Browsing Mechanical Engineering Theses and Dissertations by Title
Now showing items 1-20 of 993
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Access Scheduling and Controller Design in Networked Control Systems
(2005-10-05)A Networked Control System (NCS) is a control system in which the sensors and actuators are connected to a feedback controller via a shared communication medium. In an NCS, the shared medium can only provide a limited ... -
ACOUSTIC EMISSION-BASED STRUCTURAL HEALTH MANAGEMENT AND PROGNOSTICS SUBJECT TO SMALL FATIGUE CRACKS
(2014)One of the major concerns in structural health management (SHM) is the early detection of growing crack. Using this, future consequential damage due to crack propagation can be reduced or eliminated by scheduling maintenance ... -
ACTIVE ACOUSTIC METAMATERIAL
(2015)A class of active acoustic metamaterial (AAMM) is presented. The proposed AAMM consists of an acoustic transmission line connected in parallel to an array of Helmholtz resonators that are provided with actively controlled ... -
ACTIVE CONTROL OF NON-RECIPROCAL ACOUSTIC METAMATERIAL WITH A DYNAMIC CONTROLLER
(2019)Reciprocity is one of the fundamental properties in the field of wave propagation. In acoustics, this property helps in various practical applications. But, breaking this reciprocity also has useful applications. As a ... -
Active Control of Sound Transmission Into Three-Dimensional Enclosures
(2004-05-12)The aim of this dissertation work is to understand active control of sound fields inside a three-dimensional rectangular enclosure into which noise is transmitted through a flexible boundary. To this end, analytical and ... -
AN ACTIVE NON-INTRUSIVE SYSTEM IDENTIFICATION APPROACH FOR CARDIOVASCULAR HEALTH MONITORING
(2014)In this study a novel active non-intrusive system identification paradigm is developed for the purpose of cardiovascular health monitoring. The proposed approach seeks to utilize a collocated actuator sensor unit devised ... -
ACTIVE NONRECIPROCAL ACOUSTIC METAMATERIALS
(2017)In this thesis, the emphasis is placed on the development of a class of active acoustic diodes and metamaterials in an attempt to control the flow and distribution of acoustic energy in acoustic cavities and systems. Such ... -
Adaptive Gradient Assisted Robust Optimization with Applications to LNG Plant Enhancement
(2012)About 8% of the natural gas feed to a Liquefied Natural Gas (LNG) plant is consumed for liquefaction. A significant challenge in optimizing engineering systems, including LNG plants, is the issue of uncertainty. To exemplify, ... -
ADAPTIVE SAMPLING METHODS FOR TESTING AUTONOMOUS SYSTEMS
(2018)In this dissertation, I propose a software-in-the-loop testing architecture that uses adaptive sampling to generate test suites for intelligent systems based upon identifying transitions in high-level mission criteria. ... -
Adaptive Superposition of Finite Element Meshes in Linear and Nonlinear Dynamic Analysis
(2005-12-05)The numerical analysis of transient phenomena in solids, for instance, wave propagation and structural dynamics, is a very important and active area of study in engineering. Despite the current evolutionary state of modern ... -
Additive Manufacturing of Microfluidic Technologies via In Situ Direct Laser Writing
(2021)Innovations in microfluidic technologies hold great promise for a wide range of chemical, biomedical, and soft robotic applications. Unfortunately, key drawbacks associated with soft lithography-based microfabrication ... -
Adhesion Strength Measurement of Multilayer Structures with Vertical Crack by Four Point Bending Test
(2014)Current microelectronic packages consist of multilayer systems. Adhesion strength is one of the most important factors to the reliability of these systems. Previous studies have used four point bending tests as a method ... -
ADVANCED ABSORPTION MATERIALS AND THEIR APPLICATION IN REFRIGERATION
(2021)Absorption chillers, which utilize heat as the primary energy input, have been considered a more environment-friendly alternative to vapor-compression cooling systems. The thermodynamic properties of absorbent generally ... -
Advanced Adhesion Strength Testing Methods of Thin Film Multilayers in Electronic Packaging Systems
(2016)With the continued miniaturization and increasing performance of electronic devices, new technical challenges have arisen. One such issue is delamination occurring at critical interfaces inside the device. This major ... -
Advanced Blister Test with Predefined Area
(2014)An advanced blister test using a predefined blister area is employed to determine the adhesion strength (energy release rate) as well as characterize the flexural modulus of polymer material. The predefined blister area ... -
Advanced FBG Sensor Technique to Measure Effective Chemical Shrinkage and Modulus Evolutions of Polymers with High Polymerization Exothermic Heat
(2012)An advanced technique based on a fiber Bragg grating (FBG) sensor is proposed to measure the critical mechanical properties of polymeric materials during polymerization: effective chemical shrinkage and modulus evolutions. ... -
Advanced Honeypot Architecture for Network Threats Quantification
(2009)Today's world is increasingly relying on computer networks. The increase in the use of network resources is followed by a rising volume of security problems. New threats and vulnerabilities are discovered everyday and ... -
Advanced methodologies for reliability-based design optimization and structural health prognostics
(2010)Failures of engineered systems can lead to significant economic and societal losses. To minimize the losses, reliability must be ensured throughout the system's lifecycle in the presence of manufacturing variability and ... -
ADVANCED MODELING AND REFRIGERANT FLOW PATH OPTIMIZATION FOR AIR-TO-REFRIGERANT HEAT EXCHANGERS WITH GENERALIZED GEOMETRIES
(2019)Air-to-refrigerant heat exchangers are key components of the heating, ventilation, air-conditioning and refrigeration systems. The evolving simulation and manufacturing capabilities have given engineers new opportunities ... -
ADVANCED PACKAGING AND THERMAL MANAGEMENT OF DC-DC CONVERTERS AND NOVEL CORRELATIONS FOR MANIFOLD MICROCHANNEL HEATSINKS
(2021)An advanced packaging configuration of a dual-active-bridge 10 kW DC-DC converter module is introduced in this dissertation. Through utilization of novel heatsinks for the power switches and the transformer assembly, ~20 ...