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 “"Aerospace engineering and mechanics"”.
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Molecular dynamics modeling of normal shock waves in monatomic and polyatomic gas mixtures.
… of normal shock waves in dilute Nitrogen and mixtures of Helium-Argon and Helium-Xenon. The use of realistic MD simulations of normal shock waves promises to provide a more detailed solution than can be provided experimentally, providing a means to validate and create better DSMC models. …
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Robust, model-based fault detection for commercial transport air data probes.
… due to sensor faults jeopardizes an aircraft and its passengers. To address such faults, sensor hardware redundancy is typically combined with a voting system to detect and discard erroneous measurements. This approach relies on redundancy, which may lead to unacceptable increases in system …
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Simulation and optimization of spacecraft re-entry Trajectories
… control has the advantage of often being easier and faster to solve than general optimal control methods, and may be better suited to the task of spacecraft re-entry trajectory optimization. In this thesis, a parameter optimal control algorithm is implemented in MATLAB® to optimize a 2-D re-entry …
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Methods for enhancing carrier phase GNSS positioning and attitude determination performance.
… the integer ambiguity resolution performance and carrier phase error modeling. CDGNSS is considered for a broad range of real-time applications which require both a high precision relative positioning and attitude determination system. This is because of the drift-free nature of the GNSS …
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Thermodynamic modeling of martensitic transformations in shape memory alloys.
… In particular, the Morse pair potential is used and its adjustable coefficients are taken to be temperature dependent. A hysteretic temperature-induced MT between the B2 cubic and B19 orthorhombic crystal structures is predicted. This is the behavior that is observed in the real material. The …
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Results on the interaction between atomistic and continuum models
… constitutive relations for continuum models, and robust multiscale methods for studying systems with multiple length and time scales. We use a unified framework to study the Irving--Kirkwood and Murdoch--Hardy procedures used to obtain definitions for continuum fields in atomistic systems. We …