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특허 상세정보

Blade vortex interaction noise reduction techniques for a rotorcraft

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01D-005/00   
미국특허분류(USC) 416/024 ; 244/017.13
출원번호 US-0662601 (1996-06-13)
발명자 / 주소
출원인 / 주소
대리인 / 주소
인용정보 피인용 횟수 : 17  인용 특허 : 6

An active control device for reducing blade-vortex interactions (BVI) noise generated by a rotorcraft, such as a helicopter, comprises a trailing edge flap located near the tip of each of the rotorcraft's rotor blades. The flap may be actuated in any conventional way, and is scheduled to be actuated to a deflected position during rotation of the rotor blade through predetermined regions of the rotor azimuth, and is further scheduled to be actuated to a retracted position through the remaining regions of the rotor azimuth. Through the careful azimuth-depe...


[ What is claimed is:] [1.] An active control device for reducing blade vortex-interaction (BVI) noise generated by a rotorcraft having a rotor blade including a tip end, a root end, a leading edge, and a trailing edge, said rotor blade being attached at said root end to a rotor hub on said rotorcraft and extending radially outwardly therefrom, having a radius R and a chord C, such that when said rotor hub is rotatably driven, said rotor blade rotates about said hub through a 360 degree azimuth, said active control device comprising:a movable flap pivota...

이 특허를 인용한 특허 피인용횟수: 17

  1. Matalanis, Claude G.; Wake, Brian E.. Active rotor blade control effector system for a rotary-wing aircraft. USP2013128596974.
  2. Kohlhepp Fred W.. Actuation system for an active rotor control system. USP2001036200096.
  3. Ferrer Rogelio,FRX. Device and process for reducing the vibration generated on the structure of a rotary-wing aircraft, particularly a helicopter. USP2001116311924.
  4. Loftus, Robert T.; McNulty, Michael J.. Field installable and removable helicopter rotor blade vibration and blade tracking device. USP2012068192162.
  5. Beckman, Brian C.; Ko, Allan. Geometrically reconfigurable propellers. USP2017039592910.
  6. Scott, Mark W.; Gatto, Stephen M.. High speed compound rotary wing aircraft. USP2015099120567.
  7. Lozyniak Steven A. ; Lorber Peter Frederick ; Kohlhepp Fred W. ; Hoffman Lee A. ; Morton Robert ; Ferraro Richard B.. High torque actuation system for an active rotor control system. USP2001036196796.
  8. Betzina, Mark D.; Nguyen, Khanh Q.. Method and system for active noise control of tiltrotor aircraft. USP2003126671590.
  9. Scott, Mark W.. Mission adaptive rotor blade. USP2016119505492.
  10. Antonios N. Kotoulas ; Charles Berezin ; Michael S. Torok ; Peter F. Lorber. Neural net controller for noise and vibration reduction. USP2002126493689.
  11. Kotoulas, Antonios N.; Berezin, Charles; Torok, Michael S.; Lorber, Peter F.. Neural net controller for noise and vibration reduction. USP2004066751602.
  12. William Edward Vanderbeck ; Gregory Weston Terpay ; Ka-Shu Lee ; George Gustave Zipfel ; Victor G. Mishkevich ; Thomas Edward Smith, Jr.. Permanent magnet phase-control motor. USP2002116476534.
  13. Beckman, Brian C.; Ko, Allan. Reconfiguring propellers during aerial vehicle operation. USP20190110179646.
  14. Toulmay, Fran.cedilla.ois. Rotary wing aircraft with electric pitch control. USP2003036530542.
  15. Daniel A. Wachspress ; Todd R. Quackenbush. Rotor blade with optimized twist distribution. USP2002126497385.
  16. Michael S. Torok ; William A. Welsh ; George Gustave Zipfel, Jr. ; Gregory Weston Terpay ; Ka-Shu Lee ; William Edward Vanderbeck. Rotor hub mounted actuator for controlling a blade on a rotorcraft. USP2002036354536.
  17. Lorber Peter F.. Technique for providing a signal for controlling blade vortex interaction noise of a rotorcraft. USP2001016171056.