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Dissertations / Theses on the topic 'Wheels'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Gurney, Frederick. "Wheels within wheels : an examination of Witold Lutoslawski's Trois poèmes d'Henri Michaux /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/11262.

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2

Wood, Alice. "Of wings and wheels." Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/2022.

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What are the biblical cherubim? In the Hebrew Bible, the physical appearance and cultic role of the cherubim are never explicitly elucidated. Largely, the authors assume their audience is familiar with the form and function of these heavenly beings. Yet the portrayal of the cherubim varies from text to text and, sometimes, we are given conflicting information. Previous studies of the cherubim have placed too great an emphasis on archaeological and etymological data. This thesis presents a new synthetic study which prioritises the evidence supplied by the biblical texts. Biblical exegesis, usin

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3

Baker, Brittany S. M. Massachusetts Institute of Technology. "Reconfigurable wheels : re-inventing the wheel for the next generation of planetary rovers." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/71459.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 84-85).<br>Experiences with Spirit and Opportunity, the twin Mars Exploration Rovers, showed that one of the major issues that needs to be addressed in order to expand the exploration capabilities of planetary rovers is that of wheel traction. The relationships governing how much traction a wheel can produce are highly dependent on both the shape of the wheel and terrain properties. These relationships are complex

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4

Lawton, Natalie. "Planetary Rover Wheel and Lower Leg Structural Design to Reduce Rock Entanglements." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-78565.

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This thesis looks at the SherpaTT planetary rover. The rover is a hybrid walking and driving rover that has been developed and built by DFKI and has already been deployed on several Mars analogue field studies. The SherpaTT rover wheels were found to become entangled in rocks during the last field deployment in Morocco. As human intervention would be impossible on Mars the aim is to reduce the possibility of rock entanglements by performing a mechanical redesign of the wheels. During this redesign care is taken to ensure the current traction, slip-resistance, weight and strength are not advers

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5

Lock, Julia. "Cyclodextrins : molecular wheels for supramolecular chemistry /." Title page, table of contents and abstract only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phl8131.pdf.

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Thesis (Ph.D.)--University of Adelaide, School of Chemistry and Physics, Discipline of Chemistry, 2005?<br>"July 2004" Includes copies of publications by the author as appendix. Includes bibliographical references.

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6

Moore, Jaclyn Kate. "Aerodynamics of High Performance Bicycle Wheels." Thesis, University of Canterbury. Mechanical Engineering, 2008. http://hdl.handle.net/10092/1800.

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This thesis presents the work undertaken to assess potential improvements in high performance bicycles. There are several wheel options available for elite riders to use in competition and this research has investigated the aerodynamic properties of different wheel type. The research has also developed CFD and FEA models of carbon fibre bicycle wheels to assist in the wheel improvements process. An accurate and repeatable experimental test rig was developed to measure the aerodynamic properties of bicycle wheels in the wind tunnel, namely translational drag, rotational drag and side force. Bo

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7

Brash, Benjamin. "Distortions of Press Quenched Crown Wheels." Thesis, KTH, Materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170022.

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Scania has experienced difficulties with large variations of the slope of the back plane after press quenching of case hardened crown wheels of especially type R780 Steg supplied from ingot cast material. This leads to that a large number of crown wheels has to be remeasured and sorted according to back slope which is time consuming for operators. Also, after sorting of the crown wheels, hard machining has to be adjusted according to the different slopes of the back plane of the crown wheels. In some cases, it also leads to scrapping of the crown wheels.This master’s thesis was divided in two

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8

Taghizadeh, Mohammad. "Robot with Three Independently Steerable Wheels." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10784154.

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<p> Technology in robotics has improved significantly in recent years. While the majority of research has focused on improving existing methods, it is advantageous to challenge these established methodologies and develop new solutions. This new research centers on a novel method of robot movement design. The proposed model concentrates on a robot containing three steerable wheels, allowing the mobile robot to reach the desired orientation and coordinates with minimal movement. This goal is accomplished by simultaneously moving and rotating the robot while moving in a straight path, unlike the

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9

Hojnik, Tim. "Dynamically configurable centre of rotation wheels." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/212361/1/Tim_Hojnik_Thesis.pdf.

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This thesis reinvents the wheel to develop a locomotion system that exhibits high efficiency and exceptional obstacle clearing ability, the Posable Hub. This is achieved by using a rigid rim with an actively movable centre hub, through the use of linear actuators. The centre hub can be adjusted in a number of ways, exhibiting functionality that ultimately increases the wheel’s traversability.

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10

VENTURINI, SIMONE. "Design methodologies for automotive steel wheels." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2971317.

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11

Flores, Álvarez Pedro Alonso. "Modelling, simulation and experimental verification of a wheeled-locomotion system based on omnidirectional wheels." Master's thesis, Pontificia Universidad Católica del Perú, 2016. http://tesis.pucp.edu.pe/repositorio/handle/123456789/7554.

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The following work focuses on the kinematic and dynamic study of a four-wheeled robot, which is equipped with omnidirectional Mecanum wheels. The main objective of the thesis is to obtain a mathematical model from which both the kinematics and kinetics of the robot can be analyzed. Furthermore, the study presents a methodology to optimize the torques (and subsequent associated voltages) provided by each of the motors on the robot for a given trajectory. A system in which a non-powered trailer pulled by the robot is also analyzed at a kinematic level. In this stage, four different cases

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12

Simonson, Carey James. "Heat and moisture transfer in energy wheels." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0014/NQ27431.pdf.

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13

Avril, Nicolas Joseph. "Manufacturing glass-fiber reinforcement for grinding wheels." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38432.

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14

West, Mark. "Design of omnidirectional vehicles with ball wheels." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/10657.

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15

Baker, Michael Lloyd. "Antiferromagnetic wheels probed by inelastic neutron scattering." Thesis, University of Manchester, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542789.

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16

Jo, Jinmyun. "Residual stress measurement in railroad car wheels." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54206.

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A new failure criterion for discriminating good and bad (overheated) railroad car wheels is proposed. This criterion can replace the conventional “four inch" discoloration rule. The procedure for the new discrimination criterion is based on the fluctuations of the azimuthal residual stress in the tread of the wheel. This criterion is based on a maximum likelihood statistical analysis of data obtained from six different wheels as deterrmined by x-ray diffraction. Of these locations, the analysis showed the tread, and perhaps a critical point on the top of the flange, to be the most sensitive to

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17

Al-Ghamdi, Abdulmajeed Saeed. "ANALYSIS OF AIR-TO-AIR ROTARY ENERGY WHEELS." Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1146201291.

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18

McKinnon, Mona Claire. "A study of Vancouver-Richmond meals-on-wheels." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/26002.

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Little is known about Meals-on-Wheels organizations, though they exist in many western countries. The purpose of this study is to examine the Vancouver-Richmond Meals-on-Wheels service as an organization and from that examination to provide information about clients, volunteers, staff, and organizational management. The literature was searched for guidance on the concept of Meals-on-Wheels. Was there any definition of an ideal organization? Similarly, discussions with government officials in the Province of British Columbia were conducted to determine what they thought this organization migh

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19

Adams, David Edwin. "On the gracefulness of girders and big wheels." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40021.pdf.

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20

Rodriguez, Jesus. "Simulation of wheels in nonlinear, flexible, multibody systems." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/12068.

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21

Faragalli, Michele. "Multi-objective design optimization of compliant lunar wheels." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117030.

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The development of the wire-mesh wheel of the Apollo Lunar Roving Vehicle was realized through a time consuming trial and error design process, primarily driven by manufacturability and physical testing. Recent wheel development, motivated by renewed interest in lunar surface exploration, utilizes more sophisticated numerical simulation tools. However, many researchers still employ trial and error or parametric approaches to designing the wheels. This thesis proposes a systematic approach to the design optimization of compliant lunar wheels. The problem is decomposed into system and component

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22

Moreland, Scott J. "Traction Processes of Wheels in Loose, Granular Soil." Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/278.

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This dissertation presents analyses of subsurface motions of soil beneath different traction devices and develops new explanations of traction processes of wheels operating in loose granular soil based on these observations. This dissertation shows how these findings are useful for the development of planetary rover mobility systems. Shear Interface Imaging Analysis (SIIA), is a new technique, developed as part of this thesis research. SIIA is employed for visualizing the effects of wheel operation on the soil beneath a rim, in richer detail than before possible. SIIA relies on high-speed imag

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23

Jerrett, Charles Francis Arthur. "The effects of forward spray from aircraft wheels." Thesis, University of Hertfordshire, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394075.

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24

Cai, Rui. "Assessment of vitrified CBN wheels for precision grinding." Thesis, Liverpool John Moores University, 2002. http://researchonline.ljmu.ac.uk/4972/.

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25

Florence, Lea C. "Rural-Urban Variations in Meals on Wheels Programs." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3700.

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Older adults are living longer than ever before. By 2060, the U.S. population aged 65 or older is projected to reach 98 million. As adults age, the prevalence of chronic diseases and disabilities increases. The need for Meals on Wheels (MOW) services is growing alongside the aging population. Yet, little is known about the geographic variation of services. Little is documented about the organizational capacity of MOW organizations in terms of geography. The current policies supporting home-and community-based services, including MOW, may be insufficient to support all older adults in all types

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26

Carthy, Laura. "Linking Wheels for use in quantum information processing." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/linking-wheels-for-use-in-quantum-information-processing(ca5addcd-5ce1-4e9d-86f5-e56405a4092c).html.

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Heterometallic Cr7Ni-containing wheels have been identified as potential qubits for use in quantum information processing. The work described in this thesis details attempts to form a variety of multi-qubit systems for the purposes of better understanding the interactions occurring between the wheels and also forming potential 2-qubit quantum gates using redox/photo-active links. Mono-substituted wheels of type [Pr2NH2][Cr7MF8(O2CCMe3)15(L)], where L is acarboxylate with a pendant coordinating group, have been synthesised for use as bulky ligands in coordination chemistry with metal complexes.

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27

Docherty, Rebecca Jennifer. "EPR spectroscopy of antiferromagnetically-coupled Cr3+ molecular wheels." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/epr-spectroscopy-of-antiferromagneticallycoupled-cr3-molecular-wheels(d8e2f345-f60f-425a-a630-5b0334601ce5).html.

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Currently, there is interest in the development of molecular-scale devices for use in quantum information processing (QIP). With this application in mind, physical studies on antiferromagnetically coupled molecular wheels [Cr7MF3(Etglu)(O2CtBu)15(phpy)], where M is a divalent metal cation (M = Mn2+, Zn2+, Ni2+) have been pursued. The heterometallic wheels contain an octagon of metal centres, which are bridged by fluoride ions, pivalate groups and a chiral N-ethyl-D-glutamine molecule which is penta-deprotonated and bound to the metal sites through all available O-donors. They are deep purple i

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28

Kakar, Seena Gill. "Nutrition on wheels business plan: A strategic analysis." CSUSB ScholarWorks, 2006. https://scholarworks.lib.csusb.edu/etd-project/3047.

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Describes the business plan for an entrepreneurial venture called Nutrition on Wheels, which will be the first locally owned and operated gourmet diet food delivery service in the Coachella Valley of California. The service will provide customized meals to fit the specific dietary needs of its customers. Covers the essential components of the business plan for Nutrition on Wheels including industry analysis, market potential, marketing plans, organization and operational plans, strategic management and a financial plan.

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29

pogni, matteo. "Numerical study of bicycle racing wheels aerodynamic performances." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3423273.

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Improving the aerodynamic performance in one of the major challenges in the engineering research applied to racing bicycle. In fact, aerodynamic drag is the main source of losses in cycling and causes between 70% and 90% of total losses in flat road pace (i.e., when not climbing). Moreover, also lateral forces imposed by crosswinds play an important role because they can destabilize the bike itself. The body of the cyclist is actually the most important source of drag, because of its relevant frontal area. However, it is necessary to improve also the bike’s components aerodynamics, which

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30

Agahi, Maryam. "Grinding polycrystalline diamond using a diamond grinding wheel." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20061114.150854/index.html.

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31

Lake, Kavan O. "Saving lives and money two wheels at a time." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Mar/10Mar%5FLake.pdf.

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Thesis (M.S. in Manpower Systems Analysis)--Naval Postgraduate School, March 2010.<br>Thesis Advisor: Henderson, David R. ; Hatch, William D. "March 2010." Author(s) subject terms: Motorcycle safety training, motorcycle accident, motorcycle fatality, motorcycle injury, motorcycle life insurance cost, motorcycle hospitalization cost, military occupational specialty cost. Includes bibliographical references (p. 69-70). Also available in print.

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32

Gerrard, Douglas R. "Dynamic control of a vehicle with two independent wheels." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA340452.

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Thesis (M.S. in Electrical Egnineering) Naval Postgraduate School, September 1997.<br>"September 1997." Thesis advisor(s): Xiaoping Yun. Includes bibliographical references (p. 27). Also available online.

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33

HassabAllah, AbdulRahman Adam. "Modelling the interaction between rigid wheels and deformable soils." Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239236.

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34

Ewin, Nathan. "Traction control for electric vehicles with independently driven wheels." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:dfc99786-fe17-4225-bd91-3ab83416981f.

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The necessity to reduce climate related emissions is driving the electrication of transportation. As well as reducing emissions Electric Vehicles (EV) have the capability of improving traction and vehicle stability. Unlike a conventional vehicle that uses a single Internal Combustion Engine (ICE) to drive one or both axles, an EV can have an electric machine driving each of the wheels independently. This opens up the possibility of using the electric machines as an actuator for traction control. In conventional vehicles the hydraulic brakes together with the ICE are used to actuate traction co

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35

Jensen, Emilie. "Measuring cost effectiveness of product wheels in food manufacturing." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/32786.

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Master of Agribusiness<br>Department of Agricultural Economics<br>Keith Harris<br>The focus of this research is to create a production schedule that will increase capacity while staying within business constraints of shelf life and warehouse space in a industrial food processing environment. The results support that product wheels maximize process responsiveness by lengthening production runs, and increasing safety stock inventory. In doing so, it maintains acceptable customer service levels and minimizes overtime costs. This study develops a model that simulates the relevant variables impact

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36

MacCarthy, Nigel Hugh. "An experimental study of the aerodynamics of exposed wheels." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/8488.

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37

Sun, Xun. "Design of Piezoelectric Reaction Wheels for Nanosatellite Attitude Control." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/22135.

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The Attitude control system is one of the most critical subsystems for nanosatellite missions, especially those missions which carry pointed payloads. A precise attitude control system can increase the payload compatibility and discover the new potential of nanosatellites. In this thesis, novel attitude control actuators and control algorithm base on piezoelectric ultrasonic motors were developed to overcome the limitations of size and power of nanosatellites, and the disadvantages of conventional nano reaction wheels. This design consists of a miniaturised driving circuit design for piezoele

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38

Tolley, Rebecca. "Disco, Tattoos and Tutus: Blue Collar Performances on Wheels." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/5739.

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39

Thompson, Kevin A. Rich Beverly Susan Meier Sherry L. "Students' understanding of trigonometry enhanced through the use of a real world problem improving the instructional sequence/." Normal, Ill. : Illinois State University, 2007. http://proquest.umi.com/pqdweb?index=0&did=1417799391&SrchMode=1&sid=14&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1207668571&clientId=43838.

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Thesis (Ph. D.)--Illinois State University, 2007.<br>Title from title page screen, viewed on April 8, 2008. Dissertation Committee: Beverly S. Rich, Sherry L. Meier (co-chairs), M. A. (Ken) Clements, Anthony W. Lorsbach. Includes bibliographical references (leaves 217-222) and abstract. Also available in print.

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40

García, Estébanez Jesús. "GPS-IMU Integration for a Snake Robot with Active Wheels." Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9107.

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<p>A snake robot will be defined herein as any multilink robot for whose shape and motion capabilities are reminiscent of a snake like PiKo [1]. PiKo is a five links snake robot with active wheels designed by SINTEF in collaboration with the Norwegian University of Science and Technology (NTNU). Researchers have been greatly interested in the development of robots like PiKo because of its shape versatility and motion capacity in difficult terrains. These skills and properties are useful for rescue teams working in earthquakes, pipe inspection operations and other utilities where access and mo

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41

Clarsen, Georgine. "The vote on wheels : Australian women and motoring, 1915-1945 /." Connect to thesis, 1997. http://eprints.unimelb.edu.au/archive/00000649.

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42

Ward, Michael James. "Practical models for ring-rolling of railway wheels and tyres." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616283.

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The ring-rolling process was first developed in the UK in the mid nineteenth century and is still widely used as the preferred method of forming seamless rings for many aerospace and automotive applications, as well as for producing railway wheels and tyres. This thesis describes the development of a finite element based mathematical model that can be used to simulate the process. The model has been developed with the intention of practical application within railway wheel manufacturer Adtranz New Wheel Products Division. A detailed review of previous research on the process is presented. The

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43

PEREIRA, MARCELO DA CRUZ. "POSITION CONTROL OF AN IN-PLANE PENDULUM USING REACTION WHEELS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19095@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Esse trabalho apresenta o estudo, manipulação e controle de um sistema de 2 graus de liberdade conhecido como pêndulo planar usando rodas de reação para alcançar certa posição, sendo o conceito básico desse sistema fundamentado na dinâmica de um pêndulo invertido. Utilizou-se o controle clássico PID e também controle Fuzzy, sendo gerado um modelo matemático simulado valendo-se de MatLab para análise desses controles, através da ferramenta Simulink que permite um auto ajuste para o controle do sistema. O PID foi construído de acordo com esse

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44

Woolfson, Robert. "Spins in rings : new chemistry and physics with molecular wheels." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/spins-in-rings-new-chemistry-and-physics-with-molecular-wheels(1cce143a-105e-4f8c-ac19-388f793fddc4).html.

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This thesis explores the synthesis and characterisation of a range of molecular wheels containing unpaired electron spins. These molecular spin systems are of considerable interest, both for the insight they provide into the physics of such systems and for their potential as quantum bits ("qubits") in a quantum information processing device. In particular, this thesis explores using these wheels to meet criteria 1 and 5 of the DiVincenzo criteria. The synthesis of a novel homometallic and nonametallic ring of CrIII ions is introduced, along with extensive physical characterisation. Inelastic N

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45

Biju, Dona. "A parametric study of oil-jet lubrication in gear wheels." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150786.

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A parametric study of oil-jet lubrication in gear wheels is conducted using Computational Fluid Dynamics (CFD) to study the eﬀect of the diﬀerent design parameters on the cooling performance in a gearbox. Flow in oil jet lubrication is found to be complex with the formation of oil ligaments and droplets. Various hole radii of 1.5, 2 and 2.5 mm along with ﬁve oil velocities is analyzed and it is found that at lower volumetric rates, velocity has more eﬀect on the cooling and at higher volumetric rates, hole size has more eﬀect on the cooling. At higher velocities, the heat transfer is much grea

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46

de, Miranda Adriana. "Water architecture in the lands of Syria : the water-wheels." Thesis, SOAS, University of London, 2006. http://eprints.soas.ac.uk/28678/.

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This thesis aims to evaluate the typology of water-wheels in Syria as an ancient type of water architecture which has had a fundamental role, over the centuries, for irrigation and supplying water to houses and public constructions. So far these devices have been studied in terms of their hydraulic and technological aspects, while their architectural and artistic qualities have often been neglected. The research provides a historical, architectural and iconographical study of these structures, focusing on those located in West Syria, where most water-wheels were built and have high artistic va

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47

Naarumanchi, Anuroop. "WEAR MECHANISM OF INTERMETALLIC BONDED DIAMOND COMPOSITE FOR GRINDING WHEELS." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1572.

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In the present work, wear mechanism of intermetallic bonded diamond is studied, and wear of intermetallic bonded diamond is compared to current grinding wheel and tungsten carbide. In previous work research conducted on IBD's, diamonds are successfully dispersed in intermetallic alloy of nickel aluminde and tungsten carbide, sintered at 1400⁰C without forming graphite. IBD samples are outperforming materials used for wear resistance replacing tungsten carbide cermets, polycrystalline diamond composites. Rubbing current grinding wheel against IBD, if current grinding wheel wear is more than dia

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48

Pruti, Faruk. "Development of composite grinding wheels for hard and soft metals." Thesis, University of East London, 2012. http://roar.uel.ac.uk/1440/.

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This research investigates the performance of grinding wheel in terms of its internal granular particles and their effect on the surface finish for both soft and hard metals subjected to both dry and wet conditions of use. The study considers the properties of materials of construction including hardness of the granular particles and their size and distributions that affects the grinding wheel efficiency in abrading of soft and hard metal surfaces. Furthermore, in order to improve grinding performance, the mechanism of clogging the cutting surface of the grinding wheel as a function of for exa

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49

QUARANTA, EMANUELE. "Investigation and optimization of the performance of gravity water wheels." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2674225.

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Water wheels are rotating hydraulic machines that were introduced thousands of years ago to generate energy from water. Gravity water wheels are driven by the weight of the water flow and a portion of the flow kinetic energy. In the last decades, due to the increasing diffusion of micro hydropower plants (installed power less than 100 kW), gravity water wheels are being recognized as attractive hydraulic machines to produce electricity. Unfortunately, most of the engineering knowledge on water wheels is dated back to the XIX century, with several gaps and uncertainty. Additional work is still

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WEN, CHAO-YUAN, and 溫兆源. "Control of single spherical wheel robot driven by omni wheels." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/02545169972589006627.

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碩士<br>中華大學<br>電機工程學系碩士班<br>99<br>This thesis mainly discusses the control of a spherical robot using Omni wheels to drive a spherical wheel. The dynamical model is derived from Euler Lagrange approach. Therefore, seven different control methods are presented which can achieve a constant speed at a vertical balance altitude. The proposed control methods can be categorized into two algorithms. The first algorithm is the variable structure system control (VSSC) in which the time needed to enter the sliding surface or to reach the stable point can be adjusted by parameters. The second one is the n

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