Think I'm gonna call it for now. May reassess, but almost completely done!

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Connor
2022-03-14 01:09:52 -06:00
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\abstract{ \OnePageChapter
There are a variety of approaches to finding and optimizing low-thrust trajectories in
interplanetary space. This thesis analyzes one such approach, namely the application of a
Monotonic Basin Hopping (MBH) algorithm to a series of Sims-Flanagan transcribed trajectory arcs
and its applications in a multiple-shooting non-linear solver for the purpose of finding valid
low-thrust trajectories between planets given poor initial conditions. These valid arcs are then
fed into the MBH algorithm, which combines them in order to find and optimize interplanetary
trajectories, given a set of flyby planets. This allows for a fairly rapid searching of a very
large solution space of low-thrust profiles via a medium fidelity inner-loop solver and a
well-suited optimization routine. The trajectories found by this method can then be optimized
further by feeding the solutions back, once again, into the non-linear solver, this time
allowing the solver to perform optimization.
Much work has been performed recently to utilize the increasingly viable technology of
low-thrust electric propulsion systems on missions of interplanetary scope. This thesis analyzes
a technique for the initial analysis of feasibility of utilizing a combination of low-thrust
propulsion systems and natural gravity flybys for missions to the outer planets. First, a method
for finding local optima by utilizing an interior-point linesearch algorithm to directly
optimize the entire trajectory as a Non-Linear Programming problem is presented. Then, a
Monotonic Basin Hopping algorithm is utilized to traverse the search space, improve the local
optima determined by the internal optimizer, and determine the global optima. This allows for a
medium-fidelity, fully automated global optimization of the low thrust controls and flyby
parameters for a given mission objective.
}
\dedication[Dedication]{
Dedicated to some people.
\begin{center}
I'd like to dedicate this work to anyone with an interest in space.
We're all exploring this together.
\end{center}
}
\acknowledgements{ \OnePageChapter
This will be an acknowledgement.
I owe just about everything that I am today to the circumstances that I grew up in and in no
area of my life is that more apparent than in my loving family. I'd like to thank them for
providing me with the emotional support I needed to grow confident in my own abilities and the
logistical support I needed to nurture my curiosities.
I'd also like to thank my girlfriend, Rachael, for supporting me through this process. This has
not been an easy time for me, and I owe a lot to your support this past year.
Finally, I'd like to give a huge thanks to Dr. Bosanac, who provided me with the structure I
needed to stay on track, the motivation I needed to really get the most out of this paper, and
the guidance I needed to finish this up. It's no exxageration to say that this thesis wouldn't be
written to anywhere near the level of quality it was without you.
}
\emptyLoT
@@ -58,6 +72,8 @@
\input LaTeX/results.tex
\input LaTeX/conclusion.tex
\bibliographystyle{plain}
\nocite{*}
\bibliography{thesis}