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Browsing Aeronautics and astronautics by Title
Now showing items 1-20 of 314
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3-D Particle Tracking Velocimetry: Development and Applications in Small Scale Flows
(2013-07-25)The thesis contains two parts of studies. In part I, a novel volumetric velocimetry technique is developed to measure the 3-D flow field of small-scale flows. The technique utilizes a color-coded pinhole plate with multiple ... -
A Domain-Hybridized Plasma Model Using Discontinuous Galerkin Finite Elements
Plasmas are found all over the Universe and exhibit varying properties depending on temperature, density, field strength, and collisionality. Thus, various physics models can be used to describe plasma dynamics. This work ... -
A Gimbal-Supported, Mono Camera, Relative Position Measurement System of a Visually Distinct Object for UAV Guidance
This thesis describes a vision-based system for measuring distance and bearing between an unmanned aerial vehicle (UAV) and a ground object. The system is built of a single camera, mounted on a gimbal, which stabilizes ... -
A Kinetic Vlasov Model for Plasma Simulation Using Discontinuous Galerkin Method on Many-Core Architectures
Advances are reported in the three pillars of computational science achieving a new capability for understanding dynamic plasma phenomena outside of local thermodynamic equilibrium. A continuum kinetic model for plasma ... -
A Methodology for Determination of Entry, Descent, and Landing Design Performance Margins of Spacecraft Landing on Planetary Bodies
Design of a spacecraft and mission architecture that provide adequate performance margin is essential to successful spaceflight. This is particularly true for the Entry, Descent and Landing (EDL) phase of a landed mission. ... -
A Novel Experimental Approach for Curing Polymer Analysis
In aerospace industry, understanding the development of stress within the composite part is a crucial aspect in producing high-quality composite parts. One such issue in composite manufacturing is the volume change of the ... -
A Three-Dimensional Particle Tracking Velocimetry System for the Evaluation of Large-Eddy Simulation Turbulence Models
The necessity for evaluating the accuracy and characteristics of new Large-Eddy Simulation (LES) turbulence models in modern fluid mechanics research has inspired the development of a Three-Dimensional Particle Tracking ... -
Acoustic Emission Beamforming for Detection and Localization of Damage
The aerospace industry is a constantly evolving field with corporate manufacturers continually utilizing innovative processes and materials. These materials include advanced metallics and composite systems. The exploration ... -
Acoustic Manipulation of Macroscopic Objects
Acoustic waves can apply radiation forces to trap and levitate objects. Most recently, three-dimensional acoustic traps have been created using single-sided multi-element arrays. Almost all the work accomplished in this ... -
Adaptation and Automation of Search and Rescue Patterns with Implementation for an Operational Unmanned Aircraft System
(2014-02-24)The development and employment of Unmanned Aircraft Systems (UAS) is transferring many missions from manned aircraft to UAS. Search is one of these missions. This work proposes leveraging the familiar, well-established ... -
Advances and Applications of Multiple Scale Methods in Complex Dynamical Systems
High dimensionality, numerical stiffness, and complex subsystem interactions pose fundamental challenges for the design, analysis, and certification of modern aerospace systems. This dissertation addresses these issues by ... -
Advances in Baffled and Railed Tube Ram Accelerator Operation and Modeling
The ram accelerator is a novel chemical propulsion device capable of accelerating projectiles up to orbital velocities. It utilizes a ramjet-like propulsive cycle, where a projectile travels through a stationary tube ... -
Aerodynamics of a Swept Wing With Simulated Scalloped Ice at Low Reynolds Number
This thesis studied the aerodynamic effects of a single high-fidelity scalloped ice accretion simulation and a low-fidelity simulation of the same shape. These data were compared to the aerodynamics of a clean 8.9% scale ... -
Aeroelasticity of Nonlinear Tail / Rudder Systems with Freeplay
This thesis details the development of a linear/nonlinear three degree of freedom aeroelastic system designed and manufactured at the University of Washington (UW). Describing function analysis was carried out in the ... -
Agent-Based Time Scaling in Cooperative Multi-Agent Systems
One of the most basic, yet important, assumptions we tend to make when considering a set of dynamics is that it evolves with respect to some standard measure of time. This is not true in all cases, of course, and taming ... -
An Algorithm for Autonomous Formation Obstacle Avoidance
(2013-07-23)The level of human interaction with Unmanned Aerial Systems varies greatly from remotely piloted aircraft to fully autonomous systems. In the latter end of the spectrum, the challenge lies in designing effective algorithms ... -
Altitude-Constrained Occlusion-Aware UAV Coverage Planning for Autonomous Wilderness Search and Rescue
Autonomous Unoccupied Aerial Vehicles (UAVs) have transformed how search and rescue (SAR) missions operate, enabling rapid real-time video feedback over large and difficult-to-access areas. However, ensuring full search ... -
An Investigation of a Vertical Test Method for Large Deformation Bending of High Strain Composite Laminates
Research to date indicates that traditional composite material failure analysis methods are not appropriate for thin laminates in flexure. Thin composite structures subjected to large bending deformations often attain ... -
An Investigation of Optimal Powered Descent
Achieving fuel-optimal pinpoint landings is a vital component of many missions. In this paper, the foundational components of optimal control theory known as Pontryagin’s Maximum Principle are derived, and an example is ... -
Analysis of Delamination Arrest Fasteners in Bolted-Bonded Composite Structures
(2014-04-30)Delamination is one of the most critical damages in carbon fiber composites, which are being employed in primary aircraft structures. One common solution to prevent a delamination from propagating is to install fasteners, ...