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 20 of 280 for “"electro-mechanical"”.
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An electro-mechanical acoustic imaging scanner assembly.
The design of "a combined electro-mechanical acoustic image scanning assembly is described. Various acoustic imaging system techniques have demonstrated an ability to form underwater images at distances greater than those obtained by optical means. The scanning assembly -utilizes a sixteen element …
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Electro-Mechanical Interactions in Superconducting Spoke -Loaded Cavities
This dissertation reports an investigation of the mechanical and electromagnetic properties of a beta = 0.4 double-spoke-loaded and a beta = 0.5 triple-spoke-loaded superconducting cavity at Argonne National Laboratory. These cavities are of interest in new heavy-ion and proton linear accelerators. …
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Investigation of electro-mechanical properties of soil materials
The variations of soil physical properties throughout the world play a significant role in agricultural production and understanding where these variations occur may lead to enhancement of crop production and soil protection. Methods used to determine these properties today present a significant …
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Modeling of micro-electro-mechanical integrated test structures
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Shape and Topology Optimization for electro-mechanical energy converters
… the industrial sector requires high-efficiency electro-me- chanical energy converters, in particular electrical rotating machines, at the lowest possible cost. The use of modern power electronics converters at all levels of elec- trical power applications, involves, on the other hand, switching …
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Nano-electro-mechanical systems fabricated by tip-based nanofabrication
… we demonstrated various types of silicon NEMS mechanical resonators such as single-clamped, double-clamped, wavy-shaped, spider-like and spiral-shaped using this TBN method with a heated AFM tip. Laser interferometer measurement on two NEMS resonators showed resonance frequencies of 1.2MHz and …
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ELECTRO-OPTICAL AND ELECTRO-MECHANICAL RESPONSE OF FERROELECTRIC NEMATIC FLUIDS
… research and the realization of next generation electro-optical devices. The present thesis is mainly focused on three major topics, concerning various electro-optical and electro-mechanical properties of the NF phase of RM734, the first reported ferroelectric nematic mesogen. First, the surface …
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Design and manufacture of an electro-mechanical hand position tracker
This thesis discusses the conceptual design, manufacture, and assembly of a device that tracks the movements and position of a user's hand. This device will be used for stroke patients undergoing rehabilitation using robotic aids, monitoring their use of their unimpaired hand, particular when …
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Design and Implementation of the Kinect Controlled Electro-Mechanical Skeleton (K.C.E.M.S)
… was able to mimic many human movements but was mechanically limited in the shoulders. Its movements were slower then real-time due to the inability for the controller to handle real-time motions. This research was presented and published at the 2012 SouthEastCon. Along with this, research papers …
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Microactuators and their application in micro-opto-electro-mechanical systems (MOEMS)
Microactuators are active elements for microelectromechanical systems (MEMS), and are used to provide force to move the MEMS device in the way required. Therefore, their force characteristics, displacement capabilities and velocity ranges are of importance, and require to be investigated. Scratch …
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Theory for hydrostatic gas journal bearings for micro-electro-mechanical systems
… to develop high-speed rotating Power MEMS (Micro-Electro-Mechanical Systems) using computer chip fabrication technologies. To produce high power (10-50 W) in a small volume (less than one cubic centimeter), the micro-turbo-machinery must be spun at a rotational speed on the order of million rpm. …
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Photo-electroforming, a new manufacturing process for micro-electro-mechanical systems
… Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Electro-Mechanical Design and Testing of a Prototype Low-Cost Rheometer
Rheology is a key part of modern society, but the devices used to measure complex fluids are large and expensive, making them unobtainable for individuals or small organizations. This thesis presents the first and second prototypes of an effort to design an accurate but low-cost (<$200) rheometer …
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Implementation of a Low Cost Micro Electro Mechanical Systems Inertial Navigation Solution
<p>The purpose of this study is to develop a low cost navigation solution for General Aviation (GA) aircraft and flight testing aircraft. This low cost solution uses a Global Positioning System (GPS) coupled with an Inertial Navigation Solution (INS) to provide a more accurate, stable navigation …
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Design and Modeling Environment for Nano-Electro-Mechanical Switch (NEMS) Digital Systems
… we study models for an innovative type of Nano-Electro-Mechanical Switch (NEMS) at the physical, logical and circuit level. NEMS are switching devices, which have virtually zero leakage current, 1-3 V operation voltage, 1-10 ns switching time, and small footprint. NEMS switches can be easily …
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Mode I and Mode II Measurements For Stiction Failed Micro-Electro-Mechanical Systems
Among MicroElectroMechanical Systems (MEMS), the most common type of failure is stiction. Stiction is the unintended adhesion between two surfaces when they are in close proximity to each other. Various studies have been conducted in recent years to study stiction. Our research group has shown the …
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Modeling, simulation, and control design of electro-mechanical dynamics in heterogeneous power systems
… reduced-order models that are applicable for electro-mechanical phenomena occurring on time-scales ranging from tenths of seconds to minutes. Along with developing the open-loop model for this framework, different types of closed-loop control are detailed, including an LQR method that can …
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FastStokes : a fast 3-D fluid simulation program for micro-electro-mechanical systems
… forces on geometrically complicated MEMS (micro- electro- mechanical systems) devices. Unlike the 3-D finite element or finite difference solvers which often take days to run to completion or fail when geometry gets complicated, the FastStokes 3.0 simulation program is capable of simulating …
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Design and demonstration of integrated micro-electro-mechanical relay circuits for VLSI applications
… One promising class of such devices is the electro-statically actuated micro-electro-mechanical (MEM) relay which offers zero leakage current and abrupt turn-on behavior. Although a MEM relay is inherently slower than a CMOS transistor due to the mechanical movement, we have developed …
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