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Tesi sul tema "Machine design"
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1
Aijaz, Adnan. "Protocol design for machine-to-machine networks". Thesis, King's College London (University of London), 2014. https://kclpure.kcl.ac.uk/portal/en/theses/protocol-design-for-machinetomachine-networks(afa66e02-39e0-47fc-b496-e5e7bd86f74c).html.
Testo completoAbstract (sommario):
Machine-to-Machine (M2M) communications is an emerging communication paradigm that provides ubiquitous connectivity between devices along with an ability to communicate autonomously without human intervention. M2M communications acts as an enabling technology for the practical realization of Internet-of-Things (IoT). However, M2M communications differs from conventional Human-to-Human (H2H) communications due to its unique features such as massive number of connected devices, small data transmissions, little or no mobility, requirements of high energy efficiency and reliability, etc. These features create various challenges for existing communication networks which are primarily optimized for H2H communications. Therefore, novel solutions are required to meet the key requirements of M2M communications. In addition, enhancements are required at different layers of the protocol stack to support co-existence of M2M devices and H2H users. The main objective of this research is to investigate the challenges of M2M communications in two broad types of M2M networks; capillary M2M and cellular M2M networks. The primary focus is on developing novel solutions, algorithms, and protocol enhancements for successfully enabling M2M communications. Since cognitive radio technology is very promising for M2M communications, special emphasis is on capillary M2M networks with cognitive radio based Physical layer. Besides, the focus is also on exploring new frontiers in M2M communications. This thesis covers different aspects of M2M communications. Considering the motivation for cognitive M2M and service requirements of M2M devices, two cognitive MAC protocols have been proposed. The first protocol is centralized in nature and utilizes a specialized frame structure for co-existence with the primary network as well as handling different Quality-of-Service (QoS) requirements of M2M devices. The second protocol is a distributed cognitive MAC protocol, which is specially designed to provide high energy efficiency and reliability for M2M devices operating in challenging wireless environments. Both protocols explicitly account for the peculiarities of cognitive radio environments. The protocols have been evaluated using analytical modeling and simulation studies. Recently IETF has standardized a specially designed routing protocol for capillary M2M networks, known as RPL (Routing for Low Power and Lossy Networks). RPL is emerging as the de facto routing protocol for many M2M applications including the smart grid. On the other hand, the application of cognitive radio for smart grid communication is under active investigation in the research community. Hence, it is important to investigate the applicability and adaptation of RPL in cognitive radio environments. In this regard, an enhanced RPL based routing protocol has been proposed for cognitive radio enabled smart grid networks. The enhanced protocol provides novel modifications to RPL for protecting the primary users along with meeting the utility requirements of the secondary network. An important challenge in LTE-based cellular networks with M2M communications is the uplink radio resource management as available resources are shared between M2M devices and H2H users, having different and often conflicting QoS requirements. Apart from this, energy efficiency requirements become critically important. Further, the specific constraints of Single Carrier Frequency Division Multiple Access (SC-FDMA) complicate the resource allocation problem. In this respect, an energy efficient resource allocation algorithm for the uplink of LTE networks with M2M/H2H co-existence under statistical QoS guarantees has been developed, that is based on canonical duality theory. The proposed algorithm outperforms classical algorithms in terms of energy efficiency while satisfying the QoS requirements of M2M devices and H2H users. A new frontier in M2M communications is the nano-M2M communications, which is envisioned to create the Internet-of-Nano-Things (IoNT). Molecular communication (MC) is a promising communication technique for nano-M2M communications. In literature, no model for error performance of MC exists. Therefore, an error performance model has been developed that explicitly accounts for noise and interference effects. Since relaying and network coding based solutions are gaining popularity for nano-M2M networks, the error performance of a network coded molecular nano-M2M network has been evaluated as well. Finally, the thesis is concluded based on the overall picture of the research conducted. In addition, some directions for future work are included as well.
2
Kivistö-Rahnasto, Jouni. "Machine safety design : an approach fulfilling European safety requirements /". Espoo [Finland] : Technical Research Centre of Finland, 2000. http://www.vtt.fi/inf/pdf/publications/2000/P411.pdf.
Testo completo
3
Hochmuth, Carsten Alexander. "Rapid machine tool design". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9373.
Testo completoAbstract (sommario):
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.Includes bibliographical references (p. 206-208).
Rapid Machine Tool Design encompasses new materials and manufacturing and design processes that increase the speed and flexibility of the machine tool development process. Rapid design implies increased concurrency and overlap of design process steps, and it allows a quick and efficient response to market opportunities for new types of components or machinery. Rapid manufacturing implies use of new materials with reduced lead times for tooling and "one-off" components, simplified and deterministic processes and cost effective methods for customization and modular system design. This thesis describes design and manufacturing methods for polymer concrete structures in precision machine tools. The focus is on the modularity and unique capabilities of this process for rapid development of manufacturing equipment. Detailed material properties and process descriptions are presented. Traditionally, only the polymer concrete casting process is described, and the thesis expands on the discussion by reviewing the design process and other phases of the full machine tool life cycle. An understanding of the critical factors in the material composition and processing helps the designer understand possible variations in the polymer concrete mechanical properties and quality. This thesis contributes to the body of work on polymer concrete by providing a detailed guide for designing structural components, with analytical tools were applicable and examples from an actual machine design project. This thesis presents a comprehensive set of new design guidelines on how to build polymer concrete parts and tooling, merging the needs of the machine designer and the tooling builder. The thesis also presents a case study of a complete machine tool design with a polymer concrete structure. Methods and guidelines described in this thesis are successfully applied in the development and manufacture of the machine tool. The case study and the design chapters demonstrate that use of polymer concrete can be an enabling element for rapid machine tool design.
by Carsten Alexander Christoph Hochmuth.
Ph.D.
4
Sahoo, Shibashankar. "Soft machine : A pattern language for interacting with machine learning algorithms". Thesis, Umeå universitet, Designhögskolan vid Umeå universitet, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-182467.
Testo completoAbstract (sommario):
The computational nature of soft computing e.g. machine learning and AI systems have been hidden by seamless interfaces for almost two decades now. It has led to the loss of control, inability to explore, and adapt to needs and privacy at an individual level to social-technical problems on a global scale. I propose a soft machine - a set of cohesive design patterns or ‘seams’ to interact with everyday ‘black-box’ algorithms. Through participatory design and tangible sketching, I illustrate several interaction techniques to show how people can naturally control, explore, and adapt in-context algorithmic systems. Unlike existing design approaches, I treat machine learning as playful ‘design material’ finding moments of interplay between human common sense and statical intelligence. Further, I conceive machine learning not as a ‘technology’ but rather as an iterative training ‘process’, which eventually changes the role of user from a passive consumer of technology to an active trainer of algorithms.
5
Zheng, Wenbo, e Hongxi Zhong. "Reconfigurable Machine Tools Design Methodology". Thesis, KTH, Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119082.
Testo completoAbstract (sommario):
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 applied step by step herein so as to make the methodology more clear. First of all is to get the concept or process requirements from the customer. The customer requires three reconfigurable part families for a high speed milling application including tables, spindles, and cutters. In this case, to fulfill customer’s requirements and concept, the dual spindle (Multi-tool) RMT is selected as an example to interpret the RMT design methodology. Secondly, the most important point in methodology of RMT design is to analyze the valuable proposal of the four principles of modular design based on extensive experience. This work turns the four principles, separation, and unification (standardization), connection, and adaptation, to practical design methodology. Based on the classical four principles, the principle of reusability is an addition principal in consider of zero waste concept. In order to perform the RMT design methodology effectively, it is necessary to complement the advantages of the reconfiguration in dual spindle RMT design and the reconfiguration for other part families in according to the RMT design methodology. A final step utilizes computer software to model the configuration in 3 dimensions. And evaluations can be discussed in Degree of Freedom (DOF), stiffness analysis and number of modules.
6
Rajabi, Moghaddam Reza. "Synchronous Reluctance Machine (SynRM) Design". Thesis, KTH, Elektrisk energiomvandling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153663.
Testo completoAbstract (sommario):
The Synchronous Reluctance Motor (SynRM) has been studied. A suitable machine vector modelhas been derived. The influence of the major parameters on the motor performance has beentheoretically determined.Due to the complex rotor geometry in the SynRM, a suitable and simple combined theoretical(analytical) and finite element method has been developed to overcome the high number ofinvolved parameters by identifying some classified, meaningful, macroscopic parameters.Reducing the number of parameters effectively was one of the main goals. For this purpose,attempt has been made to find and classify different parameters and variables, based on availableliteratures and studies. Thus a literature study has been conducted to find all useful ideas andconcepts regarding the SynRM. The findings have been used to develop a simple, general, finiteelement aided and fast rotor design procedure. By this method rotor design can be suitablyachieved by related and simplified finite element sensitivity analysis.The procedure have been tested and confirmed. Then it is used to optimize a special rotor for aparticular induction machine (IM) stator. This optimization is mainly focused on the torquemaximization for a certain current. Torque ripple is also minimized to a practically acceptablevalue. The procedure can also be used to optimize the rotor geometry by considering the othermachine performance parameters as constrains.Finally full geometrical parameter sensitivity analysis is also done to investigate the influence ofthe main involved design parameters on the machine performance.Some main characteristics like magnetization inductances, power factor, efficiency, overloadcapacity, iron losses, torque and torque ripple are calculated for the final designs and in differentmachine load conditions.Effects of ribs, air gap length and number of barriers have been investigated by means of suitableFEM based method sensitivity analysis.
7
Bamberg, Eberhard 1966. "Principles of rapid machine design". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88839.
Testo completo
8
Langevald, Joris. "Machine learning in quaywall design". Thesis, KTH, Jord- och bergmekanik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302648.
Testo completoAbstract (sommario):
Today we live in a world where technology is changing the world and projects around us at a rapid pace. It is believed companies will have to change their operations to maintain an edge. At Movares, a Dutch engineering consultancy firm, they recognize the importance of digital transformation. Their goal is to apply digital transformation to their day-to-day operations enabling engineers to focus on innovation. One of these operations concerns the optimization of quay wall designs. In this thesis, an automated optimization routine for the design of qual walls is suggested. The design of Quay walls is influenced by site-specific variables and design variables. Currently at Movares, the design variables are determined based on engineering judgement a combination of norms, experience, and data. The lack of an integral analysis of the design variables makes it difficult to judge the efficiency of the designin terms of costs. Furthermore, the speed of this trial-and-error based approach is limited by the designer interacting with the analysis software. The automated optimization routines suggested in this thesis try to pose a solution to these problems. In an automated routine, the task of the engineer shifts from evaluating results to formulating an optimization problem. The engineer operates at a higher level and an algorithm is responsible for evaluating the intermediary results. The proposed routines can be best described as a databased or data-driven routine and a hybrid routine. The databased routine bases its evaluation solely on data and relies on statistical tools to extract insight. For the design of quay walls, this data includes soil properties, soil geometry and design variables. The hybrid optimization routine combines the use of data with a theory-based model. A theory-based model in contrast to databased models is based on scientific understanding of a system or process, e.g., determining slope stability with Bishop’s method, or soil behavior under cyclic loading. From the work in this thesis, it is shown hybrid optimization routines were able to identify the optimum with respect to costs within an acceptable timeframe. With the use of Machine learning techniques, the total computation time was significantly reduced compared to uninformed sampling techniques.Vi lever idag i en värld där teknologin snabbt utvecklas. Företag måste förändra och utveckla sin verksamhet för att upprätthålla ledande teknik. Vid det Holländska konsultföretaget Movares har man insett vikten av digital utveckling. Målet är att tillämpa digitala verktyg i det dagliga arbetet för att möjliggöra fokus på innovation. En av dessa tillämpningar är dimensionering av kajväggar. I detta examensarbete föreslås en automatiserad optimeringsrutin för dimensionering av kajväggar. Idag påverkas designen främst av platsspecifika variabler som bestäms baserat på ingenjörsmässiga bedömningarsom baseras på normer, dimensioneringsmodeller, materialegenskaper och erfarenhet. Bristen på integrerad analys av designvariabler gör det svårt att bedöma effektiviteten i designprocessen med avseende på kostnaderna. Dessutom är hastigheten på denna ”trial-and-error” process begränsad av mänsklig interaktion med mjukvara. Den automatiserade optimeringsrutinen som föreslås i detta examensarbete försöker lösa dessa problem. I en automatiserad rutin så är ingenjörens uppgift att skifta från att utvärdera resultat till att formulera optimeringsproblem. Ingenjören arbetar på en högre nivå och en algoritm ansvarar för att utvärdera de mellanliggande resultaten. De föreslagna rutinerna kan beskrivas som en databaserad eller datadriven modellfri rutin och en hybridrutin. Den databaserade rutinen baserar sin utvärdering enbart på data och bygger på statistiska verktyg för att extrahera insikt. För konstruktion av kajväggar inkluderar dessa data markegenskaper, jordgeometri och konstruktionsvariabler. Den modellfria rutinen beskrivs bäst som en databaserad modell som enbart baserarsin utvärdering på data. Hybridoptimeringsrutinen kombinerar användningen av data med en teoribaseradmodell. En teoribaserad modell i motsats till databaserade modeller är baserad på vetenskaplig förståelse för ett system eller en process, t.ex. bestämning av stabilitet med Bishop´s-förenklade metod eller jordens beteende under cyklisk belastning. Arbetet i denna studie påvisar att hybridoptimeringsrutiner kan identifiera det optimala med avseende påkostnader inom en rimlig tidsram. Med användning av maskininlärningstekniker reducerades den totalaberäkningstiden betydligt jämfört med oinformerad provtagningsteknik.
9
Dhairyawan, Amit. "Internet Tools for Machine Design". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/36488.
Testo completoAbstract (sommario):
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 design theory into a modern user-friendly form that is portable across the Internet.
Here the user will be presented with an interactive menu of topics of Machine Design where each is split sub-categorically as Theory and Application.
According to the choice made, short excerpts of theory are presented on the chosen matter. The theory will include but not be limited to the important relationships relevant to the design of the particular machine element.
After the review of the Theory, the user will be able to navigate to the application where the relationships from the theory will be awaiting user input in the form of solvers.
Since the primary emphasis of the thesis is about cultivating knowledge of the underlying theory, the applications will not be self-correcting or self-assuming.
The user will need to understand the relationships sufficiently well prior to using the applications to solve homework or design assignments.
The created Toolbox is available to all registered users through a login access. The user can then choose to review theory or directly access the applications of the described theory.
The thesis successfully demonstrates the use of the Internet as the media for education.Master of Science
10
Farhan, Uday Hameed. "An integrated system to design machine layouts for modular special purpose machines". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2018. https://ro.ecu.edu.au/theses/2081.
Testo completoAbstract (sommario):
This thesis introduces the development of an integrated system for the design of layouts for special purpose machines (SPMs). SPMs are capable of performing several machining operations (such as drilling, milling, and tapping) at the same time. They consist of elements that can be arranged in different layouts. Whilst this is a unique feature that makes SPMs modular, a high level of knowledge and experience is required to rearrange the SPM elements in different configurations, and also to select appropriate SPM elements when product demand changes and new layouts are required. In this research, an integrated system for SPM layout design was developed by considering the following components: an expert system tool, an assembly modelling approach for SPM layouts, an artificial intelligence tool, and a CAD design environment. SolidWorks was used as the 3D CAD environment. VisiRule was used as the expert system tool to make decisions about the selection of SPM elements. An assembly modelling approach was developed with an SPM database using a linked list structure and assembly relationships graph. A case-based reasoning (CBR) approach was developed and applied to automate the selection of SPM layouts. These components were integrated using application programing interface (API) features and Visual Basic programming language. The outcome of the application of the novel approach that was developed in this thesis is reducing the steps for the assembly process of the SPM elements and reducing the time for designing SPM layouts. As a result, only one step is required to assemble any two SPM elements and the time for the selection process of SPM layouts is reduced by approximately 75% compared to the traditional processes. The integrated system developed in this thesis will help engineers in design and manufacturing fields to design SPM layouts in a more time-effective manner.
11
Haek, Mohamad Brimo. "Design of the tripod polishing machine". Honors in the Major Thesis, University of Central Florida, 1995. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/140.
Testo completoAbstract (sommario):
This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.Bachelors
Engineering
Mechanical Engineering
12
Mukolera, J. "Logic programming in electrical machine design". Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/47359.
Testo completo
13
Wilhelm, Eric Jamesson 1977. "Design of a liquid embossing machine". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8539.
Testo completoAbstract (sommario):
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (leaves 97-98).
A machine was designed to pattern thin films of liquid by liquid embossing. 10 designs were prototyped and evaluated according to pattern transfer, alignment, and ability to emboss large area. The final design utilizes a PDMS stamp cast such that it seals an air cavity, which is then pressurized to slightly bow the stamp. The cavity is clear so alignment can be accomplished by optical feedback using a camera and microscope objective. The theory of liquid embossing is discussed. PDMS has a very high contact angle with most fluids and so it is able to clear liquid from channels approximately 5 [mu]m wide. The wettability of the substrate is modified after being in contact with PDMS so the liquid does not reflow into the channels. Sub-micron alignment between layers was achieved. Vector plots of runout between layers are given. Electrical yield was found to be 89% and was not negatively correlated by stamp age up to 1000 dry stamps. The stamps were found to wear, but due to their conformal nature this did not affect pattern transfer. Structures created by the liquid embossing machine include electrostatic actuators, test patterns with 100 nm features, vias, under-etched metal layers, and released cantilevers.
by Eric J. Wilhelm.
S.M.
14
Reed, Kate. "Machine learning applications in generative design". Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/43444.
Testo completoAbstract (sommario):
The work in this thesis studies some of the potential applications of machine learning in the field of generative design. In particular it looks at how the design process can be automated once sufficient data about the design space has been collected and machine learning used to find the relationship between the design and its properties. The case study chosen for the work is the design of chairs. Preliminary work was done including the development of a parametric chair modelling program (ChairMaker) that can produce a wide range of chair designs and a series of simulations, including an automated ergonomic model, that were used to find fitness scores for desirable chair properties. New chair designs were then generated. Initially by using a well-established method; evolutionary design, using decision trees trained on the simulation data as the fitness function. The results were good, with many new viable chair designs produced. A new generative method called the schema method was also developed. It extracts sets of constraints (called schemata) directly from the decision trees and uses these to generate new chairs. The schema method proved to be extremely efficient at finding viable chairs. Hundreds of diverse, original chairs can be produced within a few seconds. The idea of visual similarity was explored by using the schemata to measure the difference between two chairs. The results showed a remarkably high correlation between the volunteers considering the subjective nature of the task. The results demonstrate that it is possible to use simulated data and machine learning to make design decisions in generative design. We have shown this through the use of an existing algorithm and an original method. The new method is novel as it uses the learned knowledge about the design space directly to generate designs rather than using a search algorithm.
15
Subramanian, Anuj. "Mechanical Design Desktop for Machine Elements". Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34877.
Testo completoAbstract (sommario):
The design of machine elements such as belts,
chain and sprocket, gears, cams, bearings, etc.,
is a complex procedure. The analytical procedure
to design such elements is non-linear, often based
upon statistical information and frequently
heuristic in nature. The procedure is iterative
and involves choosing various weighing factors
based upon the application and usage. The
procedure is greatly influenced by a designer's
intuitive skill and experience. Due to the
increased popularity of the Internet as a source
of information, a number of machine element
manufacturers have published design procedures
for the design of machine elements. Here, an
attempt has been made to arrange all the formulae,
tables, charts, standards, and web resources,
which are inherent to the design process,
to best aid the designer.
A number of computer applications for machine
design have been developed in the recent past
but are limited in scope and utility as they tend
to allow the designer to change only certain
parameters while assigning fixed values to most
parameters. This stifles the designer's creativity
and diverts focus on the computer program rather
than the physical problem. An attempt has been
made here to allow the designer flexibility in
design and increased productivity, by keeping a
record of the various steps undertaken by the
designer, in a particular design process.Master of Science
16
Goussard, Charl Leonard. "Design analysis of a lomolding machine". Thesis, Link to the online version, 2007. http://hdl.handle.net/10019.1/1199.
Testo completo
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Resiga, Alin. "Design Optimization for a CNC Machine". PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4257.
Testo completoAbstract (sommario):
Minimizing cost and optimization of nonlinear problems are important for industries in order to be competitive. The need of optimization strategies provides significant benefits for companies when providing quotes for products. Accurate and easily attained estimates allow for less waste, tighter tolerances, and better productivity. The Nelder-Mead Simplex method with exterior penalty functions was employed to solve optimum machining parameters. Two case studies were presented for optimizing cost and time for a multiple tools scenario. In this study, the optimum machining parameters for milling operations were investigated. Cutting speed and feed rate are considered as the most impactful design variables across each operation. Single tool process and scalable multiple tool milling operations were studied. Various optimization methods were discussed. The Nelder-Mead Simplex method showed to be simple and fast.
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KOWALSKI, JO-ANNE. "Dead Skin, Living Machine : textile under surgery". Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17417.
Testo completoAbstract (sommario):
Dead Skin, Living Machine is a process of making / building textile dead skin as inspirational source with respect to textile interaction. Knits are elaborated within perception, identity and interaction as witnesses of object's life in our environment, while the act of knitting is wildly ruled by its own responsive potential. Knitting and videos dialog work tend to explore the emergence of textile material.Program: Master Programme in Fashion Design
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Sethi, Swasti. "Marti : A washing machine that grows with you". Thesis, Konstfack, Industridesign, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7338.
Testo completoAbstract (sommario):
A ubiquitous household appliance, the washing machine currently sees a fall in its usage life to a mere 7 years, with valuable and finite resources getting lost to the landfill faster than ever. The reason? Mechanical obsolescence and barriers in repair that make helpless users as far removed from the process as possible. The goal of my degree project is to create long lasting product and service experiences through easier channels of repair and to design deeper partnerships between humans and the appliances that surround them. I want to be part of a rising sustainability movement that aims for a seismic shift in thinking by creating resilient product experiences. Can the key to a sustainable future be appliances that last for generations?
20
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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Multáňová, Katarína. "Design vstřikovacího lisu". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229377.
Testo completoAbstract (sommario):
Diploma thesis deals with the development of injection moulding machine design. It is a type of industrial machine, which is designed for production of plastic parts by technology of compression molding. Injection and closing units in the machine are vertical orientated to each other. Injection moulding machine is equipped with rotary table. The main task of diploma work is to design an injection moulding machine with original shape for the future. Conception of the machine is based on present progresive technical solutions. Design of the machine tolerates main ergonomic demands and make the work for operating personnel easier.
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RAJAGANAPATHY, SUNDAR VISHAL. "Concept Generation Techniques for Machine Tool Design". Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281741.
Testo completoAbstract (sommario):
Technological advancements are reaching new milestones in modern world. The demand for innovations and discoveries in each field is growing greater. This is the challenge in front of product designers. This thesis is about designing a mechanism for a machine tool. Machining tools are used from manual lathes to modern automated Computer Numerical Control machines. Turning operation is one of the basic stages in machining workpiece. Wiper inserts are used in final stage of turning for better surface finish due to their multi-point radii. But to use efficiently, positioning tool edge is necessary. Requirements are drafted based on this objective. So, developing a mechanism to perform this function is the foundation. Understanding various concept generation techniques in design field is necessary. Such techniques are described in literature section and later applied in thesis. A systematic approach is drafted for developing concepts. Then concepts are developed using these techniques. These concepts are evaluated based on weightage criteria. Then concepts are selected for detail design and prototype manufacturing. These chosen concepts are simulated to validate and to analyse mechanical properties. It is concluded that one simple concept is better than others in performance and utility. Finally, the thoughts for future work are stated. This work provides a brief idea on approaching product development.Tekniska framsteg når nya milstolpar i den moderna världen. Efterfrågan på innovationer och upptäckter inom varje område blir större. Detta är utmaningen för produktutvecklare. Det här examensarbetet handlar om att designa en mekanism för ett verktygsmaskin. Verktygsmaskiner används i allt från manuella svarvar till moderna automatiserade numeriskt styrda verktygsmaskin. Svarvning är ett av grundstegen i bearbetningen av ett arbetsstycke. Wiperskär används i slutskedet av svarvning för bättre ytfinish (ytfinhet) tack vare flerpunktsradier. Men för att ett wiperskär ska kunna navändas efektivt är positionering av verktygskanten nödvändigt. Krav för urformas utifrån detta mål och att utveckla en mekanism för att utföra den här funktionen är därmed grundläggande. Förståelse för olika konceptgenereringstekniker inom design är nödvändig. Sådana tekniker beskrivs i litteraturavsnittet och tillämpas senare i examensarbetet. Ett systematiskt tillvägagångssätt utarbetas för att utveckla koncepten. Sedan utvecklas koncepten med dessa tekniker. Dessa koncept utvärderas utifrån viktningskriterier. Sedan väljs koncept för detaljdesign och prototyptillverkning. Dessa valda koncept simuleras för att validera och analyseras mekaniska egenskaper. Slutsatsen är att ett enkelt koncept är bättre än andra när det gäller prestanda och nytta. Slutligen formuleras förslag på framtida arbete. Detta arbete ger inblick i hur det är att närma sig produktutveckling.
23
Smith, Albert Cowper III. "Architectural model as a machine". Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/22978.
Testo completo
24
Miao, Shan. "Six legged walking machine gait and design". Thesis, University of Salford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300830.
Testo completo
25
Toulkeridou, Varvara. "Dynamic descriptions : steps towards a design machine". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61561.
Testo completoAbstract (sommario):
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 59-61).
This thesis questions which would be a valid approach for building design machine aided by computational intelligence capable of generating surprises for their designers-observers. There have been efforts since the 1960s towards developing frameworks for design machines that were envisioning computational systems as something more than tools for efficient production and representation. Some of them were dealing with design problems as complex systems that needed to be broken down in modular parts, for example Christopher Alexander's "Notes on the Synthesis of Form". However such strategies were associated with explicit languages of descriptions and strong hierarchies, defined in advance by the designer, that were constraining the design space to what these predefined descriptions were anticipating. This thesis draws its motivation from the work of Professor of Design and Computation George Stiny on visual computations operating on non-fixed sets of primitives, as well as from research conducted in the field of Artificial Intelligence on alternative representations. I will propose a framework for a design machine highlighting the importance of it being able to generate its own dynamic descriptions, "entities" that bear content independent of the interpretations of their designers. Inspired by a computational system, developed by Stephen Larson (2003), capable of grounding its own symbols in perception, I will experiment with self-organizing map algorithms suggesting them as a possible way for a design machine to build up and update its language of description from its perceptual information.
by Varvara Toulkeridou.
S.M.
26
Nayfeh, Samir Ali 1970. "Design and application of damped machine elements". Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9972.
Testo completo
27
Toussaint, Teddy A. (Teddy Antoine). "Design of a frozen fruit smoothie machine". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85782.
Testo completoAbstract (sommario):
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (page 50).
A smoothie machine known as the FruziFridge is being deterministically designed to dispense frozen fruit smoothies. The design is scalable so it can be made available in homes as a built-in module of a refrigerator or in public as a vending machine. The design is compared to previously existing smoothie machine technology and succeeds in fulfilling functional requirements that cater more to the health conscious consumer. The FruziFridge is still a work-in-progress so this text only shows the strategy and concept phase of design and the early stages of the detailed engineering and development phase of design, including verification of the most critical module's concept.
by Teddy A. Toussaint.
S.B.
28
Cohen, Zachary (Zachary Dan Abramson). "Hold up : machine delay in architectural design". Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120385.
Testo completoAbstract (sommario):
Thesis: S.M. in Architecture Studies, Massachusetts Institute of Technology, Department of Architecture, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 138-140).
This thesis introduces an architectural design approach that is founded on working with digital fabrication machines, materials, and time: Machine Delay Fabrication (MDFab). MDFab is characterized by the materialization and manipulation of the time taken by digital fabrication machines to do work. MDFab contrasts with other approaches to digital fabrication that architectural design has appropriated from adjacent fields (for example, human-computer interaction and automated manufacturing). In particular, MDFab is a response to "real-time" digital fabrication techniques, which use embedded sensing to immediately interact with the designer, material, and/or environment. Real-time techniques have negatively distanced architectural designers from material, temporal, and instrumental understanding. Further, the current dependence on real-time points to a future of anti-anticipation: a time in which architectural designers--and human beings, in general-- will not have to anticipate what happens next. MDFab is an alternative to this future: it offers a way to interact with digital fabrication machines that enables architectural designers to advance the material thinking, improvisation, and speculation that are--and should always be--fundamental to the architectural design process. The first part of the paper is concerned with the historical, theoretical, and practical contextualization of MDFab. MDFab is situated within work in both the arts and sciences that has explored the productive potential of delay. These experiments in delay set up critiques of three contemporary architectural design approaches to digital fabrication. These critiques are supplemented by an examination of digital fabrication projects that have opened alternative contexts for architectural design research. The first part concludes with a discussion of the science and practice of curing in concrete fabrication. The second part of this paper is dedicated to the introduction of Machine Delay Fabrication. The foundational concept of MDFab, machine delay, is introduced. The conceptual design implications of MDFab are discussed. The method of 3D printing concrete that was invented to explore MDFab is presented through a detailed account of its design. The findings of the concrete 3D printing exploration are used to speculate on the aesthetic, constructive, and ethical possibilities of MDFab in architectural design. Finally, the work is recontextualized in terms of the not-so-distant future that awaits architectural design practice.
by Zachary Cohen.
S.M. in Architecture Studies
29
Dang, Jie. "Switched reluctance machine electromagnetic design and optimization". Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53908.
Testo completoAbstract (sommario):
The objective of this dissertation is to study the switched reluctance machine (SRM) electromagnetic design and optimization. The research of electric machines is mostly driven by the motivation for higher efficiency and lower cost. The demands for high-performance electric machines also come from the development of emerging industries, such as electric vehicles (EV), hybrid electric vehicles (HEV), renewable energy conversion, energy storage and precision manufacturing. The additional requirements for those applications include volume, weight, speed, torque, reliability, fault tolerance capability, etc. The focus of the research effort is on the high speed and high torque applications, where the SRM stands out compared to other types of machines. The conventional design method significantly depends on the designer’s experience, which uses equivalent magnetic circuit models, and therefore the SRM design is not well developed.
A novel SRM electromagnetic design and optimization method is developed, which uses the current-fed FEA simulation as the SRM performance estimation tool. This method serves as the main innovation of this research work. First, the proposed method is applicable to any SRM topologies and dimension, and no detailed modeling of a specific SRM configuration is required in advance. Therefore, an automated SRM design and optimization approach is developed. Secondly, great accuracy of the SRM electromagnetic analysis, e.g. flux density, torque, and current calculation, is achieved by using FEA simulation instead of simplified magnetic circuit approximations. This contribution is particularly significant when considering the poor accuracy of conventional SRM analytical analysis methods, where several assumptions and approximations are used. Lastly, the proposed design method takes the typical SRM control strategy into account, where the excitation current profile is characterized as a trapezoid. This method adapts the flux linkage of the first FEA simulation result to specify the excitation current profile for the second FEA simulation, so the calculated SRM performance in FEA simulation agrees with the measurement on a practical machine.
The proposed SRM design and optimization method is used for a 12/8 SRM rotor design and for a complete 4/2 SRM design. These design examples validate the applicability of the proposed method to different SRM configurations and dimensions. Detailed design steps are presented for both design cases, and the selection of the parametric design variables are also discussed. The optimization results are demonstrated using multi-dimension diagrams, where the optimal design with the highest torque can be easily identified. The FEA simulation results are compared to the experimental results of a fabricated SRM prototype, and good agreement is found.
In addition, a new rotor configuration with a flux bridge is proposed for an ultra high speed SRM design. The primary motivation of this rotor topology is to reduce the windgae losses and the acoustic noise at a high speed of 50,000 rpm. However, care must be taken for the flux bridge design, and the impact of different flux bridge thicknesses to the SRM performance is studied. Meanwhile, the manufacturing difficulties and the mechanical stresses should also be considered when fabricating the flux-bridge rotor. As a result, two SRM prototypes are built, and the two rotors are one without a flux bridge and one with a flux bridge. The prototypes are tested at different speeds (10,000 rpm, 20,000 rpm and 50,000 rpm) respectively, and the experimental results show good agreement with the FEA simulation results.
30
Di, Nardo Mauro. "Design of high speed synchronous reluctance machine". Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/43223/.
Testo completoAbstract (sommario):
This thesis describes the work done during the several stages of the design, analyse, manufacture and test of a high speed synchronous reluctance machine capable of delivering 5 kW at 80 krpm. In order to meet such demanding speed requirement, several multi-disciplinary design exercises have been carried out having different aims. First the influences of the speed-dependent limiting factors on the machine performance have been investigated by analytical methodologies. After the preliminary analytical design, the main challenges related with the structural and electromagnetic FE-based design refinements have been identified. A comparative study has been then presented with the purpose of identify the most effective rotor design approach in terms of performance of the final design and computational effort related for its achievement. Once the design strategy has been chosen, the advantages of considering rotor parametrization of increasing complexity are evaluated via a comparative study showing the results of several structural optimizations. This study indicated the optimal geometry to manufacture. Prior to the machine prototyping, the influence of the rotor manufacturing tolerance as well as the thermal limitations on the machine performance have been deeply analysed. Tests carried out on the prototype have essentially validated the proposed design approach. In addition, an investigative study aimed at identifying and understanding the reasons of the found discrepancy between the measured and expected performance is also reported.
31
GAMBA, MATTEO. "Design of non conventional Synchronous Reluctance machine". Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2669965.
Testo completoAbstract (sommario):
Synchronous reluctance (SyR) and Permanent magnet Synchronous Reluctance (PM-SyR) machines represent an answer to the growing emphasis on higher efficiency, higher torque density and overload capability of ac machines for variable-speed applications. Their high performance is particularly attractive in electric traction and industry applications. The SyR technology represents a convenient solution to obtain high efficiency machines at reduced cost and high reliability. The manufacturing costs are comparable to other existing technologies such as induction motors. Different SyR and PM-SyR machines with different ratings and applications were designed, for comparison with induction motors having equal frame. An accurate comparison between Induction motors, SyR and PM-SyR machines is reported, with reference to the IE4 and IE5 efficiency specifications that could become mandatory in the next years.
Three studies are classified under the term ”Non-Conventional” machines:
Line-Start SyR motor: is a special SyR machine designed for constant speed applications, line supplied. The rotor flux barriers are filled with aluminum, to obtain a squirrel cage that resembles the one of an induction motor. The manufacturing costs are comparable to those of the induction motor, and the efficiency is higher. Two prototypes were realized and tested.
FSW-SyR: tooth-wound coils and fractional slot per pole combinations were investigated. They are of interest because they permit a simplification and higher degree of automatization of the manufacturing process. However, FSW-SyR machines are known for their high torque ripple, low specific torque and power factor. The number of slots per pole was optimized to maximize the torque density. Dealing with the torque ripple, a lumped parameters model was used together with optimization in SyRE. A design with minimized ripple was obtained, comparable to a distributed winding machine in this respect. This design was prototyped and tested.
Mild Overlapped SyR: this study shows a new winding configuration applied to SyR and PM-SyR machines. The proposed case is in the direction to find a hybrid solution between distributed winding and tooth winding motors, that permits to reduce costs and improve performances. One limitation of this solution is that only number of pole pairs equal to five or higher are feasible, and this reduces the applicability of the solution to classical industry applications, where one to three pole pairs are normally used.
32
Mandal, Abhijit. "Design and Implementation of Java Virtual Machine". Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/81.
Testo completoAbstract (sommario):
Interpretation of Java bytecode results in slow execution of program.First version of Java Virtual Machine(JVM) implementation was relied
on interpretation techniques. On the other hand performance can be improved by translating the Java bytecode into machine code by a Just-In-Time(JIT) compiler and this technique is being integrated into most JVM implementations.
Java is an automatic garbage collected language, freeing the programmer from the explicit memory management. Garbage collection "pause" time can
be reduced by using a generational garbage collection.
This thesis describes an implementation of a JVM. The specific contributions made in this thesis include: development of a Just-In-Time(JIT) compiler using DAG construction technique, a bytecode interpreter, a generational
garbage collector. Our implementation can execute Java bytecode either by an interpreter or the bytecode can be translated into machine code
using the JIT compiler and the translated code is directly executed by the processor. We have implemented the Java Native Interface (JNI) to enable using C and assembly language programs with Java.
33
Mandal, Abhijit. "Design and Implementation of Java Virtual Machine". Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/81.
Testo completoAbstract (sommario):
Interpretation of Java bytecode results in slow execution of program.First version of Java Virtual Machine(JVM) implementation was relied
on interpretation techniques. On the other hand performance can be improved by translating the Java bytecode into machine code by a Just-In-Time(JIT) compiler and this technique is being integrated into most JVM implementations.
Java is an automatic garbage collected language, freeing the programmer from the explicit memory management. Garbage collection "pause" time can
be reduced by using a generational garbage collection.
This thesis describes an implementation of a JVM. The specific contributions made in this thesis include: development of a Just-In-Time(JIT) compiler using DAG construction technique, a bytecode interpreter, a generational
garbage collector. Our implementation can execute Java bytecode either by an interpreter or the bytecode can be translated into machine code
using the JIT compiler and the translated code is directly executed by the processor. We have implemented the Java Native Interface (JNI) to enable using C and assembly language programs with Java.
34
Field, Matthew. "Machine vision system developments for industrial inspection applications". Thesis, University of Central Lancashire, 1997. http://clok.uclan.ac.uk/20334/.
Testo completoAbstract (sommario):
This thesis describes research in the area of automated industrial inspection using machine vision systems. It is anticipated that the algorithms described will contribute to the design of a machine vision system for the automatic surface inspection of cylindrical pellets. Firstly, the acquisition and segmentation of pellet tray images using area capture is described. Individual pellets are segmented from a pellet tray image by a novel system using the Radon transform coupled with data clustering. Subsequent to the segmentation, the linking of four pellet views depicting the entire circumferential area of the pellet is described along with a simple technique to compensate for intensity variations brought about by imaging the three-dimensional cylindrical surface of the pellet. The image processing techniques of filtering, edge detection, thresholding and morphology are used in the segmentation of grey level pellet defect images. The grey level pellet images are low-pass filtered and binary images formed using edge detection with thresholding. Binary morphology operators are then used in conjunction with a termination condition based on the number of objects in the image to ensure homogenous defect representations. The problem of overlapping defects is addressed, resulting in a second algorithm using the Radon transform coupled with data clustering. Prior to classification salient features are extracted from a set of synthetic binary defect images to form feature vectors. The novel idea of image object classification using 100% fuzzy inference is described, and results are shown to be superior to results obtained by feature space classifiers. The sub-classification of crack defects is carried out using a heuristic classifier, and the parameterisation of pellet defects is described.
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.
Testo completoAbstract (sommario):
Thesis (Ph. D.)--University of Missouri-Columbia, 2007.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.
36
Scheponick, Marie. "Computerized machine knitting and felted-knits /". Online version of thesis, 1991. http://hdl.handle.net/1850/12183.
Testo completo
37
LIU, ZHI-JIAN, e 劉志堅. "Submicron positioning machine design". Thesis, 1990. http://ndltd.ncl.edu.tw/handle/23870620269490925943.
Testo completo
38
TSAI, CHIU-PING, e 蔡秋萍. "Garment Folding Machine Design". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7f7trh.
Testo completoAbstract (sommario):
碩士吳鳳科技大學
光機電暨材料研究所
107
The technology developed in this research is to complete the folding operation by the design of the automation mechanism to replace the current manual operation mode in order to achieve the request of automation operations. The clothes are transported by the conveyor belt and then folded by folding mechanism. The folded clothes are put into the bags for packaging, and then the bags are sealed to complete the production process in the garment factory. The main purpose of this research is to design the folding machine for the purpose of folding clothes. Such automation technology is very important for the stability of manufacturing. It is of great help to the improvement of research in current garment industry, and it can be greatly improved in value. Keywords—Automation, folding clothes, folding mechanism.
39
Ch, Jin-Xiang, e 池錦祥. "The Design of Knitting Machine". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/38905928955795285637.
Testo completoAbstract (sommario):
碩士建國科技大學
自動化工程系暨機電光系統研究所
101
Knitting machine design detection, is based on a weaving machine spindle pole placed on the plate characteristics, pending the completion of the spindle pole placement then observed weaving machine operation, each spindle pole pass of the blade gap presented regularity operation characteristics after the theoretical basis of the system in order to make this theory can be converted to a simple and convenient design detection mode, each spindle pole in static conditions given numbered in accordance with its operation spindle pole displacement characteristic number the upper right corner mark a as marked each spindle pole operation displacement where the Location. Knitting machine design detection, is based on a weaving machine spindle pole placed on the plate characteristics, pending the completion of the spindle pole placement then observed weaving machine operation, each spindle pole pass of the blade gap presented regularity operation characteristics after the theoretical basis of the system in order to make this theory can be converted to a simple and convenient design detection mode, each spindle pole in static conditions given numbered in accordance with its operation spindle pole displacement characteristic number the upper right corner mark a as marked each spindle pole operation displacement where the Location. This knitting machine on the actual location of the operation of each spindle pole, the design sketch into the knitting machine, you can clearly predict the design of the machine normal operation, instead of having the spindle pole collision the barrier's happening, and thus achieve the purpose knitting machine is designed to detect.
40
王驥. "Furniture Design with Machine Aesthetics". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/45414576313652464508.
Testo completo
41
Chan, Ya-An, e 詹雅安. "Design of Grouper Scaling Machine". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/90189177144443259262.
Testo completoAbstract (sommario):
碩士國立臺灣大學
生物產業機電工程學研究所
104
According to the Food and Agriculture Organization of the United Nations (FAO), the global outputs of farming grouper in 2013 reached 137 thousand ton valued at 19.9 billion NTD, and grow annually. The number shows that grouper are highly remunerative and significant farm fishes in the world. Taiwan, which was called the kingdom of grouper farming, although having greater grouper farming technique and better farming seasons, the improvement of grouper processing and marketing can be developed to having more advantages to compete other countries. Currently, the frozen grouper product is one of the progress in grouper farming industry. The product provided lower transportation cost and higher food safety. Also, the higher storability improved the problem that the provided grouper varying quality and price with season variation. Therefore, the study developed a method for grouper scaling during the procedure of frozen grouper products manufacture. The grouper conveyed form top to bottom and was descaled by impacted four water jets, two for each side. An adjustable prototype machine was designed to prove feasibility of the method. Nozzles position setting from manufactured machine was adjustable. The scaling rate was higher than 75%. By proper designed of both grouper transmission device and grouper scaling equipment, the designed machine is low cost, high efficiency and simple operation to do the grouper scaling completely. Thereby, the manufacturing procedure of frozen grouper product can be improved. Also, the grouper farming industry in Taiwan can have a greater breakthrough.
42
Jiang, Ding-Rong, e 江定榮. "Asynchronous Multimedia Presentation Design Machine". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/32275197319677257718.
Testo completoAbstract (sommario):
碩士淡江大學
資訊工程學系
86
In the development of multimedia, multimedia presentation system is an important part. It is an important issue that how to play multimedia resources smoothly in the system. In the context, I will introduce a system --- Multimedia Abstract Machine and describe one of important functions --- Multimedia Presentation Design Machine. I construct the algorithm of system kernel based on the Timed Petri Net. In the system, it provides the function of dynamical process except for playing multimedia objects by timschedule. This mechanism can enhance the flexibility of system. The system will provide a friendly user interface with many tools and multimedia presentation designer can design his/her presentation schedule in a better environment. Users can analysis and organize their presentation example using the system. By the chart of multimedia presentation, a designer can understand the executing performance of presentation in the system and modify any multimedia object in the schedule. The one of important features is including the concepts of software engineering. In designing level, the system organization is a structural module with independent levels. For the reason, the system development has a long extension. In system maintenance, the system can resolve various data type of multimedia resource using the method of software metrics and testing of software engineering. The approach can enhance the system structure and system performance. The system operation is based on the timed Petri net. Consequently, it provides a large area in the low level. About multimedia resource conflict, asynchronous or synchronous control and user interrupt, the system has feasible research field in the theory or implement. In my paper, they will be introduced step by step about basic concepts, system algorithm and system interface.
43
LIN, MING-HUI, e 林茗慧. "Automatic Clothes Packaging Machine Design". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/t7u5b7.
Testo completoAbstract (sommario):
碩士吳鳳科技大學
光機電暨材料研究所
107
The technology developed in this research is to replace the current manual operation after folding garment by the automation mechanism design. In needs of the current automation operation, the automatic packaging mechanism is used for the request. After the clothes are fold by the automatic folding machine, the clothes are transmitted into bags for packaging. Then the bags are sealed to complete the process in the garment factory. In this study, the packaging mechanism is designed for folding garment. Such consistent automated packaging technology has greatly contributed to the current output of the garment industry.
44
Nahak, Nibedit. "Design of Fish Descaling Machine". Thesis, 2015. http://ethesis.nitrkl.ac.in/7407/1/2015_Design_Nahak.pdf.
Testo completoAbstract (sommario):
In the past, various products have been found to descale the fish but till not much importance has been given to the idea of developing an efficient product with reasonable cost for a targeted section of customers in the society. After the need analysis and identification of the tobe-developed product, the search of the idea leads to an innovative concept of scaling fishes succeeding the need of it. Now there are various machines available in the market to scale but a system that ascertaining both cost and quality has not been produced on a mass scale yet. In this report, we first study the existing market and level of usage on the machine by various category of customers. Then the various mechanisms and cost analysis depending on the nature of the job performed by the accessories are discussed which is followed by the project design and analysis. Some designs that could provide a solution for the problem are found. Out of this, the best design is found out considering factors like the effort required, cost, efficiency, time and quality over performance. The various possible subsystems of the device are listed. The morphological analysis is then done. The most efficient and cost effective combination of subsystems is selected. This is the solution for the problem. The specification and size of the parts of the device are also given.
45
Zheng, Lei. "Design and Application of Wireless Machine-to-Machine (M2M) Networks". Thesis, 2014. http://hdl.handle.net/1828/5822.
Testo completoAbstract (sommario):
In the past decades, wireless Machine-to-Machine (M2M) networks have been developed in various industrial and public service areas and envisioned to improve our daily life in next decades, e.g., energy, manufacturing, transportation, healthcare, and safety. With the advantage of low cost, flexible deployment, and wide coverage as compared to wired communications, wireless communications play an essential role in providing information exchange among the distributed devices in wireless M2M networks. However, an intrinsic problem with wireless communications is that the limited radio spectrum resources may result in unsatisfactory performance in the M2M networks. With the number of M2M devices projected to reach 20 to 50 billion by 2020, there is a critical need to solve the problems related to the design and applications in the wireless M2M networks.
In this dissertation work, we study the wireless M2M networks design from three closely related aspects, the wireless M2M communication reliability, efficiency, and Demand Response (DR) control in smart grid, an important M2M application taking the advantage of reliable and efficient wireless communications. First, for the communication reliability issue, multiple factors that affect communication reliability are considered, including the shadowing and fading characteristics of wireless channels, and random network topology. A general framework has been proposed to evaluate the reliability for data exchange in both infrastructure-based single-hop networks and multi-hop mesh networks. Second, for the communication efficiency issue, we study two challenging scenarios in wireless M2M networks: one is a network with a large number of end devices, and the other is a network with long, heterogeneous, and/or varying propagation delays. Media Access Control (MAC) protocols are designed and performance analysis are conducted for both scenarios by considering their unique features. Finally, we study the DR control in smart grid. Using Lyapunov optimization as a tool, we design a novel demand response control strategy considering consumer’s comfort requirements and fluctuations in both the renewable energy supply and customers’ load demands. By considering those unique features of M2M networks in data collection and distribution, the analysis, design and optimize techniques proposed in this dissertation can enable the deployment of wireless M2M networks with a large number of end devices and be essential for future proliferation of wireless M2M networks.Graduate
0544
flintlei@gmail.com
46
Bailey, Brent Andrew. "Evolving the machine /". 2006. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=442409&T=F.
Testo completo
47
DeRosa, Daniel John. "From megamachine to living machine : an evolution of machines as design models". 2002. http://purl.galileo.usg.edu/uga%5Fetd/derosa%5Fdaniel%5Fj%5F200208%5Fmla.
Testo completo
48
Hsu, Chan-cheng, e 徐展成. "Research on smart machine design- Locking screw machine as an example". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/2e4nu8.
Testo completoAbstract (sommario):
碩士國立臺北科技大學
管理學院EMBA華南專班
106
Driven by current Industry 4.0, Smart Factory and smart design concept on equipments turn into future development directions. In the whole electronics industry, smart auto screw driving machine design and development fulfills the demand of Smart Factory on screw driving process. During the research process, this research analyzes other applicable industries trying to explore all the possibilities on this particular smart equipment. Furthermore, during the total equipment smart solution design process, we phase in “Smart” concept while analyze to fulfill the demand of smart auto screw driving machine. In addition, on the information level, it has to be capable of M2M (machine to machine), M2H (machine to human) Expert System and M2S (machine to system) to complete the smart manufacturing integration and then take a next step to Smart Factory.
49
Yiying-Chen e 陳奕穎. "Intelligent Design in Automatic Drilling Machine". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33936946933943019730.
Testo completoAbstract (sommario):
碩士建國科技大學
自動化工程系暨機電光系統研究所
98
ABSTRAT The current traditional drilling machines are usually unable to identify the different kind of material hardness during the drilling action. Therefore, the drills are easily abraded or damaged which may cause the increase of cost. Due to these problems and disadvantages of the drills, this paper designs an intelligent automatic drilling machine to improve the disadvantages of traditional fixed speed drilling machines. The purpose of this design is to avoid the collision of hard material and cause the drill collapse or breaking. On the contrary, when the material’s hardness is lower, such as plastic materials, it can become a high-speed execution. After the penetrating, it will retreat from the subject in low-speed rotation. While using high-speed in drilling, faster speed can avoid the high temperature of drilling the materials. The high temperature will lead to the problem of deformation of aperture or low accuracy. The system integrates a touch screen and a PLC controller to automatically select and judge the materials for the drilling machine. The experiment proves the design can actually improve the drilling efficiency and extend the usage of drills. Keywords: Drill pressd, rilling machine, touch screen, PLC controller
50
Chang, Chien-Fei, e 張建斐. "STUDY OF MACHINE TOOL DESIGN PROCESS". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/92909792388581565667.
Testo completoAbstract (sommario):
碩士朝陽大學
工業工程與管理研究所
86
The Purpose of this study is to develop a hierachical framework for modeling machine tool design process. Because the design is a highly knowledge-based work, featured by its un-repetitiveness and that of no standardization, building a framework or modeling a design process is one of herculean tasks. The case taken here focuses on the complicated process of designing a machining center. The studying scope is limited at preliminary design stage. This is to develop a system model for machine tool design process, which can be provided to the industry as a planning reference model for their design process. The core is how to build up a model, a framework of hierarchy, drill down the vast design process by a top-down approach, disaggregate the framework by levels-integration, function and mechanism, sub-system, component and parts, features and specification setting-five design levels all told. The framework provide IDEF0 model users not only with the principles and definition of the hierarchy but also a logic for the decomposition of a design process. This writing is to illuminate what is the hierarchy of machine tool design process, how to integrate IDEF0 model with design activities and design factors, and how to build a system model for design process. The content of the study has been tried out and verified at KAFO Machinery Corporation, in the project of vertical machine center. Keywords：Precision machine design, IDEF0 models, system modeling.