[특허]Helicopter active noise control system

[미국특허] Helicopter active noise control system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64C-027/00
출원번호	US-0870434 (1992-04-16)
발명자 / 주소	Yoerkie Jr. Charles A. (Newington CT) Welsh William A. (North Haven CT) Sheehy Thomas W. (Hamden CT)
출원인 / 주소	United Technologies Corporation (Stratford CT 02)
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

An active noise control (ANC) system for a helicopter that is operative to effectively nullify one or more high frequency vibrations emanating from the main transmission gearbox thereof at the gearbox/airframe interface, thereby significantly reducing the interior noise levels of the helicopter, that is design optimized to minimize the number of actuators required, and that is design optimized to minimize contamination forces arising from operation of the system actuators. The ANC system includes modified transmission beams that are mechanically stiffened to function as rigid bodies with respect to the one or more of the high frequency vibrations, a plurality of actuators disposed in combination with the modified transmission beams, a plurality of sensors disposed in combination with the modified transmission beams in a collinear, spaced apart functional correlation with respective actuators, and controllers interconnecting individual actuators with respective functionally correlated sensors.

대표청구항 ▼

An active noise control system for a helicopter for effectively nullifying high frequency vibrations emanating from the main transmission gearbox thereof to significantly reduce interior noise levels of the helicopter, comprising: modified transmission beam means including mounting hardpoints for interfacing the main transmission gearbox in combination with the airframe of the helicopter, said modified transmission beam means being mechanically stiffened with respect to at least one of the high frequency vibrations emanating from the main transmission gearbox wherein said modified transmission beam means function as a rigid body with respect to said at least one high frequency vibration; actuator means mounted in combination with said modified transmission beam means adjacent said transmission gearbox and airframe interface for generating a plurality of single dimensional counterforces having a frequency, magnitude, and phase to effectively nullify said at least one high frequency vibration at said transmission gearbox and airframe interface; and means operative with respect to said at least one high frequency vibration to detect magnitudes and frequencies of single dimensional components thereof at said transmission gearbox and airframe interface and to provide command signals to control operation of said actuator means to generate said single dimensional counterforces having said frequency, magnitude, and phase to effectively nullify said at least one high frequency vibration at said transmission gearbox and airframe interface wherein the interior noise levels of the helicopter are significantly reduced.

이 특허를 인용한 특허 (51) 인용/피인용 타임라인 분석

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Dino J. Rossetti ; Mark A. Norris ; Guy D. Billoud, Active vibration control system for helicopter with improved actustor placement.
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Altieri, Russell E.; Jolly, Mark R., Computer system and program product for controlling vibrations.
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Fursdon, Peter Michael Trewhella, Controlling vibrations.
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Jolly, Mark R.; Badre-Alam, Askari; Altieri, Russell E.; Meyers, Andrew D., Distributed active vibration control systems and rotary wing aircraft with suppressed vibrations.
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Jolly, Mark R.; Badre-Alam, Askari; Altieri, Russell E.; Meyers, Andrew D., Distributed active vibration control systems and rotary wing aircraft with suppressed vibrations.
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Welsh, William A., Dual frequency hub mounted vibration suppressor system.
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Welsh, William A., Dual frequency hub mounted vibration suppressor system.
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Ivers Douglas E., Efficient multi-directional active vibration absorber assembly.
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Swanson Douglas A. ; Jones Peter J. ; Ivers Douglas E. ; Cooney Kevin C., Fluid-filled active vibration absorber.
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Schramm, Simon; Sihler, Christof; Hemmelmann, Jan; Roesner, Robert, Gearbox noise reduction by electrical drive control.
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Jolly, Mark R.; Black, Paul, Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations.
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Jolly, Mark R.; Meyers, Andrew D.; Mellinger, Daniel; Ivers, Douglas E.; Badre-Alam, Askari; Swanson, Douglas A.; Altieri, Russell E., Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations.
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Jolly, Mark R.; Altieri, Russell E.; Badre-Alam, Askari; Ivers, Douglas E.; Swanson, Doug A.; Mellinger, Daniel; Meyers, Andrew D., Helicopter vibration control system and circular force generation systems for canceling vibrations.
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Jolly, Mark R.; Meyers, Andrew D.; Mellinger, Daniel; Ivers, Douglas E.; Badre-Alam, Askari; Swanson, Douglas A.; Altieri, Russell E., Helicopter vibration control system and circular force generation systems for canceling vibrations.
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Jolly, Mark; Hildebrand, Stephen; Altieri, Russell; Ferguson, Matthew; Ivers, Douglas, Helicopter vibration control system and rotary force generator for canceling vibrations.
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Jolly, Mark R.; Meyers, Andrew D., Helicopter vibration control system and rotating assembly rotary forces generators for canceling vibrations.
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Welsh, William Arthur, High output force actuator for an active vibration control system.
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Terpay, Gregory Weston; Ernst, Ronald G., Hydraulic actuator.
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Drost,Stuart K., Lightweight structural damping assembly.
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Manende Lawrence ; Herkimer Robert N., Main rotor pylon support structure.
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Whiteford Gerald P., Multi-directional tuned vibration absorber.
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Vande Haar Evan R., Multiple direction vibration absorber.
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Antonios N. Kotoulas ; Charles Berezin ; Michael S. Torok ; Peter F. Lorber, Neural net controller for noise and vibration reduction.
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Kotoulas, Antonios N.; Berezin, Charles; Torok, Michael S.; Lorber, Peter F., Neural net controller for noise and vibration reduction.
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Lee, Taeoh; Heverly, II, David E.; Hendricks, Matthew W.; Griffin, Maurice; Smith, Michael R., Rotorcraft vibration suppression system in a four corner pylon mount configuration.
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Kashani Reza ; Naastad David, System and method for actively damping boom noise.
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Kashani,Reza, System and method for actively damping boom noise in a vibro-acoustic enclosure.
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Welsh, William A., System for active noise reduction.
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Toni, Darryl Mark; Kassapoglou, Christos; Sauer, Jeffrey George; Hornbaker, Darrel Duane, Transmission support structure for a rotary wing aircraft.
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Rossetti Dino J. ; Hildebrand Stephen F. ; Quinn John J. ; Norris Mark A. ; Miller Lane R., Vibration control apparatus and method for calender rolls and the like.
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Owen Archibald ; Korn Jonathan ; Remington Paul, Vibration reduction system using impedance regulated active mounts and method for reducing vibration.
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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Helicopter active noise control system 원문보기