Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Spacecraft guidance"”.
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Low-thrust Spacecraft guidance and control using proximal policy optimization
… new technology. In the coming decades, future spacecraft will be required to possess autonomous guidance and control in the complex, nonlinear dynamical regimes of cis-lunar space. In the realm of trajectory design, current methods struggle with local minima, and searching large solutions …
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Model-Based and Data-Driven Covariance Control: Theory and Applications
… is demonstrated through applications such as spacecraft guidance, quadrotor path planning, and motion planning for autonomous vehicles, highlighting their broader impact. By uniting the precision of model-based methods with the adaptability of data-driven techniques, this research establishes …
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A new guidance method for a DeltaV and re-entry constrained orbit transfer problem
This thesis proposes a spacecraft guidance system designed for a unique class of orbit transfer problems. It considers a vehicle that undertakes a maneuver with the objective of precisely flying through a point in space at a particular time. The spacecraft must automatically determine a transfer …
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Centimeter-Scale Spacecraft: Design, Fabrication, And Deployment
… Many of these components are suitable for use in spacecraft. Their availability has led to the ongoing revolution in small satellites, most visibly exemplified by the CubeSat standard. This study seeks to push these trends toward their ultimate extreme: a satellite-on-a-chip. The ability to mass …
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Low-Gravity Sloshing in Spherical Tanks: Experimental Investigation Toward Numerical and Analytical Modeling
Uncontrolled sloshing in spacecraft propellant tanks can severely disturb vehicle attitude and dynamics, jeopardizing critical proximity maneuvers. Despite decades of research, the dynamics of low-gravity sloshing remain insufficiently understood and difficult to model with reliability, also due to …
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Towards Autonomy: Leveraging Nonlinearity In Predictive And Convex Optimization For Space Vehicle Guidance And Control
… new age of spaceflight approaches, space vehicle guidance and control methodologies increasingly rely on optimization-based methods, which should be capable of handling complex dynamics, real-world constraints, and limited computational resources. While model predictive control (MPC) and …
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Robust Spacecraft Autonomy for Deep Space Exploration in Special Euclidean Group SE(3)
… have not truly left Earth since the Apollo, as spacecraft in some LEOs remain subject to atmospheric drag thus emphasizing their continued connection to Earth's immediate environment. Reflecting on this, it becomes clear that humanity has largely remained bound to Earth’s immediate vicinity …