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Browsing by Author "Marghitu, Dan"
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Acoustic Metamaterials: Air Permeable Super Sound Attenuators and Acoustic Metalenses
Zhang, Fuxi (2019-07-23)
In recent decades, acoustic metamaterials have become more practical for diverse applications of sound manipulation, rather than academic curiosities and theoretical derivations. This kind of artificial material demonstrates ...
Adaptive Disturbance Rejection and Stabilization for Rotor Systems with Internal Damping
Simon, Andras (2009-05-15)
Advanced rotor systems today consist of a lightweight rotor supported by radial active
magnetic bearings (AMB). These systems are widely used in flywheel applications and in
other fields where high rotational speeds are ...
An Analysis of Elastic Rough Contact Models
Xu, Yang (2012-07-27)
The problem of elastic contact between one nominally flat rough surface and one rigid flat is studied. A variety of contact models have been applied to this problem since the pioneering work of Archard in 1956. Those contact ...
An analytical and experimental study on 3D-printed custom surfaces for benthic algal biofilms
Kardel, Kamran (2016-07-08)
Due to their fast growing rates and regeneration, algae are a promising avenue for biofuels, aquatic pollution recovery, and a source of protein nutrients, among others. Cultivation of benthic algal communities, in particular, ...
Chaotic Dynamic Character of Human Chewing Determined Using New Three-Dimensional Motion Capture Techniques
McIntyre, Joseph (2015-05-05)
A need exists to determine the dynamic character of natural human chewing so human mandible or lower jaw biomechanics can be fully understood. No one has reported investigating the dynamic character of natural human chewing ...
Closely Coupled GPS/INS Relative Positioning For Automated Vehicle Convoys
Martin, Scott (2011-04-15)
In this thesis, differential GPS methods are developed for use in automated vehicle convoy positioning. The GPS pseudorange and carrier phase measurements are used to compute relative position vectors between two vehicles ...
Cold Metal Transfer-Gas Metal Arc Welding (CMT-GMAW) Wire + Arc Additive Manufacturing (WAAM) Process Control Implementation
Hunko, Wesley (2018-04-13)
While additive manufacturing is comprised of metal and polymer fabrication, current additively manufactured polymer-based products are much further from being put into industrial applications. Metal-based additive ...
Controlling the Speed of a Magnetically-Suspended Rotor with Compressed Air
Jantz, Robert (2011-04-08)
Magnetic bearing research is generally concerned with the development of the automatic control systems required to levitate a rotor, driven by either an electric motor or air turbine. The regulation of rotor speed in ...
Coupling GPS/INS and IMM Radar Tracking Algorithms for Precise Collaborative Ground Vehicle Navigation
Selikoff, Joseph (2018-12-07)
This thesis describes a method of collaborative ground vehicle navigation utilizing shared
radar data to provide observations during periods of GPS degradation. Navigational errors that
typically arise from degraded GPS ...
Cranial cruciate ligament rupture in the dog: Gait analysis with an electronic walkway system and investigation in the role of steroid hormones on collagen homeostasis
Light, Victoria (2011-05-09)
Canine CCL rupture is one of the leading orthopedic problem in the United States and other parts of the world. It has been suggested that gonadectomy of the male is a risk factor for trauma to the CCL, implying that sex ...
Design and Characterization of a Novel Filling Yarn Insertion System for Weaving Machines
Meeks, Steven (2012-04-11)
Weaving is a textile manufacturing process in which weft yarns are inserted by machines through a gap in the warp yarns called a shed to form a woven fabric through interlacing. The filling insertion systems that are ...
Determination of the Allowable Parametric Uncertainty in the Closed Loop Via a Skew-μ Based Technique with an Application to the Yaw-Roll Vehicle Model
Brown, Lowell (2017-08-14)
In this dissertation, a methodical approach is presented that quantifies how well model parameters need to be known or by how much they can vary in order that the performance of a controller in closed loop is maintained. ...
Deterministic Elastic-Plastic Modelling of Rough Surface Contact including Spectral Interpolation and Comparison to Theoretical Models
An, Bowen (2017-11-17)
Rough surfaces can be seen everywhere in our world, such as on table surfaces, roads, or cellphone screens. The interactions of rough surfaces are essential problems because they govern friction, wear, contact resistance ...
Development of ANVEL HIL/SIL Simulation Environment for Rapid Prototyping of Navigation Algorithms
Nelson, Brently (2018-05-04)
This thesis presents the development of a Hardware In the Loop/Software In the Loop (HIL/SIL) simulation environment with the purpose of testing Global Positioning System/Inertial Navigation System (GPS/INS) navigation ...
Development of Test Protocols for Analysis of Low Back Exertions in Standing Position
Soman, Varun (2012-05-16)
More than 80 percent of people suffer from low back pain at some point in their lifetime costing losses of up to $9 billion because of treatment and loss of work hours in the US alone. Kinematics and kinetics of body ...
Dynamics and Synthesis of Kinematic Chains with Impact and Clearance
Stoenescu, Eleonor (2005-05-15)
The dynamics and synthesis of open and closed kinematic chains with frictional impact and joint clearance is studied.
The impact between rigid bodies with friction is investigated. A new model of impact with friction ...
Electrical and Nonlinear Optical Studies of Specific Organic Molecular and Nonconjugated Conductive Polymeric Systems
Narayanan, Ananthakrishnan (2010-10-15)
In this research, structural, electrical and nonlinear optical characteristics of: (a) single
crystal films involving a noncentrosymmetric molecule DAST and a laser dye IR125 and (b)
specific nonconjugated conducting ...
Enhancement and Defense of GPS Navigation Using Signal Processing Techniques
Carson, Nathaniel (2018-02-14)
In this thesis methods of spoo ng prevention are developed to detect, identify, and
mitigate an attack against both networked and standalone GPS receivers. A network based
detection algorithm is introduced which combines ...
Establishing Viability of a Novel Wire Induction Extrusion 3D Printing Method
Knotts, Michael James (2020-07-31)
Metal additive manufacturing is an emerging alternative to traditional manufacturing. While several systems currently exist within the realm of metal 3D printing, there is room for further innovation and development to ...
Experimental analysis of the wear of rubber against harder materials in reciprocating motion
Zhao, Yang (2015-07-21)
This work investigated the wear performance of rubber when contacted against harder composite materials through experimental analysis. The focus of this thesis was to find the optimal type of rubber and the composite ...