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Dissertations / Theses on the topic 'Angular rate'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Watson, Vincent C. "Angular rate estimation by multiplicative Kalman filtering techniques." Thesis, Monterey, Calif. : Naval Postgraduate School, 2003. http://handle.dtic.mil/100.2/ADA420668.

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Thesis (M.S. in Astronautical Engineering)--Naval Postgraduate School, December 2003.<br>"December 2003". Thesis advisor(s): Cristi, Roberto ; Agrawal, Brij. Includes bibliographical references (p. 53). Also available online.

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John, James Daniel, and james d. john@gmail com. "An Adaptively Controlled MEMS Triaxial Angular Rate Sensor." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070112.162019.

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Prohibitive cost and large size of conventional angular rate sensors have limited their use to large scale aeronautical applications. However, the emergence of MEMS technology in the last two decades has enabled angular rate sensors to be fabricated that are orders of magnitude smaller in size and in cost. The reduction in size and cost has subsequently encouraged new applications to emerge, but the accuracy and resolution of MEMS angular rate sensors will have to be greatly improved before they can be successfully utilised for such high end applications as inertial navigation. M

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3

Osborn, Christopher Scott 1979. "Gyroscope angular rate processing across asynchronous clock domains." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/87278.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.<br>Includes bibliographical references (p. 85-86).<br>by Christopher Scott Osborn.<br>M.Eng.

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4

Patil, Nishad. "Design And Analysis Of MEMS Angular Rate Sensors." Thesis, Indian Institute of Science, 2006. http://etd.iisc.ac.in/handle/2005/439.

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Design and analysis of polysilicon and single crystal silicon gyroscopes have been carried out. Variations in suspension design have been explored. Designs that utilize in-plane and out-of-plane sensing are studied. Damping plays an important role in determining the sense response. Reduction in damping directly aﬀects sensor performance. The various damping mechanisms that are prevalent in gyroscopes are studied. Perforations on the proof mass are observed to significantly reduce the damping in the device when operated in air. The eﬀects of perforation geometry and density have been analyzed.

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5

Patil, Nishad. "Design And Analysis Of MEMS Angular Rate Sensors." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/291.

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Design and analysis of polysilicon and single crystal silicon gyroscopes have been carried out. Variations in suspension design have been explored. Designs that utilize in-plane and out-of-plane sensing are studied. Damping plays an important role in determining the sense response. Reduction in damping directly affects sensor performance. The various damping mechanisms that are prevalent in gyroscopes are studied. Perforations on the proof mass are observed to significantly reduce the damping in the device when operated in air. The effects of perforation geometry and density have been analyz

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6

Patil, Nishad. "Design And Analysis Of MEMS Angular Rate Sensors." Thesis, Indian Institute of Science, 2006. https://etd.iisc.ac.in/handle/2005/291.

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Design and analysis of polysilicon and single crystal silicon gyroscopes have been carried out. Variations in suspension design have been explored. Designs that utilize in-plane and out-of-plane sensing are studied. Damping plays an important role in determining the sense response. Reduction in damping directly affects sensor performance. The various damping mechanisms that are prevalent in gyroscopes are studied. Perforations on the proof mass are observed to significantly reduce the damping in the device when operated in air. The effects of perforation geometry and density have been ana

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7

Palermo, William J. "Angular rate estimation for multi-body spacecraft attitude control." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA392077.

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Thesis (M.S. in Astronautical Engineering and Aeronautical and Astronautical Engineer) Naval Postgraduate School, June 2001.<br>Thesis advisor(s): Agrawal, Brij N. "June 2001." Includes bibliographical references (p. 109-110). Also available in print.

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8

Wilson, Michael J. "Nonlinear projectile attitude estimation with magnetometers and angular rate sensors." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 37 p, 2006. http://proquest.umi.com/pqdweb?did=1163250861&sid=2&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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9

Nikpour, Behrouz. "A micromachined silicon vibrating-beam angular rate sensor : a design and implementation study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/NQ40318.pdf.

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10

Ghoussayni, Salim. "Application of angular rate gyroscopes as sensors in electrical orthoses for foot drop correction." Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/673/.

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11

Saliaris, Ioannis R. "Real-Time data acquisition and processing of the Magnetic, Angular Rate and Gravity (MARG) sensor /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FSaliaris.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Systems Engineering)--Naval Postgraduate School, June 2004.<br>Thesis advisor(s): Xiaoping Yun. Includes bibliographical references (p. 59-60). Also available online.

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Mulders, Gijs D., Ilaria Pascucci, Carlo F. Manara, Leonardo Testi, Gregory J. Herczeg, Thomas Henning, Subhanjoy Mohanty, and Giuseppe Lodato. "Constraints from Dust Mass and Mass Accretion Rate Measurements on Angular Momentum Transport in Protoplanetary Disks." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626047.

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In this paper, we investigate the relation between disk mass and mass accretion rate to constrain the mechanism of angular momentum transport in protoplanetary disks. We find a correlation between dust disk mass and mass accretion rate in Chamaeleon I with a slope that is close to linear, similar to the one recently identified in Lupus. We investigate the effect of stellar mass and find that the intrinsic scatter around the best-fit M-dust-M star and M-acc-M star relations is uncorrelated. We simulate synthetic observations of an ensemble of evolving disks using a Monte Carlo approach and find

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13

Moser, David. "Application of angular rate gyroscopes for the analysis of swing phase control in transfemoral amputee gait." Thesis, University of Surrey, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493049.

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Microprocessor controlled knee prostheses require expertise and programming skill to setup the swing phase damping performance for different walking speeds. There is a lack of suitable sensing and analysis means to quantify control performance and assist the setup process thereby hindering the development of self-optimizing prostheses. In this project the application of miniature gyroscopes was explored as a means to quantify the swing phase control of transfemoral (TF) amputees. The stride-to-stride repeatability of locomotion and the timing and coordination of knee segment motions were inves

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Maurer, Michael [Verfasser], and Yiannos [Akademischer Betreuer] Manoli. "System dimensioning, digital postprocessing, and nonideality control for electromechanical Delta-Sigma-Modulator based Angular Rate Detection." Freiburg : Universität, 2018. http://d-nb.info/1167159624/34.

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15

Marinho, Diego de Freitas. "Calibração de um sistema de determinação de atitude com múltiplos sensores MARG (Magnetic, Angular Rate and Gravity)." Universidade Estadual de Londrina. Centro de Tecnologia e Urbanismo. Programa de Pós-Graduação em Engenharia Elétrica, 2017. http://www.bibliotecadigital.uel.br/document/?code=vtls000215309.

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O principal instrumento utilizado neste trabalho foi a Experiência MEMS (e- MEMS), que consiste de quatro conjunto de sensores organizados em uma estrutura tetraédrica, onde cada conjunto é composto por um acelerômetro de três eixos, um magnetômetro de três eixos, um girômetro de um eixo e um sensor de temperatura (o conjunto de acelerômetros, magnetômetros e girômetros será denominado de sensores MARG). Devido a distribuição dos conjuntos de sensores em uma estrutura tetraédrica, podem ser definidos cinco sistemas de coordenadas, quatro deles nos conjuntos de sensores e um na base da e-MEMS.

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Sha, Zhanxin. "Kinetic and Kinematic Properties of D-I Male Sprinters." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2468.

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The purpose of the study was to explore and determine kinetic and kinematic variables that related to D-I male sprinters maximal running velocity performance. The current study was separated into 3 individual chapters: 1.) Kinematic analysis magnitude of acceleration for braking and propulsion phases during foot contact phase at maximal speed sprinting; 2.) Using kinetic isometric mid-thigh pull variables to predict D-I male sprinters’ 60m performance; 3.) Relationship of whole and lower body angular momentum cancellation during terminal swing phase to sprint performance. Methods: for sprint m

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Huculak, Robert D. "Evaluating spatial orientation and position of an ATD head using accelerometers and angular rate sensors in dynamic impact testing." Thesis, Wichita State University, 2011. http://hdl.handle.net/10057/5045.

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Using three linear accelerometers and three angular rate sensors arranged to measure local acceleration in the X, Y, and Z directions and angular velocity about those axes, it is possible to calculate spatial orientation and position in a global coordinate system. The intent of this thesis is to use this calculation to provide the head trajectory of an Anthropomorphic Test Device (ATD) to supplement or replace photometric analysis. This thesis examines the various parameters of the calculations of the spatial orientation and position to determine the most accurate and efficient method. Using t

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18

Aditya, Pradyumna. "Leaky Wave Antenna." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1473414587856344.

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19

Magnis, Lionel. "Estimation de vitesse de rotation par mesures de direction." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0039/document.

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Cette thèse étudie l’estimation de vitesse de rotation d’un corps rigide à partir de mesures de directions (par exemple champ magnétique, direction du soleil) embarquées. L’objectif est de remplacer les gyromètres qui sont chers comparés aux autres capteurs inertiels et sujets à des saturations et à des dysfonctionnements. Dans une première partie de la thèse, on traite les cas spécifiques d’une rotation à axe fixe ou légèrement variable. Dans une seconde partie, on traite le cas d’une rotation quelconque par un observateur asymptotique non-linéaire. On construit l’observateur à partir de mesu

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20

Alper, Said Emre. "Mems Gyroscopes For Tactical-grade Inertial Measurement Applications." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606483/index.pdf.

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This thesis reports the development of high-performance symmetric and decoupled micromachined gyroscopes for tactical-grade inertial measurement applications. The symmetric structure allows easy matching of the resonance frequencies of the drive and sense modes of the gyroscopes for achieving high angular rate sensitivity<br>while the decoupled drive and sense modes minimizes mechanical cross-coupling for low-noise and stable operation. Three different and new symmetric and decoupled gyroscope structures with unique features are presented. These structures are fabricated in four different micr

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21

Pinto, Stephanie Santana. "Comparação das respostas cardiorrespiratórias, neuromusculares e cinemáticas de um exercício de hidroginástica executado em diferentes cadências com e sem equipamento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17694.

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O objetivo do presente estudo foi comparar as respostas cardiorrespiratórias, neuromusculares e cinemáticas durante o exercício de corrida estacionária com a flexão e extensão de cotovelo em diferentes cadências com e sem equipamento. A amostra desse estudo foi composta por 15 mulheres jovens que realizaram o exercício nas situações sem equipamento (SEM), com equipamento flutuante em ambos os membros (FLU-MSs/MIs) e com equipamento resistivo em ambos os membros (RES-MSs/MIs), nas cadências de 80 bpm, 100 bpm e no máximo esforço. Para as cadências submáximas o exercício foi realizado durante 4

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22

Cookson, Jeremy L. "A method for testing the dynamic accuracy of Microelectro-Mechanical Systems (MEMS) Magnetic, Angular Rate, and Gravity (MARG) sensors for Inertial Navigation Systems (INS) and human motion tracking applications." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FCookson.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 2010.<br>Thesis Advisor(s): Yun, Xiaoping ; Second Reader: Romano, Marcello. "June 2010." Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: micro-electro-mechanical systems, MEMS, magnetic, angular rate, gravity sensor, MARG sensors, inertial navigation system, INS, inertial test, MicroStrain, 3DM-GX1, 3DMGX3, CompactRIO, MATLAB GUI, dynamic accuracy test. Includes bibliographical references (p. 187-189). Also available in print.

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Alberton, Cristine Lima. "Respostas cardiorrespiratórias e neuromusculares da corrida estacionária em diferentes cadências nos meios aquático e terrestre." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/11315.

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O objetivo do presente estudo foi analisar as respostas cardiorrespiratórias, cinemáticas e neuromusculares de mulheres jovens realizando o exercício de corrida estacionária em diferentes cadências nos meios aquático e terrestre. Doze mulheres jovens, experientes na prática de hidroginástica, foram amostras voluntárias do estudo. Cada uma participou de duas sessões experimentais: 1) coleta dos dados de caracterização da amostra e realização de um teste de esforço máximo; 2) coleta das variáveis cardiorrespiratórias (freqüência cardíaca (FC), consumo de oxigênio (VO2), percentual da FC máxima (

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24

Gugel, Denis. "Ordnungsreduktion in der Mikrosystemtechnik." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201001091.

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Die vorliegende Arbeit befasst sich mit der Methode der modalen Superposition als Ordnungsreduktionsverfahren in der Mikrosystemtechnik. Typische Anwendungsgebiete sind Inertialsensoren und dabei im Besonderen Drehratensensoren, für die die Simulation von zeitabhängigen Phänomenen von entscheidender Bedeutung ist. Im Rahmen der Weiterentwicklung der Ordnungsreduktion nach der Methode der modalen Superposition ist es gelungen für typische lineare Kräfte eine auf analytischen Gleichungen basierende Beschreibung im reduzierten Raum zu finden. Für die Beschreibung von nichtlinearen Kräften ist im

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Sahin, Emre. "High Performance Readout And Control Electronics For Mems Gyroscopes." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610386/index.pdf.

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This thesis reports the development of various high performance readout and control electronics for implementing angular rate sensing systems using MEMS gyroscopes developed at METU. First, three systems with open loop sensing mechanisms are implemented, where each system has a different drive-mode automatic gain controlled (AGC) self-oscillation loop approach, including (i) square wave driving signal with DC off-set named as OLS_SquD, (ii) sinusoidal driving signal with DC off-set named as OLS_SineD, and iii) off-resonance driving signal named as OLS_OffD. A forth system is also constructed

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Cheng, Jiqi. "A Study of Wave Propagation and Limited-Diffraction Beams for Medical Imaging." University of Toledo / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1133820434.

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Kok, Wing Hang (Ronald). "Development of a wireless MEMS inertial system for health monitoring of structures." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-11244-122741/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: angular rate; cantilever; wireless; RF; microcontroller; tilt and rotation; health monitoring; inertial sensors; MEMS. Includes bibliographical references (p. 139-145).

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Gugel, Denis. "Ordnungsreduktion in der Mikrosystemtechnik." Doctoral thesis, Der Andere Verlag, Tönning, 2008. https://monarch.qucosa.de/id/qucosa%3A19359.

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Die vorliegende Arbeit befasst sich mit der Methode der modalen Superposition als Ordnungsreduktionsverfahren in der Mikrosystemtechnik. Typische Anwendungsgebiete sind Inertialsensoren und dabei im Besonderen Drehratensensoren, für die die Simulation von zeitabhängigen Phänomenen von entscheidender Bedeutung ist. Im Rahmen der Weiterentwicklung der Ordnungsreduktion nach der Methode der modalen Superposition ist es gelungen für typische lineare Kräfte eine auf analytischen Gleichungen basierende Beschreibung im reduzierten Raum zu finden. Für die Beschreibung von nichtlinearen Kräften ist im

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Henry, Kevin Claude. "Soft Surface Roll Mechanics Parameters for Light Vehicle Rollover Accident Reconstruction." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/1436.

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Light vehicle rollover accidents on soft surfaces can be modeled assuming constant drag with linear motion equations and other engineering principles. The concept of using segment average results to evaluate roll mechanics parameters throughout a roll sequence, and specifically, segment duration to evaluate vehicle trajectory between ground impacts is developed. The trajectory model is presented, explained and compared to values obtained by analyzing digital video of rollover crash tests. Detailed film analysis procedures are developed to obtain data from rollover crash tests that are not othe

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Reece, William R. "Exploiting angular correlations in the rare decay Bd -K*0 u+u - at LHCb." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520835.

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Spagnol, Marco. "Maintenance of electrical machines: Instantaneous Angular Speed analysis." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11102.

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2013/2014<br>This research is focused on the condition monitoring of electrical machines and its long term purpose is to monitor electrical and mechanical faults at the same time, in non-stationary conditions (variable load and speed), with a single piece of hardware. The Instantaneous Angular Speed (IAS) measurement of an electrical machine is proposed and analysed in order to detect the fault development inside it. Chapter 1 introduces some basic principles about the maintenance of an electrical machine. Machine unscheduled downtimes are frequently caused by bearing faults, and rotor/stator

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Diallo, Abdoulaye Foula. "F-spin study of rare earth nuclei using F-spin multiplets and angular momentum projected intrinsic states." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186290.

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The proton-neutron Interacting-Boson Model contains both symmetric and mixed-symmetry proton-neutron boson configurations. These states of different proton-neutron symmetry can be classified in terms of an SU(2) symmetry, called F-spin. This dissertation deals with some new applications of F-spin. Even-even nuclei drawn from the proton and neutron shells 50 < Z < 82 and 82 < N < 126, respectively, are systematically classified in F-spin multiplets and their binding energies are fit with a six-parameter mass-formula. Using particle-hole symmetry conjugation, the energies of the low-lying levels

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Петренко, Олексій Володимирович. "Удосконалення методів підвищення точності вібраційного гіроскопа з металевим циліндричним резонатором". Thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/36992.

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Робота виконана на кафедрі аерокосмічних систем управління Національного авіаційного університету Міністерства освіти і науки України та у Публічному акціонерному товаристві «Науково-виробниче об’єднання «Київський завод автоматики».<br>Дисертаційна робота присвячена науковому обґрунтуванню та розробці алгоритмів компенсації внутрішніх похибок та зовнішніх збурень у Коріолісовому вібраційному гіроскопі, а також удосконаленню його складових частин (резонатора, чутливого елементу). Автором розроблено методику та обладнання для робочого місця безелектродного вимірювання динамічних параметрів ме

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BRUNDU, DAVIDE. "Radiation hardness of the upgraded LHCb muon detector electronics and prospects for a full angular analysis in multi-body rare charm decays." Doctoral thesis, Università degli Studi di Cagliari, 2020. http://hdl.handle.net/11584/284134.

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In this dissertation the results of the studies on the new readout electronics for the muon system of the LHCb experiment, and the perspectives for carrying out a full angular analysis in the rare decays D0 -> pi+ pi- mu+ mu- and D0 -> K+ K- mu+ mu- will be described. The LHCb experiment studies the heavy hadron physics, containing charm or bottom quarks, in particular searching for new Charge-Parity (CP ) symmetry violation sources, searching for rare decays and studying their properties. LHCb produced leading results in these fields so far. In order to obtain more precise measurements

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Coquereau, Samuel. "Study of the B⁰→K*⁰μ⁺μ⁻ decay with the LHCb experiment : angular analysis and measurement of the ratio RK*". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066366.

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Les désintégrations de quark b rares interviennent principalement via des courant neutres changeant la saveur, (Flavor Changing Neutral Current, FCNC en anglais). Le modèle Standard n'autorise les courants qu'au niveau des boucles. Ces processus FCNC sont sujets à une suppression de GIM conduisant à des processus rares. Par conséquent les désintégration b→s sont de très bon outils pour la recherche de phénomène de Nouvelle Physique au delà du Modèle Standard. Cette thèse présente l'analyse angulaire de la désintégration B⁰→K*⁰μ⁺μ⁻ avec l'ensemble des données collecté par l'expérience lhcb dura

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JUNQUEIRA, ASTROGILDO de C. "Estudo de interacoes hiperfinas em oxidos perovskitas do tipo La(MT)Osub(3) (MT=metais de transicao Fe, Cr, Mn e Co)." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11242.

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Made available in DSpace on 2014-10-09T12:49:51Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:04Z (GMT). No. of bitstreams: 1 09826.pdf: 5905522 bytes, checksum: b0354cc2f21014da9657b88019b2b992 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:99/07068-0

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CAVALCANTE, FABIO H. de M. "Estudo de interacoes hiperfinas em oxidos RCoOsub(3) (R=Gd e Tb) e filmes finos de HfOsub(2) por meio da tecnica de espectroscopia de correlacao angular gama-gama perturbada." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9422.

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Made available in DSpace on 2014-10-09T12:26:40Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:23Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Desse, Fabrice. "Analyse angulaire de désintégrations B⁰ →K*⁰e⁺e⁻ avec le détecteur LHCb et upgrade de l'électronique des calorimètres." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS126.

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Les courants neutres changeant la saveur de type b -> s gamma ne sont autorisés qu’au niveau des boucles dans le Modèle Standard (MS). Ils sont donc potentiellement sensibles à des effets de Nouvelle Physique (NP) intervenant dans les boucles quantiques qui pourraient se manifester via la modification de certaines observables angulaires. Dans le MS, le photon est principalement émis avec une polarisation gauche. Cependant, plusieurs théories de NP autorisent une importante contribution des courants droits. L’analyse angulaire des désintégrations B0->K*e+e- à très bas q2 (la masse invaria

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恵子, 名取, та Keiko Natori. "微細複合組織金属の変形機構および塑性加工性に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12867122/?lang=0, 2014. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12867122/?lang=0.

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ヘテロ構造組織を有する鉄・非鉄金属の組織形態に注目して,微視的構造やその挙動が巨視的現象(変形特性,成形性)として発現するメカニズムを解明することを目的とした.鉄系金属ではDual Phase型高張力鋼のスプリングバック現象のひずみ速度依存性,非鉄系金属では半凝固鋳造法と強ひずみ加工を組み合わせた亜共晶アルミニウム合金の衝撃後方押出し成形性に注目した.これらの検討によりいずれの試料においても,結晶粒界よりもスケールの大きいヘテロ構造に由来した変形機構が支配的であることが明らかになった.<br>博士(工学)<br>Doctor of Philosophy in Engineering<br>同志社大学<br>Doshisha University

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Patwari, Neal. "Measured and Modeled Time and Angle Dispersion Characteristics of the 1.8 GHz Peer-to-Peer Radio Channel." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/32201.

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In an extensive outdoor propagation study, low antenna heights of 1.7 m are used at both the transmitter and the receiver to measure over 3500 wideband power-delay profiles (PDPs) of the channel for a peer-to-peer communications system. Rural and urban areas are studied in 22 different transmitter-receiver links. The results are used to characterize the narrowband path loss, mean delay, root-mean-square (RMS) delay spread, and timing jitter of the peer-to-peer wideband channel. Small-scale fading characteristics are measured in detail by measuring and analyzing 160 PDPs within each local are

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CORREA, EDUARDO DE L. "Produção, caracterização e aplicação de nanopartículas de Gd2O3 e Er2O3 como radiossensibilizadores em feixes de Radioterapia." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/27968.

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Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2017-11-08T16:29:11Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-08T16:29:11Z (GMT). No. of bitstreams: 0<br>Nesse trabalho foram produzidas nanopartículas (NPs) de Gd2O3 e Er2O3 para aplicação como radiossensibilizadores em feixes de radioterapia. Elas foram sintetizadas no Laboratório de Interações Hiperfinas do IPEN pelo método da decomposição térmica e caracterizadas utilizando difração de raios-X, para verificar a estrutura cristalina, microscopia eletrônica de transmissão, para obter informações sobre form

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Huang, Yi-Kai, and 黃奕凱. "Initial Attitude Acquisition of Sunsynchronous Satellites Using Angular Rate Feedback." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/56233928414348288324.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>101<br>This thesis initital acquisition of sun-synchronous satellites using angular rate feedback in the separation stage control.Because the satellite and vehicles in the separation stage, the satellite will produce angular velocity caused by rolling, making the satellite can not determine the Sun, the Earth or other celestial body position, and at this stage there are restrictions on the energy, you can not use too complex control relatively energy-intensive method or sensors. Therefore, in this thesis, choose a more direct way to control the angular velocity,

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Vivek, Chandran K. P. "Development Of Gyroless Attitude And Angular Rate Estimation For Satellites." Thesis, 2009. https://etd.iisc.ac.in/handle/2005/1121.

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Studies aimed at the development of indigenous low cost star tracker and gyroless attitude and angular rate estimation is presented in the thesis. This study is required for the realization of low cost micro satellites. A target specification of determining the attitude with accuracy (3σ) of 0.05 degrees and attitude rate with accuracy (3σ) in the range of 50rad/sec at a rate of 10 samples/second in all the axes is set as a goal for the study. Different sensor arrays available in the market are evaluated on the basis of their noise characteristics, resolution of the analog-to-digital converter

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Vivek, Chandran K. P. "Development Of Gyroless Attitude And Angular Rate Estimation For Satellites." Thesis, 2009. http://hdl.handle.net/2005/1121.

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Studies aimed at the development of indigenous low cost star tracker and gyroless attitude and angular rate estimation is presented in the thesis. This study is required for the realization of low cost micro satellites. A target specification of determining the attitude with accuracy (3σ) of 0.05 degrees and attitude rate with accuracy (3σ) in the range of 50rad/sec at a rate of 10 samples/second in all the axes is set as a goal for the study. Different sensor arrays available in the market are evaluated on the basis of their noise characteristics, resolution of the analog-to-digital converter

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Burnie, Marc. "MODAL ANALYSIS OF MEMS GYROSCOPIC SENSORS." Thesis, 2010. http://hdl.handle.net/1974/5701.

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Microgyroscopes find popular applications in modern life, such as, vehicle navigation, inertial positioning, human body motion monitoring, etc. In this study, three unique MEMS gyroscopic sensors were investigated using experimental methods and finite element analysis (FEA) modelling, particularly their modal behaviour. The analytical, simulated and experimental results were compared and the discrepancy between resonant frequencies of the significant mode shapes was discussed. Three microfabricated gyroscopes were investigated: a thermally-actuated in-plane gyroscope, an electrostatically-actu

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Chuang, Ming-Chieh, and 莊明傑. "Formation and Properties of High Strain Rate Superplastic Zn-22 wt.% Al Alloy by Equal Channel Angular Extrusion." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/93747148766580559790.

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碩士<br>大同大學<br>材料工程學系(所)<br>92<br>In this study thermomechanical processings were applied to a Zn-22 wt.% Al alloy to produce fine equiaxed grain structure for the high strain rate superplasticity studies. The microstructure, hardness and superplastic properties of Zn-22 wt.% Al alloy was studied by using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), microhardness measurements and tensile tester. The results showed that the microduplex Zn-22 wt.% Al alloy specimens exhibited low temperature high strain rate (LTHS) and high temperature high strain rate (HTHS) super

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Pal, Madhumita. "Accurate and Efficient Algorithms for Star Sensor Based Micro-Satellite Attitude and Attitude Rate Estimation." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3428.

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This dissertation addresses novel techniques in determining gyroless micro-satellite attitude and attitude rate. The main objective of this thesis is to explore the possibility of using commercially available low cost micro-light star sensor as a stand-alone sensor for micro-satellite attitude as well as attitude rate determination. The objective is achieved by developing accurate and computationally efficient algorithms for the realization of onboard operation of a low fidelity star sensor. All the algorithms developed here are tested with the measurement noise presented in the catalog of the

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Pal, Madhumita. "Accurate and Efficient Algorithms for Star Sensor Based Micro-Satellite Attitude and Attitude Rate Estimation." Thesis, 2013. http://etd.iisc.ernet.in/2005/3428.

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This dissertation addresses novel techniques in determining gyroless micro-satellite attitude and attitude rate. The main objective of this thesis is to explore the possibility of using commercially available low cost micro-light star sensor as a stand-alone sensor for micro-satellite attitude as well as attitude rate determination. The objective is achieved by developing accurate and computationally efficient algorithms for the realization of onboard operation of a low fidelity star sensor. All the algorithms developed here are tested with the measurement noise presented in the catalog of the

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Sob, Peter Baonhe. "Modelling stain rate sensitive nanomaterials' mechanical properties: the effects of varying definitions." Thesis, 2016. http://hdl.handle.net/10352/332.

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M. Tech. (Mechanical Engineering, Faculty of Engineering and Technology): Vaal University of Technology<br>Presently there exist a lot of controversies about the mechanical properties of nanomaterials. Several convincing reasons and justifications have been put forward for the controversies. Some of the reasons are varying processing routes, varying ways of defining equations, varying grain sizes, varying internal constituent structures, varying techniques of imposing strain on the specimen etc. It is therefore necessary for scientists, engineers and technologists to come up with a clearer way

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Campbell, David Riley Mark A. "Angular momentum induced shape changes in the rare-earth nuclei ¹⁵², ¹⁵³Gd and ¹⁵⁹, ¹⁶⁰Yb." 2004. http://etd.lib.fsu.edu/theses/available/etd-06292004-181848.

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Thesis (Ph. D.)--Florida State University, 2004.<br>Advisor: Dr. Mark A Riley, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed Sept. 21, 2004). Includes bibliographical references.

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