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 6 of 6 for “"trajectory evaluation"”.
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Assessment of a Space Shuttle trajectory evaluation system (DOLILU II)
DOLILU II is a ground control system that generates space shuttle's launch trajectories, first stage guidance commands and verifies whether the generated trajectories are safe for the flight. It is a safety critical system and a high degree of confidence in its safety and reliability must be gained …
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Constrained trajectory optimization of a soft lunar landing from a parking orbit
A trajectory optimization study for a soft landing on the Moon, which analyzed the effects of adding operationally based constraints on the behavior of the minimum fuel trajectory, has been completed. Metrics of trajectory evaluation included fuel expenditure, terminal attitude, thrust histories, …
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Advanced four-dimensional trajectory generation for tactical guidance of unmanned aerial vehicles
… unmanned systems, to develop a technique for trajectory generation that not only works efficiently in the current architecture but also enhances the capabilities. The algorithm is based on a segmented trajectory constructed using quartic, i.e. 4ᵗʰ order, Pythagorean Hodograph (PH) curves based …
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Collaborative Autonomy of Multi-Agent Aerial Systems for Future Disaster Response
… crowding quantification and entropy-based trajectory evaluation to maintain diversity and alleviate congestion. Chapter 5 introduces a fully decentralized UAV-assisted mobile edge computing framework consisting of a K-Grouped Soft Actor-Critic with Trajectory Planning (KGSAC-TP) algorithm …
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A subspace approach to accelerated cardiovascular magnetic resonance imaging
… data after every excitation; and c) k-space trajectory evaluation and design, replacing Cartesian trajectories which are highly sensitive to readout direction. The image reconstruction work centers on the integration of the subspace model, sensitivity encoding (for parallel imaging), and …
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Effectiveness of Compensatory Vehicle Control Techniques Exhibited by Drivers after Arthroscopic Rotator Cuff Surgery
… for future sensors that are used to make these trajectory comparisons. This investigation leverages pre-existing data collected by the Virginia Tech Transportation Institute (VTTI) and Carilion Clinic as used in the analysis performed by Badger et al. (2022). RCR patients (n=27) executed the …