[특허]Spacecraft East/West orbit control during a North or South stationkeeping maneuver

[미국특허] Spacecraft East/West orbit control during a North or South stationkeeping maneuver 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64G-001/26 G06F-015/50
출원번호	US-0994769 (1992-12-22)
발명자 / 주소	Kazimi Fatima (San Carlos CA) White Lisa K. (Menlo Park CA) Plescia Carl T. (Sunnyvale CA)
출원인 / 주소	Space Systems/Loral, Inc. (Palo Alto CA 02)
인용정보	피인용 횟수 : 23 인용 특허 : 0

초록 ▼

A 3-axis stabilized spacecraft has primary and secondary attitude control thruster strings, thrusters in each string exerting roll, pitch and yaw torques. The primary and secondary thruster strings are similar and exhibit paired thrusters oriented on opposite sides of an East/West axis passing through the spacecraft. A stationkeeping input energizes the North or South thrusters to cause a maneuver of the spacecraft along a North/South axis, the thrusters effecting a perturbation in the spacecraft\s attitude. An attitude control system energizes at least a primary string thruster to counteract the attitude perturbation, the thruster being oriented so as also to cause a change in the spacecraft\s East/West orbit velocity. A processor is responsive to the change in East/West orbit velocity reaching a deadband limit value to deactivate the primary string thruster and to activate the secondary string thruster which exhibits a similar torque effect on the spacecraft as the primary string thruster but is oriented so as to cause an oppositely directed change in the spacecraft\s East/West orbit velocity. The spacecraft further includes a system for enabling all primary and secondary thrusters that exert a force in one direction (i.e. East or West) for attitude control during limit cycling and during the North or South stationkeeping maneuver. The like directed thrusters both provide attitude stabilization and cause a predetermined change in orbit velocity.

대표청구항 ▼

A spacecraft having primary and secondary, three axis attitude control thruster strings, thrusters in each string producing roll, pitch and yaw torques, said primary and secondary thruster strings exhibiting thrusters oriented on opposite sides of an East/West axis passing through said spacecraft, said spacecraft further comprising: means for energizing North or South thrusters in a said thruster string to cause a maneuver along a North or South axis, said thrusters effecting an attitude perturbation of said spacecraft; means for establishing an East/West deadband range of orbit velocity values, said deadband range having limit values; attitude control means for energizing at least a primary string thruster to counteract said attitude perturbation, said primary string thruster being oriented so as to cause a change in said orbit velocity in a first direction along said East/West axis; means for determining changes in orbit velocity; and means responsive to a said change in orbit velocity reaching a limit value, to deactivate said primary string thruster and to activate a secondary string thruster exhibiting a substantially similar torque effect on said spacecraft as said deactivated primary string thruster, but being oriented so as to cause an oppositely directed change in said orbit velocity along said East/West axis.

이 특허를 인용한 특허 (23) 인용/피인용 타임라인 분석

Weigl, Harald J.; Goodzeit, Neil E.; Ratan, Santosh, Attitude determination system for yaw-steering spacecraft.
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Price Xen ; Chan Kam, Autonomous solar torque management.
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Price Xen ; Chan Kam ; Stoen Jeffery, Autonomous spacecraft payload base motion estimation and correction.
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Keith Reckdahl ; Birgit Sauer, Closed-loop spacecraft orbit control.
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John S. Higham ; Keith Reckdahl, Controller and control method for satellite orbit-keeping maneuvers.
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Goodzeit Neil Evan, Delta-V targeting system for three-axis controlled spacecraft.
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Fenske Allen J. ; Gelderloos Hendrik C., Dual fault tolerant actuator control system.
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Goodzeit,Neil Evan; Lempke,James Donald, Efficient orbit sparing system for space vehicle constellations.
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Goodzeit, Neil Evan, Fault tolerant attitude control system for zero momentum spacecraft.
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Burgess,Jeffrey S., Geostationary stationkeeping method.
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Glogowski, Michael Joseph; Goodzeit, Neil Evan, Gimbaled ion thruster arrangement for high efficiency stationkeeping.
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Peterson, Glenn E., Method and system for controlling the eccentricity of a near-circular orbit.
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Stoen Jeffery D ; Chan Kam, Method to reorient a spacecraft using only initial single axis attitude knowledge.
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Stoen Jeffery D ; Chan Kam, Method to reorient a spacecraft using only initial single axis attitude knowledge.
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Liu Tung Y ; Chan Kam K, Method using double thruster firings to deadbeat flexible solar array structural oscillations.
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Stange, Kent, Methods and systems for translating an emergency system alert signal to an automated flight system maneuver.
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Keitel Keith F. ; Noyola Richard A. ; Yocum ; Jr. John F. ; Abernethy David K. ; Anzel Bernard M., Momentum unloading using gimbaled thrusters.
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Kamel Ahmed A ; Ong Kwok M, Satellite camera attitude determination and image navigation by means of earth edge and landmark measurement.
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Woo, Byoungsam; Ganji, Farid; Cooper, John Hutton, Spacecraft momentum unload and station-keeping techniques.
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Hubert Carl Henry, Spacecraft thruster operation for improved orbital maneuver accuracy.
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Goodzeit, Neil E., System for geosynchronous spacecraft rapid earth reacquisition.
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Goodzeit, Neil E.; Weigl, Harald J., System for on-orbit correction of spacecraft payload pointing errors.
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Munir, Mohammad Saghir; Gelon, Walter; Stratemeier, Darren, Thruster support mechanism for satellite propulsion.
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IPC	Description
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] Spacecraft East/West orbit control during a North or South stationkeeping maneuver 원문보기