Measuring and testing – Navigation – Take-off and landing monitors
Patent
1998-11-12
2000-05-30
Oen, William
Measuring and testing
Navigation
Take-off and landing monitors
G01C 2100
Patent
active
060678534
ABSTRACT:
The present invention relates to a device for reducing the vibration in the cabin (2) of a rotary-wing aircraft, especially a helicopter (He).
According to the invention, said device (1) comprises at least one sensor (C) arranged on the structure of the aircraft (He) and capable of measuring the values of at least one parameter that represents the vibration in said cabin (2); at least one controllable resonator (R), mounted directly in said cabin (2) and capable therein of generating a force which opposes said vibration; and a control unit (UC) capable of controlling said resonator (R) on the basis of the values measured by said sensor (C), so as to reduce and minimize said vibration.
REFERENCES:
patent: 4819182 (1989-04-01), King et al.
patent: 5456341 (1995-10-01), Garnjost et al.
patent: 5526292 (1996-06-01), Hodgson et al.
Teal, et al., "Active Vibration Suppression for the CH-47D", 53rd Annual Forum Proceedings, American Helicopter Society, vol. 3, Apr. 29-May 1, 1997, Virginia Beach, Virginia, pp. 211-219.
Morrison et al., "Comparison of Optimized Active and Passive Vibration Absorbers", 14th Joint Automatic Control Conference of the American Automatic Control Council, Jun. 20-22, 1973, New York, pp. 932-938.
French Search Report dated Jul. 15, 1998, 4 pages.
Eurocopter
Oen William
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