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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
271

Konstrukce univerzálního zařízení na dělení pneumatik . / Design of Universal Equipment for Tire Cutting

Kohoutek, Petr January 2009 (has links)
The main content of of this thesis is a construction design and analysis of a machine for cutting tires. The resulting solution emerges from the design options and the option that meets the best selection criteria is chosen. Then the thesis stops for a while at the choice of cutting technology and tries to exemine its suitability for cutting tires. In its other part there is an attempt to clarify the relevant parts of the machine, where the benefits of three-dimensional views is used. Basic design and check calculations are done in the selected machine parts.
272

Návrh automatizovaného měřicího pracoviště s průmyslovým robotem / Design of measurement robotized workcell

Tvardek, Michal January 2013 (has links)
This master's thesis focuses on the use of the Renishaw's Equator gauging system in cooperation with the industrial robot. The target is to design the robotized workcell which contains these two products. Robot acts as a manipulator for inserting and sorting out the workpieces into the "good" and "bad" pallets according to measured results from the Equator. Equator uses a parallel kinematics and probing system which is normally used on coordinate measuring machines. Therefore there is the introduction to the parallel and serial kinematic structures, to the problems of the coordinate measuring machines in the first part of this thesis. It was made a separation of the probing systems into a few basic categories, description of the typical representatives of these categories and of the other important accessories of the coordinate measuring machines, too. The second part of the thesis contains a description of the Equator gauging system, the industrial robot which I used and their accessories. In this part is mentioned a few examples of measurement automation in industry practice, too. The third part devotes to the design of the robotized workcell and contains all the important requirements for the realization.
273

Řízení jednoúčelového obráběcího stroje / Control of special purpose machine tool

Plocek, Jaroslav January 2015 (has links)
The master thesis treats the design of control system of special purpose machine tool. The first part analyzes and compares two possible variants of control system which use either a CNC control system Sinumerik or motion control system Simotion. Only the variant with the Simotion control system is subsequently examined in detail: its hardware configuration, the selection of components and partly also the software solution. The thesis further deals with the safety of the realized control system and of the whole machine. There are described general safety requirements of machinery based on harmonized European standards and their specific application in the design of safety functions and the safety circuits of solved machine tool.
274

Analýza vlivu mechanického momentu asynchronního stroje na sycení magnetického obvodu / Mechanical Torque Analysis of Induction Machine Based on Magnetic Circuit Saturation

Skalka, Miroslav January 2011 (has links)
e main goal of this thesis is mechanical torque analysis of induction machine based on magnetic circuit saturation, oversaturated areas classification and the possibility of oversaturated areas reduction of their influence on machine properties. Whole problem is solved by finite element method in ANSYS program. Work is divided into the description and creating of electromagnetic model, a method of the induction machine equivalent circuit parameters determination, the electromagnetic field calculation by finite element method, experimental measurement using LabVIEW program with measurement accessories (PCIe card National Instruments), data processing program in DIAdem, results analysis of calculations in terms of magnetic circuit saturation, the influence of magnetic circuit material based on electromagnetic field distribution and the magnetic flux density along the air gap including spectral analysis using MATLAB and the electromagnetic torque and its parasitic torque components calculation.
275

Koncepty strojového učení pro kategorizaci objektů v obrazu / Machine Learning Concepts for Categorization of Objects in Images

Hubený, Marek January 2017 (has links)
This work is focused on objects and scenes recognition using machine learning and computer vision tools. Before the solution of this problem has been studied basic phases of the machine learning concept and statistical models with accent on their division into discriminative and generative method. Further, the Bag-of-words method and its modification have been investigated and described. In the practical part of this work, the implementation of the Bag-of-words method with the SVM classifier was created in the Matlab environment and the model was tested on various sets of publicly available images.
276

Stavebně technologický projekt podnikatelského inkubátoru / Constructive technological project of a business incubator

Sviták, Marek January 2018 (has links)
The content of the diploma thesis is the processing of a constructive technological project of a business incubator. The objective of this constructive technological project is to approach the construction process in the framework of the study of the implementation of the main technological stages, which closely follows the project of the site construction equipment with suitable layout of its construction, as well as the design of suitable machinery mechanisms for realization of the main building. Part of the project is also to determine the timeliness of work, financial and material management, and technological regulations for implement selected activities, taking into account the quality control and planning of their implementation. The whole construction process is completed in the final part of the diploma thesis on the solution of the occupational health and safety issues.
277

Problematika šablonového tisku pájecí pasty pro součástky s malou roztečí vývodů / Problems in Solder Paste Stencil Printing for Fine Pitch Components

Šimeček, Ondřej January 2011 (has links)
Despote the indisputable advantages of fine-pitch components, is need to calculate with a few trouble during production, especially increased requirements for accuracy of mounting and solder printing. In this work I’m concerned with problems of solder printing for these components and evaluation using SPC. For the evaluation I used 3D paste inspection based on laser scanning of the surface. The output of this work is to describe the principles of solder printing and elaborating of GR&R, SPC analysis and histograms of solder printing for some outputs. I focused in my master thesis on motive design change of problematic components and economic evaluation of the adjustments.
278

Střídač pro trojfázový motor / Iverter for three-phase motor

Mikuška, Martin January 2014 (has links)
This master’s thesis goes into design of particular circuits for three phase inverter. Inverter’s control is ensured by digital signal controller MC56F8013 with his program. Principle of control is suggested for individual motors. Inverter design considerate universal use and capability for any three phase motor. Particular blocks are compatible each other.
279

Rekonstrukce areálu učiliště Dubňany. Stavebně technologická příprava stavby. / 1. Reconstruction of the vocational school Dubňany. Construction Technology Preparation

Dohnálek, Marek January 2015 (has links)
The subject of this technological preparation of construction is to find out scope of work needed for reconstruction of former miners school in Dubňany.In Czech Republic exits plenty of these abandoned places and this master thesis should serve as an example of reconstruction of some theirs parts.Within this project I would like to valorize the experience gained from excursion to foreign countries, where the passive and low-energetic buildings are common.Missing project documentation of some part of this facility was replaced by 3D modelling based on my own laser measurement.The main object SO 01 has been already rebuilt into passive apartment building but without building-technological study and proper project documentation.Due to missing foundations and confidential internal documentation of the construction company is impossible to compare the real material, human and financial resources with those mentioned within this thesis. The master thesis contains technical report for the building-technological project, coordination of the transport routes, chronological and financial plan, realisation of the main technological steps, equipment of the construction project , draft of machinery, time schedule of the main project, plan of getting the needful resources, technological regulations, control and probationary plans, disposal of asbestos reports, owning contract, two roof decks comparison from the point of view of thermal technology and specialization from the building field.
280

Simulace válečkování pomocí explicitní MKP / Simulation of rolling operation using explicit FEM

Bezrouková, Martina January 2012 (has links)
The purpose of this work is to introduce explicit finite element method (FEM) and to familiarize with commercial software tools witch are capable to perform simulations. The technological conditions and the scope of application of roller burnishing are described in subsequent part. The simulation model of roller burnishing was created. Software ANSYS LS-DYNA was used to make computations. The results of simulation and technical and economical benefits of roller burnishing are presented in the conclusion.

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