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8160770 |
Method and device for detecting oscillatory failures in a position servocontrol subsystem of an aircraft control surface
Disclosed is a method of detecting at least one oscillatory fault in at least one positional slaving chain for at least one airfoil of an aircraft. The method involves estimating a reference...
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8090485 |
Low-frequency flight control system oscillatory faults prevention via horizontal and vertical tail load monitors
The Tail Load Monitoring System detects faulty low frequency (e.g. those in the range from 0.1 to 1 Hz) oscillatory conditions caused by Flight Control System malfunctions while the aircraft is in...
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7699269 |
Intelligent multifunctional actuation system for vibration and buffet suppression
Circuits and methods for use on a mobile platform including a flight control system, a structure, an aerodynamic surface, and an actuator operatively coupled to the surface to control the surface....
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7338017 |
Methods and apparatus for vibration and buffet suppression
Apparatus and methods for hybrid actuation and suppressing vibration are disclosed. In one embodiment, a hybrid actuator includes a first actuator and a second actuator linked to move a component a...
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7175132 |
Mechanism for eliminating limit cycle oscillations on servocontrolled aerodynamic control surfaces
Servocontrolled aerodynamic control surfaces, such as the direction rudder (1) of an airplane, are equipped with servoactuators (5). The bearing supports (3) of the rotation axis (2) or hinged axis...
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6607161 |
Convertible aircraft with tilting rotors
Improving convertible aircraft of the aforementioned type mainly in terms of the active control of vibrations, while at the same time avoiding the addition of significant additional masses for...
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6565045 |
Aircraft aerodynamic surface with trailing edge deflector
An aerodynamic surface, such as a wing, empennage, angle of drift, nacelle pylon and the like for an aircraft includes at least one lightening hole pertaining to the trailing edge of the underwing,...
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6286782 |
Apparatus and method for reducing vibrations of a structure particularly a helicopter
Apparatus for damping vibrations of a structure such as the air frame of a helicopter wherein a spring system (1), which has an elastic wall structure forming a tube-shaped hollow body supports a...
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5890675 |
Process and device for damping vibrations or preventing their appearance in aircraft airframes in transonic flight
A process and device for damping vibrations or preventing their appearance in aircraft airframes in transonic flight. The aircraft has a fuselage carrying on each side a fixed wing (7) provided...
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5775637 |
Device for reducing the vibrations on the structure of a helicopter
A device for reducing the vibrations generated on the structure of a helicopter. The helicopter includes a structure with a tail boom and a fin. The structure has a longitudinal vertical mid-plane....
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5549260 |
Active control device for aircraft tail buffet alleviation
A rotatable slotted cylinder (RSC), partially embedded within the contours of a tail surface, such as an aircraft tail airfoil, serves as a force-producing element in a closed-loop active control...
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5238208 |
Load mitigation system for a multi-dimensional transducer array
A streamlined housing for supporting a multi-dimensional electromagnetic transducer array is attached to an aircraft fuselage via a pivot support. The streamlined housing is supported by the pivot...
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5203524 |
Vibration damping arrangement for aircraft
An arrangement and method for damping induced fundamental vibrations in an aircraft high lift device (3) are provided. The arrangement includes a wing (2), a high lift device (3) mounted upon and...
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5054715 |
Apparatus and methods for reducing aircraft lifting surface flutter
A device for preventing aircraft wing flutter causes the port and starboard wings of the aircraft to oscillate at different frequencies. In an exemplary embodiment, engine nacelles are suspended...
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4884748 |
Fairing flap arrangement
An external fairing flap (26) is provided with an hydraulic spring (42, 44) for causing the external flap (26) to follow the motion of an exhaust nozzle control flap (18). The external flap (26) is...
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4865269 |
Overtravel stop and neutral position lock
An aircraft flight control surface actuator that prevents against overtravel is provided with a lock which includes a pin (76) that is urged by spring (b 74) toward the wall (68) that is part of...
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4799623 |
Variable convergent/divergent nozzle
A variable area convergent divergent nozzle has floating divergent flaps which shift from a low mode to a high mode depending on internal and external pressure. The lost motion connection which...
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4502652 |
Process and apparatus for suppressing external load carrying wing flutter for aircraft
In a semi-active system for suppressing external load-carrying wing flutter in aircraft, the carrying wing (1) is provided with one or more external loads (2), and the suspension of the external...
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4496121 |
Control surface lock for flutter constraint
A control surface lock (10) for flutter constraint of a control surface (14) of an aircraft in cooperative combination with an hydraulic actuator (12), wherein system pressure on the actuator...
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4428550 |
Vibration-insulating stability improving torque force device
A conventional aircraft having horizontal stabilizers and hinged elevators, which is controlled, preferably, through push-pull rods, is provided with a dynamic torque (bob) weight connected to a...
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4109549 |
Dynamic balancer for rotating bodies and method of manufacturing same
A rotating mechanism such as a model aircraft propeller shaft is balanced by a dynamic balancing apparatus comprising a disc rotating with the shaft and a stainless steel O-ring partly filled with...
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3692260 |
DAMPING DEVICES
A hydraulic jack for actuating the flying control surface of an aircraft which includes a damper mechanically connected to the piston and cylinder assembly of the jack and effective to augment the...
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3131890 |
Aircraft control mechanism
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3119469 |
Rotary viscous fluid damper
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3047253 |
Wing vibration damper
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3045956 |
Damping control
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2859925 |
Automatic balancing arrangement for aircraft control
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2852210 |
Inertia spoiler control for aircraft
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