Design of control laws for trajectory correction maneuver on interplanetary mission = 행성간 임무에서의 궤적 보정 기동을 위한 제어 법칙 설계

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Design of the Trajectory Correction Maneuver(TCM) is needed for success of interplanetary missions. There are unexpected trajectory errors(many perturbations, initial launch vehicle error, and so on), the spacecraft can’t reach a designed aim point without correction maneuver. Trajectory is occasionally corrected by low thrust inputs. To provide robustness for variety of spacecraft maneuvers, we study about Formation Flying(FF). The principle of the trajectory correction maneuver is based upon a classical element feedback control using fixed low thrust for spacecraft orbital maneuvers. Then, we apply to TCM with consideration of time. Because formation flying is unable to make spacecraft reach up to an aimed point in the desired time. Flight time is very important factor for interplanetary missions. For calculation of perturbations and other forces, Gauss’s Variational Equations(GVEs) has been used. The stability of the system is proven with Lyapunov approach. Orbital elements are coupled each other so there are significant difficulty in selection of the control gains. In this research, we proposed an approach to select reasonable gains by trial and error. In this thesis, we can obtain sets of control gain which guarantees stability of the system by element feedback control. We apply to nominal trajectory(Earth to Mars transfer orbit) and the spacecraft reaches an aimed point on time, orbit elements converge to desired values.
Advisors
Bang, Hyo-choongresearcher방효충researcher
Description
한국과학기술원 : 항공우주공학전공,
Publisher
한국과학기술원
Issue Date
2008
Identifier
302024/325007  / 020063153
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 항공우주공학전공, 2008. 8., [ iv, 61 p ]

Keywords

Trajectory Correction maneuver; interplanetary mission; elements feedback control; Lambert`s theorem; Lyapunov stability; 궤적 보정 기동; 행성간 임무; 요소 되먹임 제어; 램버트 이론; 리아푸노브 안정성; Trajectory Correction maneuver; interplanetary mission; elements feedback control; Lambert`s theorem; Lyapunov stability; 궤적 보정 기동; 행성간 임무; 요소 되먹임 제어; 램버트 이론; 리아푸노브 안정성

URI
http://hdl.handle.net/10203/27036
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=302024&flag=dissertation
Appears in Collection
AE-Theses_Master(석사논문)
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