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"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"

특허 상세정보

Method using double thruster firings to deadbeat flexible solar array structural oscillations

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64G-001/26   
미국특허분류(USC) 244/169 ; 244/164 ; 244/172 ; 244/173
출원번호 US-0998173 (1997-12-24)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Perman & Green, LLP
인용정보 피인용 횟수 : 7  인용 특허 : 20
초록

A spacecraft includes a plurality of thrusters mounted at predetermined locations on a spacecraft structure, individual ones the plurality of thrusters being fired for generating a torque about a desired axis. The firing of a thruster is partitioned into two firings that are offset in time by an amount .DELTA.t, wherein .DELTA.t=(1/2).times.(1/F).times.SF, where F is a dominant modal frequency, in Hertz, for any particular axis (nominally the 1st mode) of the spacecraft structure, and where SF is a scale factor that is adjustable about the frequency. In ...

대표
청구항

[ What is claimed is:] [1.] A spacecraft comprising a plurality of low thrust thrusters mounted at predetermined locations on a spacecraft structure, said plurality of low thrust thrusters being fired in pairs for generating a desired torque, where the firing of a low thrust thruster pair is partitioned into two firings that are offset in time by an amount .DELTA.t, wherein EQU .DELTA.t=(1/2).times.(1/F).times.SF, re F is a dominant modal frequency, in Hertz, for any particular axis (nominally the 1st mode) of the spacecraft structure, and where SF is a ...

이 특허에 인용된 특허 (20)

  1. Goodzeit Neil Evan ; Ratan Santosh. Adaptive harmonic disturbance compensation system. USP1998095806804.
  2. Chan Fred N. (Atherton CA) Reimche Wallace E. (Saratoga CA). Autonomous stationkeeping for three-axis stabilized spacecraft. USP1988084767084.
  3. Schmidt ; Jr. George E. (Vincentown NJ). Closed-loop magnetic roll/yaw control system for high inclination orbit satellites. USP1984124489383.
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  5. Adsit Rhys (Milpitas CA) Liu Tung (Union City CA) Chan Fred N. T. (Atherton CA) Weyandt ; Jr. Charles J. (Yardley PA) Tilley Scott (Belmont CA) Bayloca Michel (Menlo Park CA). Control system and method for spacecraft attitude control. USP1995105459669.
  6. Chan Fred N. (Atherton CA) Nilsen Frank C. (Mountain View CA). Digital PWPF three axis spacecraft attitude control. USP1986074599697.
  7. Lehner John A. (Sunnyvale CA) Lebsock Kenneth L. (Manhattan Beach CA). Electronic on-orbit roll/yaw satellite control. USP1985064521855.
  8. Anzel Bernard M.. Method and apparatus for a satellite station keeping. USP1998095810295.
  9. Anzel Bernard M. (El Segundo CA). Method and apparatus for a satellite station keeping. USP1995085443231.
  10. Bender Douglas J. (Redondo Beach CA) Hummel William F. (Los Angeles CA). Method and apparatus for compensating for magnetic disturbance torques on a satellite. USP1996075540405.
  11. Blount Dale H. (Huntsville AL). Propulsion apparatus and method using boil-off gas from a cryogenic liquid. USP1986044585191.
  12. Muhlfelder ; Ludwig. Roll/yaw body steering for momentum biased spacecraft. USP1978044084772.
  13. Kazimi Fatima (San Carlos CA) White Lisa K. (Menlo Park CA) Plescia Carl T. (Sunnyvale CA). Spacecraft East/West orbit control during a North or South stationkeeping maneuver. USP1995035400252.
  14. Tilley Scott W. (Belmont CA) Liu Tung Y. (Union City CA) Higham John S. (Mountain View CA). Spacecraft attitude control and momentum unloading using gimballed and throttled thrusters. USP1994095349532.
  15. Garg Subhash C. (San Jose CA) Bhat Mahabaleshwar K. P. (San Jose CA). Spacecraft attitude control using coupled thrusters. USP1989074848706.
  16. Decanini Jorge H. (Long Beach CA). Spacecraft control by electrochromic devices. USP1994045305971.
  17. Clark John F. (Princeton NJ). Station-keeping using solar sailing. USP1988074759517.
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  19. Fowell Richard A. (Culver City CA). Two-axis attitude correction for orbit inclination. USP1993025184790.
  20. Hablani Hari B. (Westminster CA). Zero-residual-energy minimum-time slew of a flexible space structure with damping. USP1993115257802.