Relevant bibliographies by topics / Electro-mechanical / Dissertations / Theses
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Dissertations / Theses on the topic 'Electro-mechanical'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Dean, Julian Sebastian. "Magnetic micro electro-mechanical systems." Thesis, University of Sheffield, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444255.

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2

Ismail, Ziad M. A. "Microprocessor control of electro-mechanical actuators." Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/11785.

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This thesis is concerned with the use of all-electric systems for the closed loop position control of mechanical (valve) actuators. It embraces a wide range of topics including * the use of 3-phase induction motors and their speed/torque control using Pulse Width Modulation techniques * implementation of both analogue and digital (PID) controllers * Using computer simulation methods for the development of digital control algorithms and tuning techniques * the use of Computer Assisted Tuning methods for tuning up the position control loop. The major hardware activities described here are concer
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3

Fu, Y. "Micro-electro-mechanical systems and nanotechnology." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599251.

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Micro-Electro-Mechanical-System (MEMS) and Nanotechnology have both received significant attention in recent years due to their potential for manufacturing highly miniaturised devices which consume less raw materials and energy in their production, and function with greater efficiency, speed, and reliability. The first project described in this thesis concerns the development of a novel, low cost, contamination-free nanofabrication system. This system is enabled by a MEMS-based device which has the dual functions of a high-precision AFM (Atomic Force Microscope) cantilever probe and a shadow m
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4

Sousounis, Marios Charilaos. "Electro-mechanical modelling of tidal arrays." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31089.

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The aim of this study is to present, compare and improve the options of power transmission for tidal current arrays. The potential to generate low or zero carbon power from the world’s tides is increasing as technology moves forward. The technically available tidal current energy resource, the resource that can be captured using existing technology, in the United Kingdom can supply a significant amount of the UK electricity demand. Even though tidal current devices have similarities to offshore wind turbines in many aspects, a number of characteristics differentiate the approach needed regardi
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5

Harden, John E. "Electro-Mechanical Couplings in Liquid Crystals." Kent State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=kent1239305653.

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6

Mukasa, Said Mutaka. "Frequency tuning of micro-electro-mechanical devices." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433145.

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7

Wang, Xuan-Qi Tai Yu-Chong. "Integrated parylene micro electro mechanical systems (MEMS) /." Diss., Pasadena, Calif. : California Institute of Technology, 2000. http://resolver.caltech.edu/CaltechETD:etd-09062005-112235.

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8

Moore, Gareth Edward. "Electro-mechanical interactions in aerospace gas turbines." Thesis, University of Nottingham, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.768249.

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The provision of electrical power on modern aircraft is a necessary and growing aspect of a gas turbine's function. The replacement of traditional pneumatic, hydraulic and mechanical systems with electrical equivalents means that electricity is now the dominant means of power distribution on aircraft. However, the electrical loads seen on aircraft present challenges, as they are time varying and are often non-linear. This is particularly true for loads such as radar. The aviation industry has adopted the term More Electric Aircraft (MEA) to describe the latest generation of aircraft with a hig
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9

Thomas, Evan L. H. "Nanocrystalline diamond for nano-electro-mechanical systems." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/99464/.

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Micro and Nano-Electro-Mechanical Systems (MEMS/NEMS) incorporating micro- and nano-scale mechanical elements into electronic circuits are of increasing interest in both fundamental physics and technological applications, with uses ranging from atomic resolution mass spectrometers to low cost gravimeters and RF filtering. For applications reliant on the perturbation of mechanical elements, a high resonant frequency (f) with minimal dissipation (Q−1) is desired to increase device response, while for filtering within the RF high Q enables the selection of individual channels. With the resonant f
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10

Güler, Kenan, and Milan Andelkovic. "Shock Load Absorption of Electro-mechanical Actuators." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300158.

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När ett ställdon får som krav att kunna överföra höga krafter i relativt höga hastigheter med en dessutom väldigt hög precision är elektromekaniska ställdon oftast att föredra. En traditionell pinjong-kuggstång-uppställning uppfyller vissa av de kraven, men om kraften ska ökas behövs det fler än ett pinjongpar. Begränsningar på tillverkningsprecisionen för dessa kugghjul gör att deras ansättning på kuggstången blir omöjlig för uppsättningar med fyra eller åtta pinjongpar eftersom ett sådant ställdon blir statiskt överbestämt och på grund av tillverkningstoleranser kan det bli svårt att erhålla
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11

Adsul, Raveena Dnyaneshwar. "Reliability Assessment of Electro-mechanical Linear Actuator." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301632.

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Syftet med denna avhandling var att uppskatta livslängden och tillförlitligheten för det elektromekaniska linjära ställdonet genom att använda metoder för sannolikhet och statistik, med fokus på att fastställa svagare områden som kan förbättras för att inkludera dessa förbättringar i kommande generation. Bedömningen gjordes kvantitativt och kvalitativt. FMEA valdes för den kvalitativa analysen. För den kvantitativa analysen bedömdes Weibull-distribution vara den mest lämpliga för att skatta komponenternas felfrekvens. För detta valdes form- och skalparametrar enligt B. Bertsche. [1] Övergripan
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12

De, Bonis Sergio Lucio. "Polaron physics in carbon nanotube electro-mechanical resonators." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/668846.

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Carbon nanotube (CNT) mechanical resonators are unique systems because they combine remarkable mechanical properties with rich charge transport characteristics. Thanks to their intrinsically low-dimensional nature, their mass is extremely low. The mechanical resonance frequency reaches the GHz regime, can be widely tunable and they show quality factor as high as several million. Nanotubes hold great promise for sensing applications. Nanotubes are an excellent system to study quantum electron transport, which range from abry-Pérot interference to Coulomb blockade. These completely opposite regi
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13

Zhao, Li. "Micro-electro-mechanical Tilt Sensor Design and Fabrications." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506035.

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14

Wu, SunMan Patrick. "Modeling of micro-electro-mechanical integrated test structures." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36044.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.<br>Includes bibliographical references (leaf 38).<br>by SunMan Patrick Wu.<br>M.Eng.
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15

Yan, Jize. "Micro/nano-electro-mechanical resonators for signal processing." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613372.

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16

James, William Thomas. "Electro-thermal-mechanical modeling of GaN HFETs and MOSHFETs." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41212.

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High power Gallium Nitride (GaN) based field effect transistors are used in many high power applications from RADARs to communications. These devices dissipate a large amount of power and sustain high electric fields during operation. High power dissipation occurs in the form of heat generation through Joule heating which also results in localized hot spot formation that induces thermal stresses. In addition, because GaN is strongly piezoelectric, high electric fields result in large inverse piezoelectric stresses. Combined with residual stresses due to growth conditions, these effects are bel
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17

Bissal, Ara. "On the Design of Ultra-fast Electro-Mechanical Actuators." Licentiate thesis, KTH, Elektroteknisk teori och konstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121181.

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The continuously increasing demand for connecting electric grids with remote renewable energy sources such as wind power and photovoltaic cells has rekindled interest in high voltage direct current (HVDC) multi-terminal networks. Although HVDC networks have numerous benefits, their adoption relies entirely on the availability of HVDC circuit breakers which, compared to traditional alternating current circuit breakers, have to operate in a time frame of milliseconds. This thesis deals with the design of ultra-fast electro-mechanical actuators based on the so-called Thomson coil (TC) actuator. T
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18

Urbina, Raul. "Optimization of a Multi-Aixs Electro-Mechanical Scanning System." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/UrbinaR2001.pdf.

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19

Karlsson, Martin. "Electro-mechanical modelling and analysis of hydroelectric rotor systems." Licentiate thesis, Luleå : Luleå University of Technology, 2006. http://epubl.luth.se/1402-1757/2006/10.

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20

Lipson, Ariel. "A tunable micro-electro-mechanical optical filter in silicon." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441291.

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21

Arab, Hassani Faezeh. "Resonant nano-electro-mechanical sensors for molecular mass-detection." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/336335/.

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This research is conducted as a part of EU FP7 project entitled NEMSIC (hybrid nanoelectro-mechanical/integrated circuit systems for sensing and power management applications) with project partners, EPFL, TU Delft, IMEC-NL, CEA-LETI, SCIPROM, IMEC-BE, Honeywell Romania, and HiQSCREEN. Nano-electro-mechanical (NEM) sensors are getting an increased interest because of their compatibility with “In-IC” integration, low power consumption and high sensitivity to applied force, external damping or additional mass. Today, commercial biosensors are developed based on mass-detection and electro-mechanic
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22

Zohur, Abdul. "Micro-Electro-Mechanical Systems (MEMS) Integrated Frequency Reconfigurable Antenna." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1731.

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In this paper, the design, analysis, and characterization of reconfigurable antennas based on radio frequency micro-electro-mechanical systems (RF MEMS) operating in the United States' public safety (PS) bands are presented. The design methodology of these antennas, which are different from the normal antenna design, is also reported. In this thesis, two electrically small reconfigurable antenna designs have been presented, with two and three modes of operation, and central frequencies of 718 and 4960 MHz and of 857,809 and 4960 MHz, respectively. The maximum frequency tunable ratio achieved i
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23

Piratla, Sarvani. "Fully-Coupled Characterization of Thermo-Electro-Magneto-Mechanical Materials." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243875108.

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24

Edwards, Laura Elizabeth. "Structural magnetic materials for use in electro-mechanical applications." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730860.

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25

Mohammed, Dilveen Waheed. "Mechanical and electro-mechanical reliability of transparent oxide thin films for flexible electronics applications." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7997/.

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Flexible electronic devices such as solar cells, touch panels and wearable displays have developed industrially and commercially in recent years because they are flexible and light weight at low cost. Since such devices constitute a brittle oxide layer applied to a polymer substrate, the cracking and/or film damage of the brittle inorganic coating when the device is under different mechanical and environmental loading during processing and service is one of the most important problems in the flexible electronic industry. This can lead to degradation and reduction in electrical functionality of
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26

Tan, Nicola. "Design and manufacture of an electro-mechanical hand position tracker." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40943.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (p. 47).<br>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 performing bimanual tasks. This device uses a system of linkages and potentiometers to track the angles of the wrist, as well as the MCP and CMC joints of the ind
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27

Lui, Emily. "Multi-Physics Interactions for Coupled Thermo-Electro-Magneto-Mechanical Effects." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306897291.

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28

Santiago, Alfonso. "Fluid-electro-mechanical model of the human heart for supercomputers." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/481980.

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The heart is a complex system. From the transmembrane cell activity to the spatial organization in helicoidal fibers, it includes several spatial and temporal scales. The heart muscle is surrounded by two main tissues that modulate how it deforms: the pericardium and the blood. The former constrains the epicardial surface and the latter exerts a force in the endocardium. The main function of this peculiar muscle is to pump blood to the pulmonary and systemic circulations. In this way, solid dynamics of the heart is as important as the induced fluid dynamics. Despite the work done in computatio
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29

Margani, Azeddin Mohamed Shaeb. "An integrated environment for electro-mechanical systems design and analysis." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263426.

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30

Gunupudi, Bindu. "Coupled superconducting microwave resonators for studies of electro-mechanical interaction." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5699/.

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The motivation behind the work described in this thesis is to study the coupling between a nanobar and a pair of identical, coupled, superconducting microwave resonators, where the splitting frequency at their avoided crossing is close to the nanobar resonant frequency. The splitting frequency as a function of the coupling between the microwave resonators has been thoroughly investigated by theoretical simulations in COMSOL and AIM Spice, and experimentally verified by low temperature measurements. Deviations of the measured splitting from the theoretical values and reflection measurements sho
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31

Liao, Guangxun. "Mechanical and Electro-Optical Properties of Unconventional Liquid Crystal Systems." Kent State University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=kent1131600449.

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32

Dutta, Indrajit. "Electro-Mechanical Behavior of Strontium Modified Lead Zirconate Titanate Ceramics." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187036967.

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33

Rossi, Marco, Thomas Wallmersperger, Jorge Alejandro Ramirez, and Paola Nardinocchi. "jz Thermodynamically consistent electro-chemo-mechanical model for polymer membranes." SPIE, 2018. https://tud.qucosa.de/id/qucosa%3A35160.

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Nafion membranes, are polymeric thin films widely employed in micro-batteries and fuel cells. These devices are expected to play a key role in the next generation energy systems for use in vehicles as a replacement to combustion engines. In fact, a minimum environmental impact is guaranteed by reduced carbon dioxide emissions. It is usually complicated to investigate the behavior of thin membranes through experiments. Therefore, numerical simulations are carried out in order to enable a better understanding of the phenomena and of the multi-field couplings occurring in polymeric membranes. A c
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34

Leong, Jonathan Yonghui. "Lubrication and tribological performance optimizations for micro-electro-mechanical systems." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18067.

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Lubricants and lubrication have been of great interest to mankind since the introduction of machines with sliding/rolling surfaces into everyday life. With the recent trend of miniaturization, Micro-Electro-Mechanical Systems (MEMS) have taken centre stage, featuring components with scales in dimensions as small as nanometres. In this PhD study, two approaches to solving MEMS tribology problems have been pursued. First, a novel direct lubrication method using well-known lubricants such as perfluoropolyether (PFPE) and multiply alkylated cyclopentane (MAC) was developed and tested using recipro
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35

Martinez, Jose Antonio. "A Micro-Opto-Electro-Mechanical System (MOEMS) for Microstructure Manipulation." FIU Digital Commons, 2008. http://digitalcommons.fiu.edu/etd/206.

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Microstructure manipulation is a fundamental process to the study of biology and medicine, as well as to advance micro- and nano-system applications. Manipulation of microstructures has been achieved through various microgripper devices developed recently, which lead to advances in micromachine assembly, and single cell manipulation, among others. Only two kinds of integrated feedback have been demonstrated so far, force sensing and optical binary feedback. As a result, the physical, mechanical, optical, and chemical information about the microstructure under study must be extracted from macro
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36

Assadsangabi, Babak. "Investigation and development of ferrofluid enabled micro-electro-mechanical systems." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50339.

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Ferrofluids are magnetic fluids that can be manipulated using magnetic field. Ferrofluids have unique properties that have led to various interesting applications. Although, currently they are being used in few commercial products in macro-scale domain, there has been limited success in their applications in micro- devices and microactuators in specific. Literature review shows various efforts to develop ferrofluid-based microactuators however, most of them have utilized non-integrated means (e.g. external magnets or solenoids) to provide the necessary magnetic field for ferrofluid manipulatio
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37

Tsao, Che-Chih. "Photo-electroforming, a new manufacturing process for micro-electro-mechanical systems." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/38039.

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38

Liu, Lixian Ph D. Massachusetts Institute of Technology. "Theory for hydrostatic gas journal bearings for micro-electro-mechanical systems." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33921.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>"September 2005."<br>Includes bibliographical references (p. [281]-283).<br>The goal of the MIT micro-engine project is 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. This ultra-high rotational speed, together with the small length-to-diameter ratio (L
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39

Kumar, Prabhanjan. "The effect of electro-mechanical load on the electrical and mechanical properties of battery tab joints." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/98040/.

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Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV) are seen as solutions to meet the rising demand of consumers whilst overcoming challenges such as dependency on fossil fuels and carbon dioxide emissions. The success of these vehicles is highly dependent on reliable and efficient Energy Storage Systems (ESS). In order to build a reliable and efficient ESS system, a cylindrical lithium-ion cell is the most prominent choice since it has good energy density and favourable charging and discharging properties. Arrays of lithium-ion cells are connected in series and parallel to build the hig
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40

Martyniuk, Mariusz. "Low-temperature micro-opto-electro-mechanical technologies for temperature sensitive substrates." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0042.

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[Truncated abstract] The salient feature of next generation infrared (IR) on-chip integrated sensors is likely to be sensitivity in a narrow wavelength band that is tuneable over a selected range of the IR spectrum. It is proposed that this can be achieved by the integration of present-day HgCdTe IR detectors with thin-film based microelectro- mechanical systems (MEMS) optical mirror technology. Narrow-band sensitivity is obtained by optical resonance phenomena within a Fabry-Perot (FP) cavity, that is created by two Bragg reflectors and is monolithically integrated with an HgCdTe IR detector.
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41

Sheng, Lan. "Fuzzy logic controller synthesis for electro-mechanical systems with nonlinear friction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0001/MQ35526.pdf.

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42

Torabzadeh-Tari, Mohsen. "Analysis of Electro-mechanical actuator systems in more electric aircraft applications /." Stockholm : Department of electrical engineering, Royal Institute of Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255.

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43

Ali, S. Z. "Electro-thermo-mechanical study of membrane devices for smart IC technologies." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.595441.

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Silicon on Insulator membranes are increasingly finding applications in many semiconductor devices and circuits. This thesis studies thermal and mechanical behaviour of two very different membrane based devices: Smart Gas Sensors and Membrane Power Devices. Both the devices are CMOS compatible and can easily be integrated with circuitry in a smart IC. The same fabrication process has been used for both these devices – a standard SOI CMOS process, followed by Deep Reactive Ion Etching (DRIE). Gas sensors need to micro-hotplate to heat the sensing material for better sensitivity and faster respo
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44

Li, Lijie. "Microactuators and their application in micro-opto-electro-mechanical systems (MOEMS)." Thesis, University of Strathclyde, 2004. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21529.

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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 drive actuators, thermal actuators, and comb drive actuators have separately been characterized, improved, and modified in this thesis. Asymmetric thermal actuators are current driven actuators that can generate relatively high force and can be operated bi-directionally. We have designed a novel struc
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45

Atyia, Thamir Hassan. "General simulation and design tools for control of electro-mechanical systems." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273364.

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46

Pérez, Arancibia Néstor Osvaldo. "Adaptive control of opto-electro-mechanical systems for broadband disturbance rejection." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1495961871&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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47

Unamuno, Anartz. "Hybrid micro-opto-electro-mechanical systems (MOEMS) based on electrothermal microactuation." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501835.

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48

Xue, Linfeng. "Theoretical Characterization of Internal Resonance in Micro-Electro-Mechanical Systems (MEMS)." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1593296130150349.

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49

Ospanov, Asset. "DELAY DIFFERENTIAL EQUATIONS AND THEIR APPLICATION TO MICRO ELECTRO MECHANICAL SYSTEMS." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5674.

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Delay differential equations have a wide range of applications in engineering. This work is devoted to the analysis of delay Duffing equation, which plays a crucial role in modeling performance on demand Micro Electro Mechanical Systems (MEMS). We start with the stability analysis of a linear delay model. We also show that in certain cases the delay model can be efficiently approximated with a much simpler model without delay. We proceed with the analysis of a non-linear Duffing equation. This model is a significantly more complex mathematical model. For instance, the existence of a periodic s
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50

Shui, Fang. "Study of an electro-mechanical-pnuematic (master-slave) motion control system." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1202240228.

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