83 lines
3.0 KiB
TeX
83 lines
3.0 KiB
TeX
\documentclass[defaultstyle,11pt]{LaTeX/thesis}
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\usepackage{graphicx}
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\usepackage{amssymb}
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\usepackage{hyperref}
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\usepackage{amsmath}
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\usepackage{amsfonts}
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\usepackage{float}
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\usepackage{xfrac}
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\title{Designing Optimal Low-Thrust Interplanetary Trajectories Utilizing Monotonic Basin Hopping}
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\author{Richard C.}{Johnstone}
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\otherdegrees{B.S., Unviersity of Kentucky, Mechanical Engineering, 2016 \\
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B.S., University of Kentucky, Physics, 2016}
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\degree{Master of Science}{M.S., Aerospace Engineering}
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\dept{Department of}{Aerospace Engineering}
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\advisor{Prof.}{Natasha Bosanac}
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\reader{Kathryn Davis}
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\readerThree{Daniel Scheeres}
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\abstract{ \OnePageChapter
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Much work has been performed recently to utilize the increasingly viable technology of
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low-thrust electric propulsion systems on missions of interplanetary scope. This thesis analyzes
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a technique for designing trajectories for spacecraft with a low-thrust propulsion system that
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also use natural gravity flybys for missions to the outer planets. Often, the goal is to find
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feasible solutions that also minimize propellant mass requirements. First, locally optimal
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solutions are constructed by using an interior-point linesearch algorithm, along with multiple
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shooting techniques for optimization. Then, Monotonic Basin Hopping is utilized to traverse the
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search space, improve the local optima determined by the internal optimizer, and determine the
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global optima. This approach allows for a medium-fidelity, fully automated global optimization
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of the low thrust controls and flyby parameters for a given target destination. As an
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application of this method, two sample trajectories to Saturn are analyzed.
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}
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\dedication[Dedication]{
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\begin{center}
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I'd like to dedicate this work to anyone with an interest in space.
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We're all exploring this together.
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\end{center}
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}
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\acknowledgements{ \OnePageChapter
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I owe just about everything that I am today to the circumstances that I grew up in and in no
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area of my life is that more apparent than in my loving family. I'd like to thank them for
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providing me with the emotional support I needed to grow confident in my own abilities and the
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logistical support I needed to nurture my curiosities.
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I'd also like to thank my girlfriend, Rachael, for supporting me through this process. This has
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not been an easy time for me, and I owe a lot to your support this past year.
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Finally, I'd like to give a huge thanks to Dr. Bosanac, who provided me with the structure I
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needed to stay on track, the motivation I needed to really get the most out of this paper, and
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the guidance I needed to finish this up. It's no exxageration to say that this thesis wouldn't be
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written to anywhere near the level of quality it was without you.
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}
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\emptyLoT
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\begin{document}
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\input LaTeX/macros.tex
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\input LaTeX/introduction.tex
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\input LaTeX/trajectory_design.tex
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\input LaTeX/trajectory_optimization.tex
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\input LaTeX/approach.tex
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\input LaTeX/results.tex
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\input LaTeX/conclusion.tex
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\bibliographystyle{plain}
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\nocite{*}
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\bibliography{LaTeX/thesis}
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\end{document}
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