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Optimal Lunar Landing Trajectory Design for Hybrid Engine
Joint Authors
Kim, Donghoon
Leeghim, Henzeh
Cho, Dong-Hyun
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-06-14
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The lunar landing stage is usually divided into two parts: deorbit burn and powered descent phases.
The optimal lunar landing problem is likely to be transformed to the trajectory design problem on the powered descent phase by using continuous thrusters.
The optimal lunar landing trajectories in general have variety in shape, and the lunar lander frequently increases its altitude at the initial time to obtain enough time to reduce the horizontal velocity.
Due to the increment in the altitude, the lunar lander requires more fuel for lunar landing missions.
In this work, a hybrid engine for the lunar landing mission is introduced, and an optimal lunar landing strategy for the hybrid engine is suggested.
For this approach, it is assumed that the lunar lander retrofired the impulsive thruster to reduce the horizontal velocity rapidly at the initiated time on the powered descent phase.
Then, the lunar lander reduced the total velocity and altitude for the lunar landing by using the continuous thruster.
In contradistinction to other formal optimal lunar landing problems, the initial horizontal velocity and mass are not fixed at the start time.
The initial free optimal control theory is applied, and the optimal initial value and lunar landing trajectory are obtained by simulation studies.
American Psychological Association (APA)
Cho, Dong-Hyun& Kim, Donghoon& Leeghim, Henzeh. 2015. Optimal Lunar Landing Trajectory Design for Hybrid Engine. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1073886
Modern Language Association (MLA)
Cho, Dong-Hyun…[et al.]. Optimal Lunar Landing Trajectory Design for Hybrid Engine. Mathematical Problems in Engineering No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1073886
American Medical Association (AMA)
Cho, Dong-Hyun& Kim, Donghoon& Leeghim, Henzeh. Optimal Lunar Landing Trajectory Design for Hybrid Engine. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1073886
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1073886