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Thematische Bibliographien / Speed and position regulation / Dissertationen

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Dissertationen zum Thema „Speed and position regulation“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Soviš, Jiří. "Bezsnímačové řízení střídavých motorů na platformě STM32." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442463.

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The thesis is focused on the issue of sensorless vector control of a synchronous motor with permanent magnets in the low-speed range. In the first part, there is a brief description of the synchronous motor and the necessary transformations for the application of vector control. This is followed by the overview of sensorless methods for position estimation by injecting a high-frequency harmonic signal. The practical part is devoted to the implementation of a control algorithm to develop kit STM32NUCLEO-L476RG, which is preceded by the identification of all engine parameters. As part of the imp

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2

Cilia, Joseph. "Sensorless speed and position control of induction motor drives." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362888.

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3

Östling, Johan. "High Accuracy Speed and Angular Position Detection by Dual Sensor." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-365726.

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For many decades there has been a need in many industries to measure speed and position of ferrous gears. This is commonly done by converting passing gear teeth from trigger wheels to electrical impulses to calculate speed and angular position. By using Hall effect sensors or Giant Magnetoresistance sensors (GMR), a zero speed detection of gear teeth is possible while at the same time be cheap to produce and durable for harsh environments. A specially designed trigger-wheel (cogwheel created for measurements) with gear teeth in a specific pattern, exact position can be detected by using a dual

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4

Budden, Alan Stephen. "Sensorless zero-speed position detection for brushless permanent magnet machines." Thesis, University of Bristol, 2006. http://hdl.handle.net/1983/05c6fe86-20a7-4a40-b39d-4f62d0c774a7.

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5

Roskilly, Kyle. "Sensor augmentation of GPS for position and speed sensing in animal locomotion." Thesis, Royal Veterinary College (University of London), 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.669198.

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6

Chi, Song. "Position-sensorless control of permanent magnet synchronous machines over wide speed range." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1186974583.

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7

Rao, Niankun. "A novel high-speed stereo-vision system for real-time position sensing." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39637.

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Real-time position sensing has a wide range of applications in motion control systems, parts inspection and general metrology. Vision-based position sensing systems have signiﬁcant advantages over other sensing methods, including large measurement volume, non-contact sensing, and simultaneous mea- surement in multiple degrees-of-freedom (DOF). Existing vision-based position sensing solutions are limited by low sampling frequency and low position accuracy. This thesis presents the theory, design, implementation and calibration of a new high-speed stereo-vision camera system for real-time positi

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8

Chretien, Ludovic. "POSITION SENSORLESS CONTROL OF NON-SALIENT PERMANENT MAGNET SYNCHRONOUS MACHINE." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145286531.

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9

Chan, Leon Y. (Leon Yen-Lee). "Mechanisms of regulation of the spindle position checkpoint kinase, Kin4." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/58197.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Most cells are polarized in that they are aware of spatial cues and can respond to these cues accordingly. One major aspect of cell function that is often responsive to these polarization cues is cell division. Cell division, the process of making two cells from one progenitor, requires equal distribution of the genetic material to the two progeny cells. When polarized cells divide, an additional constraint on the segregation of the

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10

Myers, Paul G. "A two-dimensional spoiler of arbitrary chordwise position in a low speed flow." Thesis, University of Bristol, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303755.

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11

Winter, Alexei Ivan. "Speed regulation for tidal turbines : a new control concept." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723430.

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12

Alamaa, Angelica. "High-speed railway embankments : a comparison of different regulation." Thesis, KTH, Jord- och bergmekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198074.

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Swedish transport administration initiated this Master Thesis project and the aim was to compare regulations for the design of high-speed railways from three European countries: France, Germany and Spain. The reason why this is of interest for the Swedish transport administration is the design of the first Swedish high-speed railway, called Ostlänken. Therefore, a literature study of the regulations and other literature regarding high-speed railway has been carried out. A basic description of railway components, slab track and ballasted tracks is presented. Ballasted embankments usually consis

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13

Keysan, Ozan. "A Non-invasive Speed And Position Sensor For Induction Machines Using External Search Coils." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610290/index.pdf.

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In industrial drives market, speed and position estimation are one of the most important subjects for accurate motor drives. Vector controlled drives has the best dynamic performance among AC motor drives. Sensorless vector control is one of the most studied one. However, sensorless drive systems fail at low or zero speeds and may not have enough accuracy. For better accuracy and speed range speed sensors or position encoders are usually essential. However, coupling of sensor and sensor prices introduces extra cost on the drive. Thus in order to reduce the cost of the drive a cheap and easy to

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14

Irigoyen, Eizmendi Javier. "Commande en position et force d'un robot manipulateur d'assemblage." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598444q.

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15

Gogas, Kyriakos. "Design of a robust speed and position sensorless decoupled P-Q controlled doubly-fed induction generator for variable-speed wind energy applications." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99762.

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Wind energy is a relatively young but rapidly expanding industry. In order for wind generation to be cost effective, it must produce energy at a minimum cost per dollar of investment. Performance characteristics such as power output versus wind speed must be optimized in order to compete with other energy sources. Also, if the utility uses wind power for a part of its generation, the output power of these turbines must have the same high quality and reliability when it enters the utility grid. The ability to vary operating speed is important in wind generation because it allows for an optimiza

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Vickery, John Lawrence. "AN INTELLIGENT DIFFERENCING GLOBAL POSITIONING SYSTEM UTILIZING DIFFERENTIAL DOPPLER TO DETERMINE POSITION AND SPEED ACCURATELY." MSSTATE, 2002. http://sun.library.msstate.edu/ETD-db/theses/available/etd-03012002-121541/.

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It is not where in the world you are that matters. It is where you are with respect to a reference point whether on land or at sea. That is the basis behind Differencing GPS. Utilizing the carrier wave and Gold Code (GC) signal transmitted by GPS satellites, this project uses two GPS receivers and a system integration manager utilizing neural networks and expert systems to determine a user position and speed relative to a fixed point on earth. Two methods of determining the user position are employed: classic triangulation and measuring the difference in the Doppler shift of the carrier wave b

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17

Bu, Jianrong. "High performance rotor position sensorless control of switched reluctance machines over a wide speed range /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949836205613.

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18

Zhuan, Xiangtao. "Optimal handling and fault-tolerant speed regulation of heavy haul trains." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-07212007-131319.

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19

Lee, Jae Ryong. "Microprocessor-based soft variable structure control for D.C. motor speed regulation." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50045.

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The theory of soft variable structure control, which produces robustness to parameter variation and fast transient response, is discussed in this thesis. The digital implementation techniques are presented in the aspects of sample rate, prefilter design, hardware selection, and microprocessor arithmetic operation. Simulation and experimental results showed good performance in negative speed range, but this controller created unwanted high armature current fluctuation in positive speed range. The reasons turned out to be the limitation of sample rate, noise from the tachometer, and high gain

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20

Mehta, Urmish R. "Optimal control of a high speed overhead crane including hoisting." Ohio : Ohio University, 1992. http://www.ohiolink.edu/etd/view.cgi?ohiou1172863064.

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21

MERLINI, LAURA. "Cell cycle regulation of septins: implications for cytokinesis and the spindle position checkpoint." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19955.

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In most eukaryotic cells, cytokinesis is driven by a contractile actomyosin ring, which forms at the site of cell division and drives furrow ingression. In metazoans and fungi cytokinesis requires also other cytoskeletal proteins called septins. Septins are evolutionarily conserved proteins that can hydrolyse GTP and form polymers that assemble into higher order structures, such as filaments and rings. They can interact both with the actin and microtubule cytoskeleton and with membranes. Besides being involved in cytokinesis, septins are involved in many other functions, such as polarized grow

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22

Boukas, Theocharis K. "Exact feedback linearization with state derivative feedback for high-performance field-oriented induction motor speed/position control." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/14890.

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23

Faggion, Adriano. "Algorithms and Rotor Designs for the Position Estimation of PM Synchronous motors at Zero and Nonzero Speed." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3427488.

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This thesis deals with the estimation algorithms, reassuming in detail the principles commons techniques and testing them in simulation and by experimentation. The following estimator typologies are discussed: MRAS estimator in the high speed region, estimator based on the high frequency injection signals in the low and zero speed region. As regards the MRAS estimator, after its description, a particular application that exploits this estimation solution is presented. Then, a sensorless control of a Permanent Magnet synchronous motor drive for a hybrid electric catamaran is reported. A Surfa

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24

Webster, Courtney Ann. "Effects of Running Speed, Fatigue, and Bracing on Motor Control of Chronically Unstable Ankles." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23733.

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Ankle sprains are among the most common injuries for participants in running and jumping sports. Following an initial sprain injury, many (30-40%) will develop chronic ankle instability (CAI), characterized by a perception of instability and repeated sprain injuries. Quasi-static test methods indicate poor postural stability and joint position sense (JPS) as associated motor control deficits. Little research, though, has investigated ankle motor control under dynamic (simulated sport) or fatigue conditions. To better understand factors contributing to the increased sprain rate in adults with C

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25

Page, Karen Mary. "Mathematical models in embryology : the selection, regulation and speed of formation of patterns." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302119.

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26

Bennett, April M. "Active Regulation of Speed During a Simulated Low-altitude Flight Task: Altitude Matters!" Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1167238078.

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27

Ofori, Ernest. "A Pulse Injection Based Sensorless Position Estimation Method for a Switched Reluctance Motor over a Wide Speed Range." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1403130339.

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28

Festenstein, Richard. "Molecular analysis of the human CD2 Locus Control Region in transgenic mice." Thesis, Open University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321311.

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29

Meadows, John Ceil. "Regulation of mitotic progression by factors that influence spindle position and stability in fission yeast." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1444825/.

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It has previously been proposed that in fission yeast mitotic spindle position is monitored by a checkpoint that controls the timing of anaphase onset. This checkpoint is activated by treatment of cells with Latrunculin A (Lat A), an inhibitor of actin polymerisation. It was previously thought that Lat A imposes an anaphase delay by preventing interaction of astral microtubules with the cortical actin cytoskeleton and that this interaction was required for correct spindle orientation. By contrast I show that cells lacking Mto1, a centrosomin-like protein, have mis-orientated spindles but are n

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30

March, Philip. "Robust anti-windup control and its application to permanent magnet synchronous motor speed regulation." Thesis, University of Leicester, 2009. http://hdl.handle.net/2381/27563.

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This thesis is concerned with the design of anti-windup compensators and similar augmentations to electronic control systems that aid the system to cope with isolated nonlinearities within the closed loop such as actuator saturation. The thesis builds on theoretical contributions in the literature regarding the synthesis of low order dynamic anti-windup compensators by presenting a successful industrial application of these techniques. A range of other anti-windup techniques are described and through simulation and mathematical analysis, the pros and cons of these designs are presented. Some s

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31

Becker, Jeremie Francois Claude. "Determinants of nucleosome organisation and transcription regulation by histone marks." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:b91fc973-2eb5-4e76-b6d5-ddaed1449a68.

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Epigenetics is the study of heritable changes in gene expression that do not involve changes in the underlying DNA sequence. Epigenetic pathways appeared in eukaryotes where multicellular organisms differentiate into different cell types, associated with different phenotypes. The differentiation process is achieved by modifications of the chromatin structure which, by altering the access of trans-factors to the DNA, result in gene activation and repression. Epigenetic mechanisms are therefore viewed as an "extra" layer of information that modulate the genetic information in time and space, nec

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Sutter, Nathaniel Barrett. "Suppression of stable and variegating position effects by the 5'HS2 and inducible 3MRE enhancers /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/5038.

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33

Corrales, Berjano Marc 1984. "Text in context : Chromatin effects in gene regulation." Doctoral thesis, Universitat Pompeu Fabra, 2018. http://hdl.handle.net/10803/565719.

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This thesis reports the study of chromatin composition and conformation on the expression of integrated reporters at thousands of genomic locations in the Drosophila genome. We have adapted and improved a technology (Thousands of Reporters Integrated in Parallel TRIP) to randomly integrate barcoded reporters allowing us to measure the context effects on transcription at ~80.000 different loci. We have focused on housekeeping promoter-reporters due to their relative autonomy from distal regulatory elements. Taking advantage of published genome-wide localization maps of chromatin protein and hi

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Messali, Amir. "Contribution to Rotor Position and Speed Estimation for Synchronous Machine Drive Using High Frequency Voltage Injection : Application to EV/HEV Powertrains." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0048.

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Cette thèse s’inscrit dans le cadre de la chaire Renault/Centrale Nantes sur l’amélioration des performances des véhicules électriques (EV/HEV). Elle est dédiée à la problématique de l’estimation de la position/vitesse des moteurs synchrones à aimants permanents (MSAP) sans capteur mécanique, en utilisant les techniques d’injection de signaux haute fréquence (HF) sur toute la plage de vitesse des MSAP. Dans ce cadre, plusieurs contributions ont été proposées dans les parties de démodulation/traitement du signal et d’algorithmes de poursuite des techniques d’injection HF, afin d’améliorer l’est

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Zuleta, Ignacio. "A high speed mass spectrometer based on micromachined ion optics and position sensitve detection for the monitoring of non-stationary processes /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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36

Elkhomri, Othman. "DSP IMPLEMENTATION OF DC VOLTAGE REGULATION USING ADAPTIVE CONTROL FOR 200 KW 62000 RPM INDUCTION GENERAT." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2926.

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The thesis discusses the development of closed loop system to control the DC voltage for 200 kW induction generator rated at a speed of 62000 RPM under different load conditions. The voltage regulation has been implemented using PI controller. A gain scheduling control algorithm has been developed to select the appropriate controller gains with respect to the generator load. Further, a relationship between the generator loads and the controller gains has been established. This relationship has been modeled using adaptive control technique to vary the gains automatically at any load condition.

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Reinikka, Ritva Sinikka. "Credibility, speculation and the speed of trade liberalization with an application to Kenya." Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:8f156602-ac18-4d54-b6be-cd7b372af38b.

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This thesis studies the causes and consequences of the credibility problem in trade liberalization, with a special reference to African economies. The two necessary conditions for credibility are found to be macroeconomic compatibility and time-consistency, while the sufficient conditions are more difficult to identify. A lack of credibility is typically probabilistic as private agents may be uncertain about the government's intentions, or the future terms of trade. The first part of the thesis develops a theory of economic behaviour in the absence of credibility. Due to private responses, inc

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Lalonde-Parsi, Marie-Jasmine. "Perception of self-motion & regulation of walking speed in older adults in comparison to young adults." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117015.

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Older adults display slower walking speeds, which could be attributed to an altered perception of optic flow (OF) speed. It has been previously demonstrated that older adults exhibit altered speed discriminations when exposed to expanding OFs. Whether these perceptual impairments explain slower and less context-adapted gait speeds in older adults remains unknown. The purpose of this study was to contrast speed discrimination thresholds and gait speed adaptations in young-old vs. younger adults. I also sought to determine whether speed discrimination and walking speed modulation abilities were

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Reif, Angela. "Self Regulatory Depletion Effects On Speed Within A Complex Speech Processing Task." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1400183863.

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40

Townshend, Andrew Douglas. "The modulation of outdoor running speed : the influence of gradient." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/35748/1/Andrew_Townshend_Thesis.pdf.

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This thesis aimed to investigate the way in which distance runners modulate their speed in an effort to understand the key processes and determinants of speed selection when encountering hills in natural outdoor environments. One factor which has limited the expansion of knowledge in this area has been a reliance on the motorized treadmill which constrains runners to constant speeds and gradients and only linear paths. Conversely, limits in the portability or storage capacity of available technology have restricted field research to brief durations and level courses. Therefore another aim of t

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Vujacic, Sanja. "Régulation des relations interétatiques en position de dépendance : Étude du cas de la Croatie." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV103/document.

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Dans cette thèse, nous avons cherché à mimer la gouvernance du système de régulation des relations interétatiques de l’Espace croate, dans le respect des propriétés structurelles des systèmes sociaux adaptatifs régis par les lois naturelles, en particulier les principes d’auto-organisation et de complexité. La modélisation de l’organisation des relations interétatiques dans l’Espace croate nous a permis d’étudier la complexité de la gouvernance qui est en jeu entre les parties et le tout, dans les interactions entre trois niveaux de régulation (national, régional, international). Elle nous a a

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Goksu, Omer. "Shaft Transducerless Vector Control Of The Interior Permanent Magnet Motor With Speed And Position Estimation Using High Frequency Signal Injection And Flux Observer Methods." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609617/index.pdf.

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In this thesis, shaft transducerless vector control of Interior Permanent Magnet (IPM) motor with speed and position estimation using saliency based high frequency signal injection and fundamental model based flux observer methods will be investigated. The magnetic saliency characteristic of a 2.2-kW IPM motor will be experimentally extracted by means of high frequency signal injection. High frequency signal injection method will be used to estimate the speed and position at zero and low speed based on the magnetic saliency of the IPM motor. At high speed, fundamental model based flux observer

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43

Villet, Wikus Theo. "Critical evaluation and application of position sensorless control techniques for reluctance synchronous machines." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86527.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The position sensorless controllability of the reluctance synchronous machine (RSM) is investigated in this thesis with the focus on industry applications where variable and dynamic torque is required from startup up to rated speed. Two low speed as well as one medium to high speed position sensorless control (PSC) method for RSMs are investigated. These methods are extended to operate in the entire rated speed region with a hybrid PSC structure that makes use of phase locked-loop synchronisation and a hysteresis changeover

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Bouwer, Pieter. "Modelling, design and implementation of a small-scale, position sensorless, variable speed wind energy conversion system incorporating DTC-SVM of a PMSG drive with RLC filter." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80242.

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Thesis (MScEng)--Stellenbosch University, 2013.<br>Wind energy has proven to be a viable source of clean energy, and the worldwide demand is growing rapidly. Variable speed topologies, with synchronous generators and full-scale converters, are becoming more popular, and the e ective control of these systems is a current trend in wind energy research. The purpose of this study is the modelling, design, simulation and implementation of a small-scale, variable speed wind energy conversion system, incorporating the position sensorless direct torque control with space vector modulation, of a

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Liu, Zhen. "Reconstruction and Control of Tip Position and Dynamic Sensing of Interaction Force for Micro-Cantilever to Enable High Speed and High Resolution Dynamic Atomic Force Microscopy." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483629656167247.

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46

Xu, Li-Qing, and 許立慶. "Position regulation and speed control of a rotating beam via variable structure control." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/51689175475671076130.

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碩士<br>中原大學<br>機械工程研究所<br>86<br>This paper presents the vibration control of the flexible rotating beam with a tip mass. Modeling and control of a flexible rotating beam has received a great deal of attention. When a tip mass of a flexible beam is a rigid body, not only bending vibration but also torsional vibration will occur. In this paper, the bending and torsion vibrations and rigid-body motion are governed by the nonlinear coupled partial differential equations associated with a set of nonlinear boundary conditions. The coupling provides the opportunity to suppress the flexible vibration b

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Wen-HongLi and 李文宏. "Design and Implementation of a Position Sensorless IPMSM Drive with Characteristics of Wide Range of Speed Regulation and Reliable Start-up." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/zq9x5u.

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碩士<br>國立成功大學<br>電機工程學系<br>103<br>This thesis aims at developing a permanent magnet synchronous motor (PMSM) drive for starting up a PMSM motor without using any position sensor. The technology developed in this thesis is composed of three different methods: the first one is the high-frequency pulse voltage signal estimation method; the second one is the high-frequency voltage signal injection method for the low-speed zone; and the last one is the sliding mode current control method, which is implemented by using a sliding mode current observer, for the medium-speed zone and the high-speed zone

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Shafeeq, K. Mohamed. "Position Sensorless Speed Control of Brushless DC Motor." Thesis, 2018. http://ethesis.nitrkl.ac.in/9889/1/2018_MT_216EE5316_MShafeeq_K_Position_.pdf.

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This project work presents the position sensor less speed control of brushless DC motor, brushless DC motors has the similar speed and torque characteristics of conventional DC motors, instead of commutating brushes brushless DC motor uses an electronic commutation system. To obtain the commutation instants the position of permanent magnet rotor position should detect, normally we use a position sensor to detect the position. instead of using the position sensor to detect the rotor position here in this project we are using the zero crossing instances of the back EMF to get commutation instanc

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Huang, I.-Chun, and 黃宜君. "Effects of Speed and Position on Dynamic Shoulder Strength." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/77977045780974641598.

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碩士<br>國立成功大學<br>醫學工程研究所<br>88<br>The purpose of this study was to determine the effects of speed, test plane, and humerus position on peak torque values produced by shoulder elevators, depressors, internal and external rotators during concentric and eccentric contraction in young and healthy adults. Absolute peak torque value was calculated by multiplying the maximal force of constant velocity phase by the perpendicular distance from the axis of rotation to the pad. The constant velocity phase was defined the period with the speed between 90% and 110% of the testing velocity. 120 he

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Chang, Wei-Yau, and 張維堯. "Brushless DC Motor Control Without Position and Speed Sensors." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/22123435011943354200.

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碩士<br>國立清華大學<br>動力機械學系<br>84<br>The thesis forcuses on sensorless design and speedontrol of brushless DC motor. The operation of brushless DCotor relies on position sensors to detect the rotor magneticole position, and then the proper commutation signal can bebtained. Besides, the speed sensor is needed to constituteor speed feedback loop. The first part of the thesis is totudy the sensorless algorithm to replace position and speedensors of motor. The second part is to apply digital phase-o

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