She did. Now I'm done!

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Connor
2022-03-15 22:20:45 -06:00
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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.
a technique for designing trajectories for spacecraft with a low-thrust propulsion system that
also use natural gravity flybys for missions to the outer planets. Often, the goal is to find
feasible solutions that also minimize propellant mass requirements. First, locally optimal
solutions are constructed by using an interior-point linesearch algorithm, along with multiple
shooting techniques for optimization. Then, Monotonic Basin Hopping is utilized to traverse the
search space, improve the local optima determined by the internal optimizer, and determine the
global optima. This approach allows for a medium-fidelity, fully automated global optimization
of the low thrust controls and flyby parameters for a given target destination. As an
application of this method, two sample trajectories to Saturn are analyzed.
}