[특허]Hybrid active-passive noise and vibration control system for aircraft

Hybrid active-passive noise and vibration control system for aircraft 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16F-007/10
출원번호	US-0730773 (1996-10-16)
발명자 / 주소	Jolly Mark R. Rossetti Dino J. Norris Mark A. Miller Lane R.
출원인 / 주소	Lord Corporation
대리인 / 주소	Wayland
인용정보	피인용 횟수 : 55 인용 특허 : 0

초록 ▼

A hybrid active-passive system (20) for reducing noise within a passenger compartment and vibration of a fuselage of a vehicle, such as an aircraft (turboprop, turbofan, or helicopter). The hybrid active-passive system (20) includes, in combination: an active acoustic producer such as a loudspeaker (35), Active Vibration Absorber (AVA) (34), or active absorber assembly (39) for producing antinoise within the compartment (42), and a passive resonant device, such as a passive Tuned Vibration Absorber (TVA) (36), or passive TVA assembly (37) for controlling vibration of the fuselage or structural supports interconnecting the disturbance source (e.g. power plants (26), propellers (28a), gearbox (57), main rotor (28m), tail rotor (28t)) and the fuselage wall (25).

대표청구항 ▼

[ What is claimed is:] [1.] An active system for reducing interior noise and vibration of an aircraft, said aircraft having a fuselage which includes a fuselage wall at least partially defining a passenger compartment, said fuselage and said passenger compartment being exposed to noise and vibration caused by at least one disturbance source interconnected to said fuselage wall by a support structure, said system comprising in combination:(a) reference signal generating means for deriving at least one reference signal representative of at least one disturbance frequency of said at least one disturbance source,(b) a first plurality of passive resonant devices attached to at least one selected from a group consisting of:i) said support structure, andii) said fuselage,(c) a second plurality of active acoustic producers for generating cancelling acoustic noise within said passenger compartment which are attached to at least one selected from the group consisting of:i) said support structure, andii) said fuselage, said second plurality of active acoustic producers being attached at separate and distinct points from those points at which said first plurality of passive resonant devices are attached,(d) error sensor means for providing a plurality of residual error signals indicative of a residual acoustic noise at a plurality of locations within said passenger compartment, and(e) controller means for processing said at least one reference signal and said plurality of residual error signals and providing a plurality of cancelling signals to drive said plurality of active acoustic producers.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Hybrid active-passive noise and vibration control system for aircraft 원문보기

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연합인증

Hybrid active-passive noise and vibration control system for aircraft 원문보기

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