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특허 상세정보

Active control of multi-element rotor blade airfoils

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-027/615   
미국특허분류(USC) 416/001; 416/024; 416/098
출원번호 US-0147558 (2002-05-17)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Carlson, Gaskey & Olds
인용정보 피인용 횟수 : 17  인용 특허 : 17
초록

A multi-element rotor blade includes a main element and an active slat movable relative to the main element. The slat rotates and translates relative to the main element from a base position. The base position provides a compromise between minimum coefficient of drag C D and maximum coefficient of lift C Lmax . In the advancing blade, since the airspeed thereof is significantly greater than the retreating blade, the slat is positively rotated from the base position to minimizes drag at low angles of attack. In the retreating blade, since the airspeed t...

대표
청구항

1. A multi-element rotor blade for an aircraft comprising:a main element rotatable about an axis of rotation to define an azimuth angle, said azimuth angle comprising an advancing angle between 0 and 180 degrees and a retreating angle between 180 and 360 degrees; said main element receives a pitch input adjacent a blade root portion; anda slat movable relative to said main element, said slat movable between a first position during said advancing angle and a second position during said retreating angle. 2. The multi-element rotor blade as recited in claim...

이 특허에 인용된 특허 (17)

  1. Kohlhepp Fred W.. Actuation system for an active rotor control system. USP2001036200096.
  2. Jaenker Peter,DEX. Airfoil member with a piezoelectrically actuated servo-flap. USP2001056231013.
  3. Gantt Michael A. (Granby CT) Larson John A. (New Hartford CT). Bearing having multi-sided inner ring bore with elastomeric rings. USP1996015482383.
  4. Hudson James H.. Compressor thrust bearings. USP1998045741116.
  5. Gwinn James T.. Elastomeric bearing. USP2001056224047.
  6. Redinger W. Scott. Elastomeric bearing and assembly method therefor. USP1999065915842.
  7. Hofmann Manfred (Hunfelden DEX). Engine mount with controllable rigidity. USP1997105681032.
  8. Aoki Makoto,JPX ; Nishimura Hiroki,JPX ; Yamakawa Eiichi,JPX. Helicopter blade aerofoil. USP1999105961290.
  9. Domzalski David B. ; Straub Friedrich K. ; Kennedy Dennis K.. Helicopter rotor blade flap actuator government interest. USP2000106135713.
  10. Bauer Karl,DEX. Helicopter rotor blade with a movable flap. USP2001016168379.
  11. Gunsallus Clifford T. (North Canton CT). Helicopter with leading edge servo flaps for pitch positioning its rotor blades. USP1995045409183.
  12. Bruehl Herbert,DEX. Hydraulically damping elastomer bearing. USP2001016168144.
  13. Moses Charles J. ; Hogan Michael E.. Load and deflection measurement system for elastomeric bearings. USP1999055905212.
  14. Kondo Natsuki,JPX ; Tsujiuchi Tomoka,JPX ; Yamakawa Eiichi,JPX. Rotor blade for rotary wing aircraft. USP2001056231308.
  15. Yamakawa Eiichi,JPX ; Murashige Atsushi,JPX ; Tsujiuchi Tomoka,JPX. Rotor blade for rotorcraft. USP2001026190132.
  16. Hobdy Miles A.. Turret bearing structure for vessels. USP1999015860382.
  17. Aoki Makoto,JPX ; Nishimura Hiroki,JPX ; Yamakawa Eiichi,JPX. helicopter blade aerofoil. USP1999095957662.

이 특허를 인용한 특허 피인용횟수: 17

  1. Chaudhry, Zaffir; Wake, Brian E.; Sun, Fanping; Bedwell, Richard Jeremy; Yeh, Jimmy Lin-Min; Hoffman, Lee A.. Brushless direct current (BLDC) motor based linear or rotary actuator for helicopter rotor control. USP2014128915710.
  2. Altieri, Russell E.; Jolly, Mark R.. Computer system and program product for controlling vibrations. USP2010057722322.
  3. Altieri, Russell E.; Jolly, Mark R.. Computer system and program product for controlling vibrations. USP2013078480364.
  4. Jolly, Mark R.; Badre-Alam, Askari; Altieri, Russell E.; Meyers, Andrew D.. Distributed active vibration control systems and rotary wing aircraft with suppressed vibrations. USP2014018639399.
  5. Jolly, Mark R.; Badre-Alam, Askari; Altieri, Russell E.; Meyers, Andrew D.. Distributed active vibration control systems and rotary wing aircraft with suppressed vibrations. USP2012018090482.
  6. Jolly, Mark R.; Black, Paul. Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations. USP2012098267652.
  7. 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. USP2012048162606.
  8. 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. USP2017109776712.
  9. 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. USP2015079073627.
  10. Jolly, Mark; Hildebrand, Stephen; Altieri, Russell; Ferguson, Matthew; Ivers, Douglas. Helicopter vibration control system and rotary force generator for canceling vibrations. USP2012118313296.
  11. Jolly,Mark; Hildebrand,Stephen; Altieri,Russell; Ferguson,Matthew; Ivers,Douglas. Helicopter vibration control system and rotary force generator for canceling vibrations. USP2008117448854.
  12. Jolly, Mark R.; Meyers, Andrew D.. Helicopter vibration control system and rotating assembly rotary forces generators for canceling vibrations. USP2013058435002.
  13. Egedal, Per. Method for controlling wind turbines, and devices therefore. USP2012048154139.
  14. Hein, Benjamin Reed. Multi-element rotor blade. USP2015129211950.
  15. Robertson, Daniel B.; Smith, Dudley E.; Hollimon, Charles L.; Narramore, Jimmy C.; Mullins, Robert B.. Proprotor blade with leading edge slot. USP2009097594625.
  16. Sane, Harshad S.; Driscoll, Joseph T.; Cherepinsky, Igor. Rotorcraft flight parameter estimation. USP2016119506945.
  17. Schmaling, David N.; D'Anna, Frank P.. Stiff inplane elastomeric rotorhead. USP2017049616996.