Relevant bibliographies by topics / Optimal torque / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Optimal torque.

Dissertations / Theses on the topic 'Optimal torque'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Optimal torque.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Osinenko, Pavel. "Optimal slip control for tractors with feedback of drive torque." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-155357.

Full text
Abstract:
Traction efficiency of tractors barely reaches 50 % in field operations. On the other hand, modern trends in agriculture show growth of the global tractor markets and at the same time increased demands for greenhouse gas emission reduction as well as energy efficiency due to increasing fuel costs. Engine power of farm tractors is growing at 1.8 kW per year reaching today about 500 kW for the highest traction class machines. The problem of effective use of energy has become crucial. Existing slip control approaches for tractors do not fulfil this requirement due to fixed reference set-point.
APA, Harvard, Vancouver, ISO, and other styles
2

De, Kock Hugo Werner. "Position sensorless and optimal torque control of reluctance and permanent magnet synchronous machines." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1314.

Full text
Abstract:
Thesis (PhD (Electric and Electronic Engineering))--University of Stellenbosch, 2009.<br>Keywords: position sensorless control, torque control, synchronous machines The work in this thesis deals with energy e cient torque control and rotor position estimation in the full speed range, for a family of synchronous machines that should be used more often in the near future. This family consists of the permanent magnet synchronous machine (PMSM), the reluctance synchronous machine (RSM), the interior-PMSM and the PMassisted- RSM. By designing and controlling these synchronous machines correct
APA, Harvard, Vancouver, ISO, and other styles
3

Faustner, David [Verfasser]. "Modeling and Optimal Torque Control of Saturated Surface-Mounted Permanent Magnet Synchronous Machines / David Faustner." Aachen : Shaker, 2016. http://d-nb.info/1124366695/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Siampis, Efstathios. "Optimal torque vectoring control strategies for stabilisation of electric vehicles at the limits of handling." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11777.

Full text
Abstract:
The study of chassis control has been a major research area in the automotive industry and academia for more than fifty years now. Among the popular methods used to actively control the dynamics of a vehicle, torque vectoring, the method of controlling both the direction and the magnitude of the torque on the wheels, is of particular interest. Such a method can alter the vehicle’s behaviour in a positive way under both sub-limit and limit handling conditions and has become even more relevant in the case of an electric vehicle equipped with multiple electric motors. Torque vectoring has been so
APA, Harvard, Vancouver, ISO, and other styles
5

Bida, Oljeta. "Influence of electromyogram (EMG) amplitude processing in EMG-torque estimation." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd--01295-140510/.

Full text
Abstract:
Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: system identification; EMG; optimal sampling rate; linear torque model; EMG-torque model; EMG amplitude; torque. Includes bibliographical references (p. 77-86).
APA, Harvard, Vancouver, ISO, and other styles
6

Blazquez, Ivan. "An Optimal Interset Rest Period For Strength Recovery During A Common Isokinetic Test." ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/833.

Full text
Abstract:
Introduction: Isokinetic testing is used in rehabilitation settings on a regular basis, yet there is a lack of consistency in rest period usage among protocols. Purpose: The purpose of this study was to establish an optimal rest period that would allow reproducibility of strength during a common isokinetic strength-test. Methods: Twentyseven healthy college-aged males underwent isokinetic strength testing to determine peak torque at 60, 180 and 300 deg/sec, respectively. Work:rest ratios of 1:3, 1:8 and 1:12 were counterbalanced between sets. A 3 X 3 repeated measures ANOVA was used to analyze
APA, Harvard, Vancouver, ISO, and other styles
7

Wu, Hailong. "Modelization and control of synchronous reluctance machines for the torque ripple minimization - study of vibrational and acoustic behavior." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCA003.

Full text
Abstract:
Cette thèse porte sur l’optimisation du contrôle des Machines Synchrones à Réluctance Variable (MSRV) et en particulier sur la compensation des phénomènes vibratoires. Elle comprend trois points forts : le développement d’une méthode de minimisation des pulsations de couple et sa validation expérimentale, l’études des facteurs qui peuvent influencer la méthode et l’influence de cette méthode sur les autres performances de la MSRV.Tout d’abord, une méthode de contrôle permettant de compenser les ondulations de couple d’une MSRV existante a été développée. Premièrement, une équation analytique d
APA, Harvard, Vancouver, ISO, and other styles
8

Bovee, Katherine Marie. "Optimal Control of Electrified Powertrains with the Use of Drive Quality Criteria." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1448273973.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Osinenko, Pavel [Verfasser], Thomas [Akademischer Betreuer] Herlitzius, and Klaus [Akademischer Betreuer] Röbenack. "Optimal slip control for tractors with feedback of drive torque / Pavel Osinenko. Gutachter: Thomas Herlitzius ; Klaus Röbenack. Betreuer: Thomas Herlitzius." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://d-nb.info/1069040665/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Febrer, Nafría Miriam. "Optimal control prediction of assisted walking using torque-driven models : application to active orthosis simulation to assist individuals with spinal cord injury." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/672506.

Full text
Abstract:
Walking impairment after spinal cord injury leads to a decreased quality of life, other serious health conditions, and substantial health care costs. Consequently, gait restoration is a high priority among spinal cord-injured (SCI) subjects; and it can be partially achieved using active orthoses or exoskeletons, together with some type of external support for balance (e.g., crutches or a walker). Customisation of active orthoses control algorithms to maximise the walking ability of each patient is currently done through trial-and-error methods, making it difficult if not impossible to identify
APA, Harvard, Vancouver, ISO, and other styles
11

Brahma, Avra. "Methodologies for modeling and feedback control of the nox-BSFC trade-off in high-speed, common-rail, direct-injection diesel engines." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1118713041.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Tranter, Andrew David. "Non-contact optical strain and torque measurement." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266144.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Ramírez, José Miguel. "Contribution à la commande optimale des machines asynchrones." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0076.

Full text
Abstract:
Ce travail est consacree a la commande optimale des moteurs d'induction. L'objectif de commande est ici d'assurer la poursuite d'une trajectoire de reference de couple, en utilisant le flux comme le degre de liberte qui permet de minimiser l'energie de la machine. Le probleme est formule comme un probleme classique de commande optimale, en minimisant un critere convexe dans l'etat et la commande, soumis a la restriction dynamique lineaire du flux et a une restriction algebrique de poursuite de couple. Des solutions analytiques sont donnees pour le couple desire constante, en resolvant l'equati
APA, Harvard, Vancouver, ISO, and other styles
14

Flayols, Thomas. "Exploitation du Retour de Force pour l'Estimation et le Contrôle des Robots Marcheurs." Thesis, Toulouse, INSA, 2018. http://www.theses.fr/2018ISAT0025/document.

Full text
Abstract:
Dans cette thèse, on s’intéresse à la commande des robots marcheurs. Contrôler ces systèmes naturellement instables, de dynamique non linéaire, non convexe, de grande dimension, et dépendante des contacts représente un défi majeur en robotique mobile. Les approches classiques formulent une chaîne de contrôle formée d’une cascade de sous problèmes tels que la perception, le planning, la commande du corps complet et l’asservissement articulaire. Les contributions rapportées ici ont toutes pour but d’introduire une rétroaction au niveau de la commande du corps complet ou du planning. Précisément,
APA, Harvard, Vancouver, ISO, and other styles
15

Rakgati, Edward Tshitshiri. "Torque Performance of Optimally Designed Multi-Phase Reluctance DC Machines." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1174.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Truong, Phuoc Hoa. "Optimisation des performances de la machine synchrone à réluctance variable : approches par la conception et par la commande." Thesis, Mulhouse, 2016. http://www.theses.fr/2016MULH8861/document.

Full text
Abstract:
L'objectif principal de nos travaux consiste à développer des méthodes d’optimisation des performances de la MSRV sur le plan de la conception et de la commande. La première partie est consacrée à la commande de la MSRV avec prise en compte de la saturation, de l'effet croisé et des pertes-fer. Deux stratégies de commande permettant d’améliorer les performances de la machine en régime permanent sont présentées: commande à rendement optimal et commande à couple maximum par ampère. La deuxième partie de ce travail porte sur la commande de la MSRV en vue de réduire les ondulations de couple. L’op
APA, Harvard, Vancouver, ISO, and other styles
17

Bush, Julia K. "Optimal Slewing of a Constrained Telescope Using Seventh Order Polynomial Input Torques." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/860.

Full text
Abstract:
Two-axis gimbals are frequently used to point cameras and telescopes at various points of interest for surveillance, science, and art. The rotation of a two-axis gimbal system is governed by nonlinear angular momentum equations of motion. This paper presents a method for slewing a telescope in space with a gimbaled sensor attached to a nominally non-rotating spacecraft using two seventh order polynomial input functions to characterize torques. To accomplish this task, picking the optimal coefficients of the seventh order polynomial was necessary. It was also desired to use constraint equations
APA, Harvard, Vancouver, ISO, and other styles
18

Mohamad, Haidar Jawad. "Ultrafast optical measurements of spin-polarized electron dynamics in nanostructured magnetic materials." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/18425.

Full text
Abstract:
At present, electronic devices depend upon electric charge to transfer and record information. However, such devices are approaching a scaling limit due to Joule heating. Spintronics offers a solution by exploiting the spin rather than the charge of the electron, since the propagation of spin current can in principle occur without dissipation. Immediate applications lie in magnetic random access memory and novel media for hard disk recording. Within this thesis, the Magneto-optical Kerr effect (MOKE) has been used to measure the static and dynamic magnetic properties of a number of different t
APA, Harvard, Vancouver, ISO, and other styles
19

Sargeant, Ramon Bradley. "A multi-axial optical fibre and linear polarizer based force and torque sensor for dexterous robotic fingertips." Thesis, King's College London (University of London), 2014. http://kclpure.kcl.ac.uk/portal/en/theses/a-multiaxial-optical-fibre-and-linear-polarizer-based-force-and-torque-sensor-for-dexterous-robotic-fingertips(a9c419a3-901e-4a56-9b02-00648539d17e).html.

Full text
Abstract:
As robots play a more pervasive role in our everyday activities more and more research emphasis is being placed on having robots interact directly with humans, whether in terms of taking care of the elderly, medical interventions or performing dangerous or hazardous tasks. Another trend is for robots to use existing human tools to perform desired actions since it is also not always possible or cost effective to design special tools for every robot. This trend has led to the development of anthropomorphic dexterous manipulators that can perform equally or better than the human hand. Thus the ac
APA, Harvard, Vancouver, ISO, and other styles
20

Knobel, Christian. "Optimal control allocation for road vehicle dynamics using wheel steer angles, brake, drive torques camber angles." Düsseldorf VDI-Verl, 2009. http://d-nb.info/992593425/04.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Pieslinger, Simon, and Beatrice Lundquist. "Bergbultsmodell - optimalt och minimalt utförande." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-409988.

Full text
Abstract:
Har du någonsin åkt genom en tunnel och undrat hur det kommer sig att det tunga berget över dig inte kollapsar in i detta hålrum? Har du lagt märke till underliga metallpinnar som sticker ut ur väggar och tak? Dessa metallpinnar är bultar, och de är en del av säkerhetsåtgärderna som ser till att tunnlar över hela Sverige är säkra att färdas i. När en tunnel byggs är det viktigt att ta reda på vilka egenskaper som berget har för att kunna avgöra hur stora säkerhetsåtgärder som bör implementeras. Dessa egenskaper kan vara sådant som sprickors utbredning och orientering, hur mycket vatten som fin
APA, Harvard, Vancouver, ISO, and other styles
22

Bilyard, Thomas. "Single molecule studies of F1-ATPase and the application of external torque." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:9f369674-4105-4bf1-a0ce-023db1f8bd7f.

Full text
Abstract:
F<sub>1</sub>-ATPase, the sector of ATP synthase where the synthesis of cellular ATP occurs, is a rotary molecular motor in its own right. Driven by ATP hydrolysis, direct observation of the rotation of the central axis within single molecules of F<sub>1</sub> is possible. Operating at close to 100% efficiency, F<sub>1</sub> from thermophilic Bacillus has been shown to produce ~40pN&dot;nm of torque during rotation. This thesis details the groundwork required for the direct measurement of the torque produced by F<sub>1</sub> using a rotary angle clamp, an optical trapping system specifically d
APA, Harvard, Vancouver, ISO, and other styles
23

Smith, Gregory. "An Analysis of Critically Enabling Technologies for Force and Power Limiting of Industrial Robotics." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1501860011636585.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

BEZZICCHERI, MATTEO. "Problems in measurement of mechanical loads in wind turbines: bending/torsional moments by strain gage bridges and torque by optical transducer." Doctoral thesis, Università Politecnica delle Marche, 2018. http://hdl.handle.net/11566/252847.

Full text
Abstract:
Il lavoro tratta la complessità di misurare carichi meccanici su grandi turbine eoliche; parametri cruciali per la certificazione e il monitoraggio delle condizioni di funzionamento. I carichi meccanici di maggior rilievo su una turbina eolica sono i momenti flettenti e torcenti che, in accordo con la normativa IEC 61400‐13, è consigliabile misurare attraverso ponti estensimetrici interi. Questa tesi discute le linee guida per la progettazione della catena di misura estensimetrica e confronta le diverse possibili procedure di calibrazione: analitica, carichi esterni e squilibri propri. Il la
APA, Harvard, Vancouver, ISO, and other styles
25

Nguyen, Ngac Ky. "Approches neuromimétiques pour l'identification et la commande des systèmes électriques : application au filtrage actif et aux actionneurs synchrones." Phd thesis, Université de Haute Alsace - Mulhouse, 2010. http://tel.archives-ouvertes.fr/tel-00615491.

Full text
Abstract:
Cette thèse propose des approches neuromimétiques d'identification et de commande avec des applications directes au Filtre Actif Parallèle (FAP) et au Moteur Synchrone à Aiment Permanent (MSAP). Une structure neuronale complète a été développée pour réaliser toutes les fonctionnalités d'un FAP pour compenser des harmoniques de courant. La phase instantanée et les composantes symétriques d'un système triphasé de tensions ou de courants ont été estimées avec une boucle à verrouillage de phase neuronale. L'identification des harmoniques de courant a été réalisée avec des réseaux de neurones de ty
APA, Harvard, Vancouver, ISO, and other styles
26

Santos, Núria Alice Alves Silva. "Otimização de torre de aço para aerogerador eólico." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7856.

Full text
Abstract:
Fundação Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro<br>Diversas formas de geração de energia vêm sendo desenvolvidas com o objetivo de oferecer alternativas ecologicamente corretas. Neste contexto, a energia eólica vem se destacando na região Nordeste do Brasil, devido ao grande potencial dos ventos da região. As torres, que representam parcela significativa do custo total do sistema, tendem a crescer buscando ventos mais fortes e permitindo assim a utilização de aerogeradores com maior capacidade de geração de energia. Este trabalho tem como objetivo formular um mode
APA, Harvard, Vancouver, ISO, and other styles
27

Guo, Zongxia. "Electrical and optical manipulation of exchange bias." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0204.

Full text
Abstract:
L'expansion rapide en termes d'échelle et de complexité des dispositifs électroniques pour les applications d'apprentissage automatique et d'intelligence artificielle actuelles engendre une demande considérable en nouvelles architectures. L'industrie est activement à la recherche de nouvelle génération de mémoires et de stockage capables d'offrir vitesse, densité, et une meilleure efficacité énergétique. Les mémoires non volatile magnétorésistive (MRAM), dont les états magnétiques permettent de stocker l'information suscitent un intérêt grandissant. Jusqu'à présent la direction d'aimantation d
APA, Harvard, Vancouver, ISO, and other styles
28

El, Ketara Mohamed. "Réorientation optique des cristaux liquides en présence de singularités matérielles ou lumineuses." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00955155.

Full text
Abstract:
Ce travail de thèse consiste en l'étude détaillée des conséquences matérielles et ondulatoires de l'application d'un faisceau laser sur l'orientation d'un film de cristal liquide nématique dans un cadre bien particulier, dénommé la réorientation optique "topologique". Cela correspond en pratique à une situation où la lumière donne naissance à un défaut d'orientation pour le champ de directeur, dont la nature dépend des caractéristiques du champ lumineux excitateur (polarisation, phase, intensité). Après avoir introduit la notion de réorientation optique topologique, identifié et discuté les co
APA, Harvard, Vancouver, ISO, and other styles
29

Holmes, Erin. "The Politics of Torture, Human Rights, and Oversight: The Canadian Experience with the UN's Optional Protocol to the Convention Against Torture (OPCAT)." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23800.

Full text
Abstract:
Torture has long been denounced by the international community; the need to protect citizens from abuse at the hands of the state is a principle enshrined in international law. One area where abuse is common is within the correctional system and as a result, there is a need for oversight in places of detention. The Optional Protocol to the UN’s Convention Against Torture (OPCAT) is an international human rights instrument that acts as a preventive measure to monitor all places of detention through regular visits. Supportive of the OPCAT since its adoption, Canada has considered signature/ratif
APA, Harvard, Vancouver, ISO, and other styles
30

Schneider, Tobias [Verfasser]. "Optisches Messverfahren zur gleichzeitigen Erfassung von Absolutdrehwinkel und Drehmoment an Wellen : Optical system for measuring simultaneously the absolute angle of rotation and the torque of shafts / Tobias Schneider." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://d-nb.info/1220422649/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Nouho, Ali Ali. "Confinement électromagnétique sub-longueur d'onde et couplage entre nano-structures photoniques : Calcul de forces et de moments optiques." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD057.

Full text
Abstract:
Ce travail de thèse constitue une contribution à la modélisation numérique de nouveaux dispositifs optiques à base des nano-structures de la photonique tel que les cristaux photoniques, les nano-antennes plasmoniques ou les métamatériaux à transmission exaltée. L’objectif est d’exploiter les propriétés de confinement de la lumière dans ces structures pour exalter davantage ce confinement ou les utiliser comme source de piégeage afin de manipuler des nano-particules métallo-diélectriques résonantes ou non-résonantes. La première partie est consacrée à la modélisation du champ électrostatique lo
APA, Harvard, Vancouver, ISO, and other styles
32

Gadonna, Katell. "Torche à plasma micro-onde à la pression atmosphérique : Transfert thermique." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00699619.

Full text
Abstract:
Parmi les torches à plasma microonde, la torche à injection axiale (TIA) est utilisée depuis de nombreuses années pour créer des espèces chimiquement actives dans des applications comme l'analyse de gaz, les traitements de surface et les traitements d'effluents gazeux. Notre étude porte sur l'énergie transférée par le plasma créé par cette torche à pression atmosphérique, qui trouve son intérêt notamment dans le chauffage de l'hélium pour la montée en altitude d'un ballon dirigeable. La TIA permet de coupler de l'énergie microonde (2.45 GHz) à un gaz injecté axialement à la sortie d'une buse.
APA, Harvard, Vancouver, ISO, and other styles
33

Gräf, Manuel. "Efficient Algorithms for the Computation of Optimal Quadrature Points on Riemannian Manifolds." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-115287.

Full text
Abstract:
We consider the problem of numerical integration, where one aims to approximate an integral of a given continuous function from the function values at given sampling points, also known as quadrature points. A useful framework for such an approximation process is provided by the theory of reproducing kernel Hilbert spaces and the concept of the worst case quadrature error. However, the computation of optimal quadrature points, which minimize the worst case quadrature error, is in general a challenging task and requires efficient algorithms, in particular for large numbers of points. The focus
APA, Harvard, Vancouver, ISO, and other styles
34

Jha, Akhilesh K. "Vibration Analysis and Control of an Inflatable Toroidal Satellite Component Using Piezoelectric Actuators and Sensors." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28243.

Full text
Abstract:
Inflatable structures have been a subject of renewed interest in recent years for space applications such as communication antennas, solar thermal propulsion, and entry/landing systems. This is because inflatable structures are very lightweight and on-orbit deployable. In addition, they have high strength-to-mass ratio and require minimal stowage volume, which makes them especially suitable for cost-effective large space structures. An inflated toroidal structure (torus) is often used there in order to provide structural support. For these structures to be effective, their vibration must be co
APA, Harvard, Vancouver, ISO, and other styles
35

Ackermann, Marilize. "An assessment of South Africa's obligations under the United Nations Convention against torture." Thesis, University of the Western Cape, 2010. http://hdl.handle.net/11394/2638.

Full text
Abstract:
Magister Legum - LLM<br>I attempt to analyze South Africa's legal position pertaining to torture, in relation to the international legal framework. Since it has been established that torture and cruel inhuman and degrading treatment (CIDT) usually occur in situations where persons are deprived of personal liberty, I examine legislation, policies and practices applicable to specific places of detention, such as correctional centres, police custody, repatriation centers, mental health care facilities and child and youth care centers. I establish that although South Africa has ratified the UNCAT
APA, Harvard, Vancouver, ISO, and other styles
36

Wei, Jiaqi. "Magnetization manipulation induced by spin current and ultrafast laser." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0121.

Full text
Abstract:
La manipulation de l’aimantation est un des sujets de recherche les plus étudiés dans le domaine de l’électronique de spin. Différentes méthodes de manipulations peuvent exciter les propriétés dynamiques de l’aimantation à différentes échelles de temps. Parmi les phénomènes dynamiques, la précession de l’aimantation et la désaimantation ultrarapide ont suscité un intérêt particulier. La fréquence de précession de l’aimantation est de l’ordre du GHz et correspond à une période de centaines de picosecondes. Cette précession est le mécanisme à l’œuvre dans les nano-oscillateurs à transfert de spi
APA, Harvard, Vancouver, ISO, and other styles
37

Zhu, Lin. "Etude de la projection plasma sous très faible pression - torches et procédé de dépôt." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2011. http://tel.archives-ouvertes.fr/tel-00703247.

Full text
Abstract:
Au cours de la dernière décennie, la technologie de projection à la torche à plasmasous très faible pression (VLPPS) (inférieure à 10 mbar) a attiré l'attention denombreux chercheurs car ce procédé permet d'envisager la possibilité de réaliser desdépôts de structure voisine de celle des dépôts en phase vapeur avec une cinétiqueproche de celle de la projection thermique classique. Cette technologie vise donc àévaporer totalement ou partiellement des poudres afin de déposer des revêtementsdenses avec une structure colonnaire ou mixte.Le travail effectué dans cette étude à consisté à étudier et à
APA, Harvard, Vancouver, ISO, and other styles
38

Li, Iila Jingjiao. "Flexible polyhedra : exploring finite mechanisms of triangulated polyhedra." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/271806.

Full text
Abstract:
In a quest to design novel deployable structures, flexible polyhedra provide interesting insights. This work follows the discovery of flexible polyhedra and aims to make flexible polyhedra more useful. The dissertation describes how flexible polyhedra can be made. The flexible polyhedra first considered in this dissertation have a rotational degree of freedom. The range of this rotational movement is measured and maximised in this work by numerical maximisation. All polyhedra are established computationally: an iterative solution method is used to find vertex coordinates; several clash detecti
APA, Harvard, Vancouver, ISO, and other styles
39

Hakala, Tim. "Settling-Time Improvements in Positioning Machines Subject to Nonlinear Friction Using Adaptive Impulse Control." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1061.

Full text
Abstract:
A new method of adaptive impulse control is developed to precisely and quickly control the position of machine components subject to friction. Friction dominates the forces affecting fine positioning dynamics. Friction can depend on payload, velocity, step size, path, initial position, temperature, and other variables. Control problems such as steady-state error and limit cycles often arise when applying conventional control techniques to the position control problem. Studies in the last few decades have shown that impulsive control can produce repeatable displacements as small as ten nanomete
APA, Harvard, Vancouver, ISO, and other styles
40

Li-Wen, Lin, and 林麗雯. "Optimal Torque Design of An Ultrasonic Motor System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/73207880674580491230.

Full text
Abstract:
碩士<br>國立中正大學<br>機械系<br>93<br>In order to make the rotor move around, the ultrasonic motor makes use of the friction between the rotor and the deformation produced by inverse piezoelectric effect caused by the electrified stator. This study is primarily aimed at increasing the maximum interface torque between the rotor and the stator to shorten the time of the rotor starting to move around. With optimum methods, we can reduce the time of making the rotor move around and then drive the object when the motor bears equal external torque. This study defines two single objective functions. One is
APA, Harvard, Vancouver, ISO, and other styles
41

Osinenko, Pavel. "Optimal slip control for tractors with feedback of drive torque." Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28368.

Full text
Abstract:
Traction efficiency of tractors barely reaches 50 % in field operations. On the other hand, modern trends in agriculture show growth of the global tractor markets and at the same time increased demands for greenhouse gas emission reduction as well as energy efficiency due to increasing fuel costs. Engine power of farm tractors is growing at 1.8 kW per year reaching today about 500 kW for the highest traction class machines. The problem of effective use of energy has become crucial. Existing slip control approaches for tractors do not fulfil this requirement due to fixed reference set-point.
APA, Harvard, Vancouver, ISO, and other styles
42

Yang, Shih-Chin, and 楊士進. "Optimal Design and Current Control Waveform of Torque Motor for Machine Tools." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/75867864633293596154.

Full text
Abstract:
碩士<br>國立臺灣大學<br>機械工程學研究所<br>95<br>Machine tools are most important and fundamental in the industry, especially at present, where there are great concerns about energy shortage and human-centered technologies. Traditional machine tools indirectly driven by conventional motors do not always operate efficiently, due to their mass moment of inertia and complexly coupled mechanisms. Today, a new competitive environment is emerging and forcing the evolution of machine tools for increasing efficiency over a wide range of operation. A directly driven torque motor has become a promising solution to the
APA, Harvard, Vancouver, ISO, and other styles
43

Yang, Shih-Chin. "Optimal Design and Current Control Waveform of Torque Motor for Machine Tools." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2407200723325400.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Kuo, Chia-Cheng, and 郭家成. "Optimal Torque Distribution Control of Electric Vehicle with Four Direct Driven Wheel Motors." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/g7u62g.

Full text
Abstract:
碩士<br>國立臺北科技大學<br>車輛工程系所<br>100<br>The electric vehicle driven with four wheel motors is an over actuated system. In order to maintain the maneuverability and stability, a gain scheduled linear quadratic regulator is used to design the electric stability control system to generate the reference yaw moment command based on the linear two degree-of-freedom bicycle model. Control allocation is used to distribute the desired reference longitudinal tire forces according to the yaw moment commend while satisfying the driver’s need for acceleration and deceleration. The associated weighting matrix i
APA, Harvard, Vancouver, ISO, and other styles
45

Hung, Po-Chang, and 洪伯菖. "Optimal Design of a High Torque Density Permanent Magnet Motor for Electric Scooters." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/03227637364226210574.

Full text
Abstract:
碩士<br>國立臺灣大學<br>機械工程學研究所<br>101<br>The current trend of eco-consciousness has led many governments around the world to attempt to popularize electric vehicles (EVs). This study discusses an optimal design for a high torque density PM motor for electric scooters, which has a torque density performance of roughly 10Nm/kg. In comparison with other motors which have the same output torque, this motor is smaller in volume and has a lower weight. The thesis first discusses the design process, in terms of the direction of flux and the choosing of a combination with the right number of slots and pol
APA, Harvard, Vancouver, ISO, and other styles
46

Lee, Chung-Han, and 李忠翰. "Optimal Design of a High Torque Density Wheel Motor for a Light Electric Vehicle." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/31831766782059502532.

Full text
Abstract:
碩士<br>國立臺灣大學<br>機械工程學研究所<br>99<br>In this thesis, a high torque density electric motor is designed for light electric vehicles. This directly driven axial-flux DC motor features compactness, low weight, and high efficiency, and is suitable for electric vehicles. First of all, the motor and winding types were selected by comparing their advantages and disadvantages, and then the winding factor was calculated to choose the optimal number of slots and poles. Second, a 2-D magnetic circuit model and the electromagnetic equations were established for an optimal motor design with multifunctional opt
APA, Harvard, Vancouver, ISO, and other styles
47

Shih, Chun-Ho, and 施純和. "The Composite Design of Computed Torque Method and H∞-Optimal Methodology Applicable to Robot Manipulators." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/93379136685631875286.

Full text
Abstract:
碩士<br>國立成功大學<br>系統及船舶機電工程學系碩博士班<br>97<br>Robots or manipulator systems usually contain high nonlinearities and are classified as multi-variable systems. In many realistic environments, system performance is very sensitive to external disturbances or uncertainties: such as disturbance in actuators and the change of payload due to tasks...etc. In this article, a robust design procedure composed of the “computed torque method” and “H∞-optimal control methodology” is proposed to achieve the desired performance by rejecting system disturbances and uncertainties. The well-known “computed torque
APA, Harvard, Vancouver, ISO, and other styles
48

Lin, Ho-An, and 林河安. "Reduction of Torque Ripples and Optimal Design of Brushless DC Wheel Motor of Electrical Vehicles." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/81800957488705401338.

Full text
Abstract:
碩士<br>國立臺灣大學<br>機械工程學研究所<br>91<br>Axial-flux permanent magnet (AFPM) motors can be designed to achieve a higher torque-to-weight ratio and motor efficiency, and are suitable for wheel motor applications. This thesis discusses the reduction of torque ripples for a brushless DC motor, and its optimal design by minimizing the torque ripple and maximizing the output torque. First, the equivalent magnet circuit model governing the relationship between alignment torque, phase current, and back EMF of the DC brushless motor are established depending on the real wheel motor geometry. The reduction of
APA, Harvard, Vancouver, ISO, and other styles
49

Chien, Ting-Yu, and 簡廷宇. "Optimal Design of the Permanent Magnet Brushless DC Motor in Small Capacity for Low Cogging Torque and High Efficiency." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/b62fc2.

Full text
Abstract:
碩士<br>國立臺灣科技大學<br>電機工程系<br>104<br>The purpose of the thesis is to analyze and design on permanent magnet dc motor (PMDC) with high performances and low cogging torque, especially for high-speed applications such as electric screwdrivers. The rare earth magnet has been used to reduce volume and improve the efficiency of the motor with its high residual induction, high coercivity and high BHmax performances. That is why the PMDC is suitable for industrial application and modern commercial appliances. In this thesis, the brushless DC motor which used in industrial applications was analyzed first
APA, Harvard, Vancouver, ISO, and other styles
50

Melendy, Robert F. "Noncontact measurement of shaft torsional displacements by optical means /." 1994. http://hdl.handle.net/1957/9457.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Optimal torque' for other source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography