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특허 상세정보

Active acoustic liner

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01D-025/04   
미국특허분류(USC) 415/119 ; 60/725 ; 181/206 ; 244/1N
출원번호 US-0340091 (1994-11-14)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 30  인용 특허 : 0
초록

An active liner for attenuating noise includes a rigid backplate supporting a piezoelectric panel. A pressure transducer is disposed in the panel for sensing acoustic pressure of noise being propagated against a face surface of the panel. A controller includes a predetermined schedule of acoustic impedance for controlling a displacement driver joined to the panel to effect a displacement velocity of the panel face surface for obtaining a predetermined acoustic impedance at the sensed acoustic pressure for attenuating noise.

대표
청구항

An active liner for attenuating noise comprising: a rigid backplate; a piezoelectric panel having a back surface fixedly joined to said backplate, and an opposite face surface for directly facing said noise; a pressure transducer disposed in said panel for sensing acoustic pressure of said noise being propagated against said panel face surface; means for electrically driving said panel to effect piezoelectric displacement thereof in a direction normal to said panel face surface; and means operatively joined to said pressure transducer and said driving me...

이 특허를 인용한 특허 피인용횟수: 30

  1. Kempton,Andrew J; Baker,Nicholas J; McAlpine,Alan; Astley,Jeremy. Acoustic liner for gas turbine engine. USP2006107124856.
  2. Kray, Nicholas Joseph; McDonald, Seth Alexander; Roby, Benjamin. Acoustic panel and method of forming. USP2014078763753.
  3. Drzewiecki Tadeusz M. (Rockville MD) Niemczuk John B. (Kensington MD) Fuller Christopher R. (Norfolk VA) Thomas Russell H. (Hampton VA) Burdisso Ricardo A. (Blacksburg VA). Acousto-fluidic driver for active control of turbofan engine noise. USP1997095662136.
  4. Andersson Anders O. (Seattle WA). Active control of tone noise in engine ducts. USP1997125692702.
  5. Mathur Gopal P.. Active noise control using blocked mode approach. USP2000026031917.
  6. Patrick William P.. Active noise control using phased-array active resonators. USP1998075778081.
  7. Carme,Christian; Delemotte,Virginie; Chaffois,Pierre; Damizet,Patrick. Active sound attenuation device to be arranged inside a duct, particularly for the sound insulation of a ventilating and/or air conditioning system. USP2007077248704.
  8. Kraft Robert E. (Cincinnati OH) Syed Asif A. (Loveland OH). Actively controlled acoustic treatment panel. USP1997125702230.
  9. Gandhi, Umesh N.. Adjustable sound panel with electroactive actuators. USP2010047705522.
  10. Boulet, Nicolas; Affortit, Sébastien. Air inlet for aircraft propulsion unit having a structure resistant to excess pressure and a process for repairing an air inlet of an aircraft propulsion unit. USP2015069061769.
  11. Reba, Ramons A.; Morin, Bruce L.; Morford, Stephen A.; Lord, Wesley K.. Airfoil acoustic impedance control. USP2009107607287.
  12. von Flotow Andreas H. ; Mercadal Mathieu ; Tappert Peter M.. Apparatus and method for active control of sound transmission through aircraft fuselage walls. USP2000066078673.
  13. Todorovic, Predrag; Kubisch, Thomas. Engine casing of an aircraft gas turbine having sound-absorbing elements in the fan inflow region. USP2016069371778.
  14. Olsen,Ronald F.; Breer,Marlin D.. Flow restrictors for aircraft inlet acoustic treatments, and associated systems and methods. USP2008027331421.
  15. Topol, David A.; Prasad, Dilip. Gas turbine blade array with reduced acoustic output. USP20190310233948.
  16. Rice Edward J. ; Walker Bruce E. ; Hersh Alan S.. Hybrid mode-scattering/sound-absorbing segmented liner system and method. USP1999115979593.
  17. Breer, Marlin D.; Olsen, Ronald F.; Kunze, Jr., Robert K.; Riedel, Brian L.. Method and apparatus for aircraft inlet ice protection. USP2004026688558.
  18. Marlin D. Breer ; Ronald F. Olsen ; Robert K. Kunze, Jr. ; Brian L. Riedel. Method and apparatus for aircraft inlet ice protection. USP2002046371411.
  19. Marlin D. Breer ; Ronald F. Olsen ; Robert K. Kunze, Jr. ; Brian L. Riedel. Method and apparatus for aircraft inlet ice protection. USP2002106457676.
  20. Shah, Anil D.; Gupta, Alankar. Method and apparatus for detecting conditions conducive to ice formation. USP2009127628359.
  21. Shah,Anil D.; Gupta,Alankar. Method and apparatus for detecting conditions conducive to ice formation. USP2007027175136.
  22. Friddell,Stephen D.; Prichard,Alan K.. Method and apparatus for liquid containment, such as for aircraft fuel vessels. USP2006087090167.
  23. Jones, Kennie H; Nark, Douglas M.; Jones, Michael G.; Parrott, Tony L.; Lodding, Kenneth N.. Method of adjusting acoustic impedances for impedance-tunable acoustic segments. USP2012028111832.
  24. Atassi, Oliver V.. Nacelle with porous surfaces. USP2015038974177.
  25. Van Nostrand William C. ; Parente Charles A. ; Arcas Noe. Noise absorption system having active acoustic liner. USP1999075919029.
  26. Hosny,Diaa; Ahmad,Samir S.. Noise control. USP2006067059820.
  27. Mark Joseph Steven. Passenger compartment noise attenuation apparatus for use in a motor vehicle. USP1998095812684.
  28. Porte, Alain. Process for de-icing by forced circulation of a fluid, an air intake cowling of a reaction motor and device for practicing the same. USP2004036698691.
  29. Nye Theodore W. ; Baker Jeffrey L.. Structure having low acoustically-induced vibration response. USP1999065912442.
  30. Todd, Kevin B.; Patton, Mark E.. Tensioner with vibrational damping. USP2003086609985.