VIBRATION ATTENUATOR

A vibration attenuator (117) for an aircraft (101) has first and second coaxial spinners (121, 133) configured for rotation about a mast axis (115) and relative to a rotor (109). Upper and lower weights of each spinner (121, 133) are spaced radially from the axis (115) and positioned 180 degrees fro...

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Bibliographische Detailangaben
Hauptverfasser:	HEVERLY, David, PARHAM, Thomas C, RAUBER, Richard E, STAMPS, Frank Bradley, SMITH, Michael R, SEIFERT, Michael Scott, MILLER, Gary, CHOI, Jouyoung Jason
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AEROPLANES AIRCRAFT AVIATION BLASTING COSMONAUTICS ENGINEERING ELEMENTS AND UNITS FOR PERFORMING MECHANICAL WORK IN GENERAL GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL HEATING HELICOPTERS LIGHTING MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY PERFORMING OPERATIONS SHOCK-ABSORBERS SPRINGS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A vibration attenuator (117) for an aircraft (101) has first and second coaxial spinners (121, 133) configured for rotation about a mast axis (115) and relative to a rotor (109). Upper and lower weights of each spinner (121, 133) are spaced radially from the axis (115) and positioned 180 degrees from each other about the axis (115). The weights of each spinner (121, 133) are spaced from each other a distance parallel to the mast axis (115), each weight rotating about the mast axis (115) in a different plane. The spinners (121, 133) rotate together relative to the rotor (109) at a selected angular rate and are selectively rotatable relative to each other between a minimum-moment configuration, in which the upper weight of each spinner (121, 133) is angularly aligned with the lower weight of the other spinner (121, 133), and a maximum-moment configuration, in which the upper weights are angularly aligned and the lower weights are angularly aligned, producing a whirling moment about the mast axis (115) as the spinners rotate(121, 133).