Method and device for the reduction of the oscillations of a div

Details Method and device for the reduction of the oscillations of a div Method and device for the reduction of the oscillations of a div

1992-06-29

1993-09-07

Barefoot, Galen

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244 1727, 416500, 416 31, B64C 2754

Patent

active

052421309

ABSTRACT:
Method and device for the reduction of the oscillations of a divergent nature induced in the fuselage (2) of a helicopter (1) by its rotary wings (3) when they are turning. According to the invention, the oscillations are detected (at 17, 18) and they are converted (at 19, 20) into electrical signals, which are used (at 13) in order to produce pitch variations of the blades (4) of the rotary wings (3), in such a way that a rotating torque vector opposing said oscillations results.

REFERENCES:
patent: 3520498 (1970-07-01), Murphy
patent: 3570786 (1971-03-01), Lewis, II
patent: 3795375 (1974-03-01), Lemnios
patent: 3954229 (1976-04-01), Wilson
patent: 4073600 (1978-02-01), Doman
patent: 4819182 (1989-04-01), King
patent: 4937758 (1990-06-01), Hayden et al.
French Search Report in applications' corresponding French patent application-Institut National Propriete Industrielle-Jul. 2, 1991.

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