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Dissertations / Theses on the topic 'Machinery Machine-tools'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Kanburoglu, Furkan A. "Distributed Control System For Cnc Machine Tools." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610599/index.pdf.

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&ldquo<br>Numerically Controlled&rdquo<br>(NC) machine tools, which are automatically operated by encoded (digital) commands, are capable of machining components with quality and quantity. Manufacturing industry heavily depends on these machines. Many different control architectures have been adapted in today&rsquo<br>s CNC technology. Centralized control system is quite popular in industry due to its ease of implementation. If the number of controlled axes on a CNC machine tool (&gt<br>3), increases so does the computational burden on the central processors. Hence, more powerful processors

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2

Postlethwaite, Scott R. "Electronic based accuracy enhancement of CNC machine tools." Thesis, University of Huddersfield, 1992. http://eprints.hud.ac.uk/id/eprint/4663/.

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The need for better machine tool accuracy is discussed together with the factors which can affect machine tool accuracy. A study is made of the various techniques adopted for the reduction of errors in machine tools. The concept of error compensation is discussed and the different techniques for error compensation are appraised. A critical appraisal is presented of the work undertaken to date in the field of error compensation. Based on this appraisal a criterion is established for a universally applicable error compensation system. The development of a novel, patented microprocessor based mac

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3

Jiang, Xiaogeng. "Characterising geometric errors in rotary axes of 5-axis machine tools." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5871/.

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It is critical to ensure that a 5-axis machine tool is operating within its geometric tolerance. However, there are various sources of errors influencing its accuracy; testing them with current methods requires expensive equipment and long machine down time. This motivates the development of a simple and fast way to identify and characterise geometric errors of 5-axis machine tools. A method using a Double Ball Bar (DBB) is proposed to characterise rotary axes Position Independent Geometric Errors (PIGEs), which are caused by imperfections during assembly of machine components. An established

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4

Widiyarto, Muhammad Helmi Nur. "Modelling and passive correction investigation of vibration induced machining errors on CNC machine tools." Thesis, University of Huddersfield, 2006. http://eprints.hud.ac.uk/id/eprint/4748/.

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Machine tool vibration is a complex subject requiring a multi-disciplinary approach involving the identification and analysis of the vibration sources and characteristics, as well as its direct and indirect effects. Machine tool vibration is influenced and can be characterised by the machine's structural dynamics, the drive system performance and the cutting force generation. Its effect materialises in the form of poor surface finish of the workpiece, accelerated cuttingtool wear, and chatter during the machining process. This research project investigates vibration-induced errors on a Cincinn

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5

Du, Plessis Lukas Johannes. "Design and optimum operation of a re-configurable planar Gough-Stewart machining platform." Thesis, Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-10312005-140405/.

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6

Holroyd, Geoffrey. "The modelling and correction of ball-screw geometric, thermal and load errors on CNC machine tools." Thesis, University of Huddersfield, 2007. http://eprints.hud.ac.uk/id/eprint/2627/.

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In the modern global economy, there is a demand for high precision in manufacture as competitive pressures drive businesses to seek greater productivity. This results in a demand for a reduction in the errors associated with CNC machine tools. To this end, it is useful to develop a greater understanding of the mechanisms which give rise to errors in machine tool drives. This programme of research covers the geometric, thermal and load errors commonly encountered on CNC machine tools. Several mathematical models have been developed or extended which enable a deeper understanding of the interact

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7

Chmielowiec, Ryszard. "Sewing machine, fabric and thread dynamics." Thesis, University of Leeds, 1993. http://etheses.whiterose.ac.uk/4045/.

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In recent years, sewing technology has witnessed dramatic increases in machines speeds, new types of materials, new sewing threads and evaluation methods – but the principal type of sewing machine remains the lockstitch type and this is likely to remain the most common and versatile for the foreseeable future, particularly for sewing woven fabrics. Sewing machine speed increases lead to a loss of control of the sewing process due largely to an increase of the dynamic forces and consequently to problems such as seam pucker. In this research computer-based instrumentation and high-speed digital

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8

Zheng, Wenbo, and Hongxi Zhong. "Reconfigurable Machine Tools Design Methodology." Thesis, KTH, Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119082.

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In today’s industry, the competitive market, the short life time of the products and rapid change in customer demand forms a big trend of appearance of new manufacturing system. Reconfigurable Machine Tool (RMT) is a kind of solution for future machining systems, thus it can not only provide customized solutions to the operation requirements but also is cost-effective. Thethesis aims to create and implement methodology of RMT design for manufacturing industry. The methodology is introduced and extended according to the five principals of modular machine tool design. The methodology will be app

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9

Águila, Rodríguez Guillermo, and Álamo Alcalde Adrián del. "Identification of machine tools´ locations." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-17432.

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The scope of this thesis will be focused on the machine FORMA Z1 which is one ofthe most functional amongst the sort of machines currently available in the market. Itprovides faster tool changes besides a huge variety of tool layouts with the possibility ofmaking a product with one only set up. Furthermore, the combi-beam rotation capability,together with dual sets of tools, give to the machine an exceptional competence.Through this project, some of the shortcomings in the usability of the machine are evaluatedto be able to give an accurate solution to provide it of extra functionalities, thus

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10

Dhairyawan, Amit. "Internet Tools for Machine Design." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/36488.

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The aim of this thesis is to provide academic support to the oldest discipline of Mechanical Engineering, namely "Machine Design". The rapid pace of technological development drives every individual, especially students. The industrial revolution in the first half of the 19th century contributed greatly to the advancement of Mechanical Engineering. The theories and experimental data from that time, some developed almost a hundred years ago are still in use in the original form while others have evolved to keep up with the times. This thesis attempts to bring some of that classical machine de

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11

Hedderich, Johannes. "Thermal stability in machine tools." Thesis, KTH, Industriell produktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-185117.

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Reliable and stable processes allowing precision manufacturing are a core demand in today’s production. To achieve stable processes several influences on machine tools have to be controlled. Beside the other factors, thermal influences are among the most important factors infecting the production system.In this work two problems that are caused by thermal deviations are considered: Firstly the positioning error of machine tools, and secondly possible changes in the elastic behaviour of a machine tool due to changes in stiffness.Positioning problems due to thermal changes are widely examined in

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12

Newton, Jeffrey Michael. "Vibration control in a machine tool barfeed." Thesis, University of Huddersfield, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254734.

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13

Brus, Alexander. "Validation of energy efficiency requirements for machine tools and industrial washing machines." Thesis, KTH, Energiteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-256062.

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Production equipment accounts for a large portion of the energy use from industry. But so far there has been no standardized way of requiring energy efficiency when purchasing a new machine. Scania is therefore implementing energy efficiency requirements in their purchasing process for production equipment. As a part of this, there needs to be a way of validating that the requirements have been fulfilled. This study aims to find how requirements on energy efficiency in production equipment can be validated in a user friendly and time efficient way. Firstly, the energy efficiency requirements s

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14

Bailey, Trevor Eric. "Generic mechanistic modeling for multi-axis machining /." *McMaster only, 2001.

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15

Centea, Dan Elbestawi Mohamed A. A. "Design, kinematics and dynamics of a machine tool based on parallel kinematic structure." *McMaster only, 2004.

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16

Khʹep, Chan. "A design and analysis of an active deformable cutter /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2004.

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Thesis (Ph.D.)--Tufts University, 2004.<br>Advisers: Haris Doumanidis; Anil Saigal; Nikos Fourligkas. Submitted to the Dept. of Mechanical Engineering. Includes bibliographical references (leaves 72-73). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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17

Cheatham, Robert Marshall. "A geometry-based motion planner for direct machining and control / /." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1983.pdf.

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18

Greenough, Jeremy David. "Design and analysis of the SVOBODA mechanism as a hybrid machine." Thesis, Liverpool John Moores University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361541.

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19

Ford, D. G. "A CAD/CAE aid to design of a machine tool system." Thesis, University of Huddersfield, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280654.

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20

Wang, Nan. "Tool path generation method for 5-axis NC machining with flat-end cutter /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MECH%202009%20WANG.

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21

Whittingham, Ben. "Applications of the kinematic modelling of a parallel kinematic mechanism machine tool." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272714.

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22

Van, den Berg Gideon. "Hidden Markov models for tool wear monitoring in turning operations." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-05302005-114238/.

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23

Hall, Carsie Alvin. "Evaporative cooling effects in precision machine tools." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36012.

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24

Renuka, Shivaswaroop R. "Development of models of CNC machines - EMCO VMC100 and EMCO TURN120P in virtual NC." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178046654.

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25

Wiggins, John Sterling. "Design and specification of a PC-based, open architecture environment controller." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17299.

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26

Chiou, Shen-Tarng. "Studies of retrofit and new designs for reducing the shaking force of a can body-making machine." Thesis, Loughborough University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305649.

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27

Juckem, John R. "Aligning Sheboygan Area School District's metals/manufacturing machine tool curriculum to meet local needs." Menomonie, WI : University of Wisconsin--Stout, 2005. http://www.uwstout.edu/lib/thesis/2005/2005juckemj.pdf.

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28

Fleisig, Robert V. "Motion command generation for multi-axis machining /." *McMaster only, 2000.

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29

El-Mounayri, Hazim A. "Generic solid modelling based machining process simulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ30083.pdf.

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30

Wong, Wing-yiu. "An octree and face oriented approach for NC machining /." [Hong Kong : University of Hong Kong], 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12385852.

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31

Olson, Kevin. "Set up reduction and standardization for computer numerical control pulley cell at West Industries, Inc." Online version, 1998. http://www.uwstout.edu/lib/thesis/1998/1998olsonk.pdf.

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32

Sievert, Marilyn Kay. "In-house certification CNC training and certification /." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999sievertm.pdf.

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33

Mostert, Pierre Frans. "Computer numerical controlled drilling machine interfaced to a computer aided design package." Thesis, [S.l. : s.n.], 1996. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1058&context=td_ptech.

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34

Quesada, Robert E. "Alternative assessment of computer numerical control (CNC) machine tool students." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999quesada.pdf.

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35

Harby, Donald. "Parametric and optimal design of modular machine tools." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4871.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on February 13, 2008) Vita. Includes bibliographical references.

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36

Park, Hyung Wook. "Development of micro-grinding mechanics and machine tools." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22692.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Dr. Steven Y. Liang; Committee Member: Dr. Chen Zhou; Committee Member: Dr. Paul Griffin; Committee Member: Dr. Shreyes N. Melkote; Committee Member: Dr. Steven Danyluk.

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37

Kanwar, John. "Smart cropping tools with help of machine learning." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74827.

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Machine learning has been around for a long time, the applications range from a big variety of different subjects, everything from self driving cars to data mining. When a person takes a picture with its mobile phone it easily happens that the photo is a little bit crooked. It does also happen that people takes spontaneous photos with help of their phones, which can result in something irrelevant ending up in the corner of the image. This thesis combines machine learning with photo editing tools. It will explore the possibilities how machine learning can be used to automatically crop images in

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38

Mintz, David J. "Models for the development of precision machine tools." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/105290.

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39

Law, Mohit. "Position-dependent dynamics and stability of machine tools." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44804.

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Machine tool’s productivity and ability to produce a component of the required quality is directly influenced by its dynamic stiffness at the tool center point. Lack of dynamic stiffness may lead to unstable regenerative chatter vibrations which are detrimental to the performance. The chatter vibrations are influenced by the changing structural dynamics of the machine as the tool moves along the tool path, resulting in position-varying machining stability of the system. Evaluation of these varying dynamics at the design stage is a complex process, often involving the use of large order finite

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40

Ihlenfeldt, Steffen, Christian Brecher, Matthias Putz, and David Billington. "Conference on Thermal Issues in Machine Tools: Proceedings." Verlag Wissenschaftliche Scripten, 2018. https://tud.qucosa.de/id/qucosa%3A32644.

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Inhomogeneous and changing temperature distributions in machine tools lead to sometimes considerable quality problems in the manufacturing process. In addition, the switching on and off of aggregates, for example, leads to further fluctuations in the temperature field of machine tools. More than 100 specialists discussed these and other topics from the field of thermal research at the 1st Conference on Termal Issues in Machine Tools in Dresden from 22 to 23 March.:Efficient modelling and computation of structure-variable thermal behavior of machine tools S. Schroeder, A. Galant, B. Kauschinger

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41

Adams, Andrew. "Tools and techniques for machine-assisted meta-theory." Thesis, University of St Andrews, 1997. http://hdl.handle.net/10023/13382.

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Machine-assisted formal proofs are becoming commonplace in certain fields of mathematics and theoretical computer science. New formal systems and variations on old ones are constantly invented. The meta-theory of such systems, i.e. proofs about the system as opposed to proofs within the system, are mostly done informally with a pen and paper. Yet the meta-theory of deductive systems is an area which would obviously benefit from machine support for formal proof. Is the software currently available sufficiently powerful yet easy enough to use to make machine assistance for formal meta-theory a v

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42

GaragiÄ‡, Denis. "Contouring control of Stewart platform based machine tools /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486402288261907.

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43

Chen, Fan. "Active damping of machine tools with magnetic actuators." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/51547.

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Flexible parts and tools are often found in machining operations, such as boring large cylinders, or turning long and slender shafts. The excessive flexibility of such tool or shaft may cause static deflection, forced vibration, and even chatter vibrations, which result in poor surface finish, tool breakage, and even damage to the machine, and thus become the main constraints in achieving higher productivity. This thesis presents an active damping solution to such problems, by using a novel three degrees of freedom linear magnetic actuator, which can increase the damping and stiffness of fle

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44

Thomas, I. "The design, and manufacture of a 1.0MN rotary forging machine and a study of the rotary forging of metallic solids." Thesis, City University London, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375824.

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45

Moscrop, Jeffrey William. "Modelling, analysis and control of linear feed axes in precision machine tools." Access electronically, 2008. http://ro.uow.edu.au/theses/27.

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46

Stander, Cornelius Johannes. "The passive control of machine tool vibration with a piezoelectric actuator." Diss., University of Pretoria, 2000. http://hdl.handle.net/2263/23038.

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Please read the abstract in the section 00front of this document<br>Dissertation (M Eng (Mechanical Engineering))--University of Pretoria, 2000.<br>Mechanical and Aeronautical Engineering<br>unrestricted

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47

Joule, David. "A finite element and experimental determination of the temperature distribution in a gearbox with particular reference to machine tool thermal analysis." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329010.

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48

Chen, Austin Hua-Ren. "Integrated Inspection for Precision Part Production." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14586.

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This research develops a methodology for enhancing the performance of a precision computer numerically controlled (CNC) machine tool. The ability to precisely maintain the desired relative position between the cutting tool and the workpiece along the cutting trajectory has a major impact on the dimensional accuracy of the finished part. It is important to ensure that the workpiece geometry satisfies tolerances before removing it from the machine tool. Traditional manufacturing procedures do not catch bad parts until the post-process inspection stage, when the part has already been removed f

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49

Davis, Tyler A. "Flexible machine tool control for direct, in-process dimensional part inspection /." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd478.pdf.

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50

Benner, Peter, Thomas Bonin, Heike Faßbender, Jens Saak, Andreas Soppa, and Michael Zaeh. "Novel Model Reduction Techniques for Control of Machine Tools." Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901837.

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Computational methods for reducing the complexity of Finite Element (FE) models in structural dynamics are usually based on modal analysis. Classical approaches such as modal truncation, static condensation (Craig-Bampton, Guyan), and component mode synthesis (CMS) are available in many CAE tools such as ANSYS. In other disciplines, different techniques for Model Order Reduction (MOR) have been developed in the previous 2 decades. Krylov subspace methods are one possible choice and often lead to much smaller models than modal truncation methods given the same prescribed tolerance threshold.

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