Device for reducing the vibration generated on the structure of a rotary-wing aircraft
AssigneeEurocopter
InventorThomas Pierre Louis Manfredotti
Life of this patent
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Abstract
The present invention relates to a device for reducing vibration generated on the structure (2) of a rotary-wing aircraft, particularly a helicopter. According to the invention, the device (1A) comprises at least one flapping mass (3) connected to the structure (2), at least one controllable actuating device (5A) capable of causing the flapping mass (3) to flap, and a control unit (UC1) intended to control the actuating device (5A) in such a way that it causes the flapping mass (3) to flap at a frequency and at an amplitude which allows the vibrations to be reduced and minimized.
Claims14
An apparatus for reducing vibration generated on a structure (2) of a rotary-wing aircraft, said apparatus comprising:
- at least one mobile mass (3) adapted to be connected to said structure (2) and a control unit (UC1, UC2) intended to control at least one actuating means (5A, 5B, 5C, 5D) associated with said mobile mass (3) that exerts an electromagnetic force so as to reduce said vibration, wherein said mobile mass comprises a flapping mass (3) connected to a flexible blade (4) adapted to be connected to said structure (2), said actuating means (5A, 5B, 5C, 5D) exerting an electromagnetic force in order to cause said flapping mass (3) to flap, and said actuating means (5A, 5B, 5C, 5D) being controlled by said control unit (UC1, UC2) in such a way that said control unit (UC1, UC2) causes said flapping mass (3) to flap at a frequency and at an amplitude that allow said vibration to be reduced.
An apparatus for reducing vibration generated on a structure of a rotary-wing aircraft, said apparatus comprising:
- a mobile mass adapted to be connected to said structure;
- a flexible blade connected to said mobile mass, said flexible blade having a longitudinal axis and being adapted to be connected to said structure;
- an actuator operatively coupled to cause movement of said movable mass in a direction perpendicular to said longitudinal axis of said flexible blade, said actuator exerting an electromagnetic force so as to reduce said vibration;
- and
- a control unit operatively coupled to control said actuator that said control unit causes said mass to move at a frequency and at an amplitude that allow said vibration to be reduced.
Dependencies are inferred from the claim text.