Hybrid control trajectory optimization for air-breathing hypersonic vehicle = 공기 흡입식 극초음속 비행체의 하이브리드 제어 기반 궤적 최적화 연구

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Trajectory optimization problem for hypersonic vehicle is addressed in this thesis. The engine of hypersonic vehicle is assumed as a dual-mode scramjet engine which can be operated as a ramjet and scramjet for wide range of flight Mach number. Boost-skipping trajectory was proposed for maximization of hypersonic vehicle, and based on this trajectory, flight mode of dual-mode scramjet is divided into three modes: ram mode, scram mode, zero thrust mode. Hypersonic vehicle was modelled with consideration of changes of physical quantities over mode transition. To deal with discrete mode changes as well as continuous control, hybrid optimal control method is applied to this problem. Simulation results demonstrate that the optimized trajectory with hybrid control has better performance compared to rule-based mode transition trajectory. Also, a vehicle which imitates the characteristics of dual-mode scramjet vehicle is implemented to optimized the trajectory. The results suggest that the hybrid optimal control can be applied to the trajectory optimization of a dual-mode scramjet vehicle considering the mode transition.
Advisors
Choi, Han-limresearcher최한림researcher
Description
한국과학기술원 :항공우주공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 항공우주공학과, 2019.2,[iv, 40 p. :]

Keywords

Air-breathing engine▼ahypersonic vehicle▼atrajectory optimization▼ahybrid control▼adual-mode scramjet; 공기 흡입식 엔진▼a극초음속 비행체▼a궤적 최적화▼a하이브리드 제어▼a이중 모드 스크램젯

URI
http://hdl.handle.net/10203/267313
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843688&flag=dissertation
Appears in Collection
AE-Theses_Master(석사논문)
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