The gyrometer is located at a center portion of the aircraft. The system also includes a control computer linked to the accelerometers and to the gyrometer. The center portion can include the aircraft's center of gravity.

Abstract: A method for controlling an aircraft includes the steps of receiving acceleration data related to an acceleration of a front portion of the aircraft, and receiving pitch, roll, and/or yaw rate data related to a rate of a center portion of the aircraft. The method also includes a step of generating a pitch, roll, and/or yaw command based on the acceleration data and on the rate data.

Abstract: Method and device for reducing the vibratory motions of the fuselage of an aircraft. According to the invention, accelerometers (9, 10) are mounted on engines (M1, M4) of the aircraft (1) and, with the aid of the accelerometric measurements thus obtained and of the aeroelastic model of said aircraft, control commands (dZ, dY) to be applied to the ailerons (M1 to M4) so as to counteract the oscillations of said engines are determined.

Abstract: A system for operating an aircraft includes a navigation computer and a flight control computer. The navigation computer receives guidance instructions and guidance parameters, and outputs automatic pilot instructions. The flight control computer receives control instructions and the automatic pilot instructions, and generates operating commands based on the automatic pilot instructions in an automatic pilot mode.

Abstract: An aircraft with electrical fly-by-wire controls is equipped with an automatic pilot having a navigation computer producing automatic pilot instructions that are sent directly to a flight control computer. The flight control computer produces commands for operating the automatic pilot in respect of the actuators for control surfaces on the aircraft.

Abstract: According to the invention, in this aircraft, the elements of the inertial reference system are separated according to whether they are intended for navigation (CI) or flight control (5, 6, 7). The accelerometers (5 and 6) intended for flight control are arranged at a vibration antinode, while the gyrometers (7) dedicated to flight control are placed at a vibration node. The accelerometers (5 and 6) and the gyrometers (7) are connected to the flight control computer (12) and their measurements serve as flight control parameters.

Abstract: Method and device for reducing the vibratory motions of the fuselage of an aircraft.

Abstract: According to the invention, in this aircraft, the elements of the inertial reference system are separated according to whether they are intended for navigation (CI) or flight control (5, 6, 7). The accelerometers (5 and 6) intended for flight control are arranged at a vibration antinode, while the gyrometers (7) dedicated to flight control are placed at a vibration node. The accelerometers (5 and 6) and the gyrometers (7) are connected to the flight control computer (12) and their measurements serve as flight control parameters.

Abstract: An electrical fly-by-wire system for operating an aircraft rudder includes a low-pass filter, arranged between a rudder bar and an actuator of a rudder. The low-pass filter receives a control command from the rudder bar corresponding to the degree of travel the rudder bar has experienced from a neutral position. Based on the amplitude of the control command, the filter generates an operating command for the actuator. Additionally, the filter operates such that the higher the fraction of the rudder bar's travel away from the neutral position, with respect to its maximum value of travel, the higher the filter's time constant is set.

Abstract: Electrical fly-by-wire system for operating an aircraft rudder.

Abstract: Aircraft with electrical fly-by-wire controls, equipped with an automatic pilot.