자료유형  

 학위논문

Control Number  

0017204121

International Standard Book Number  

9798346390190

Dewey Decimal Classification Number  

629.1

Main Entry-Personal Name  

Blanchard, Jared Todd.

Publication, Distribution, etc. (Imprint  

[S.l.] : Stanford University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

175 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

General Note  

Advisor: Elschot, Sigrid.

Dissertation Note  

Thesis (Ph.D.)--Stanford University, 2024.

Summary, Etc.  

요약The search for extraterrestrial life is one of the great adventures of our time, and we may not need to look farther than our own solar system to find it. Scientists have identified several ocean worlds, mostly orbiting the outer planets, that have large subsurface oceans that could be hospitable to some form of life. Of these worlds, Europa and Enceladus have emerged as the most promising targets. Europa Clipper, a dedicated mission to orbit Europa, is scheduled for this year, and Enceladus is slated for a New Frontiers mission in the next decade.Designing trajectories to such deep-space targets requires balancing multiple objectives. Science objectives are limited by fuel and time constraints. Study of the Circular Restricted Three-Body Problem (CR3BP) has allowed mission designers to find very efficient trajectories that arrive in realistic time frames. Because of the non-linear nature of the CR3BP, mission design work relies on intelligently sampling state space and parsing through trajectories. Dynamical systems theory provides qualitative tools such as the Poincare map that make it easier to visualize the high-dimensional state space. Furthermore, periodic and quasi-periodic orbits add structure to the chaotic dynamics, and their hyperbolic invariant manifolds play a key role in the mission design process. In this work, we develop new methods that blend these tools and theories into novel methods that are of immediate utility in the field.We discovered a method for computing invariant funnels around non-periodic trajectories that approach the secondary body. Invariant funnels are sets of trajectories that converge in position space to a target point. We detail how to compute these funnels and demonstrate that they that can be used to reduce the control effort required by a spacecraft approaching the secondary body. We also describe the Swiss cheese plot, a Poincare map that facilitates the mapping of the resonant structure of a given system and can be used to identify resonant trajectories to targets near the secondary body. The work in this thesis led to two New Technology Report (NTR) submissions at JPL, which were combined into a patent submission.

Subject Added Entry-Topical Term  

Orbits.

Subject Added Entry-Topical Term  

Aeronomy.

Subject Added Entry-Topical Term  

Aerospace engineering.

Index Term-Uncontrolled  

Invariant funnels

Index Term-Uncontrolled  

Resonant trajectories

Added Entry-Corporate Name  

Stanford University.

Host Item Entry  

Dissertations Abstracts International. 86-06B.

Electronic Location and Access  

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Control Number  

joongbu:658500