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Frequency Synthesizers
Lapčík, Josef ; Špaček, Jiří (referee) ; Dřínovský, Jiří (advisor)
This diploma thesis concerns with analysis and dividing of frequency synthesizers and design of DDS, PLL synthesizers. Base types of frequency synthesizers are described including differences between methods of their operation. Base circuits of both – DDS and PLL synthesizers and other important circuits are described in details at design part of this thesis. Design of DDS and PLL synthesizer is described in particular sections. Both synthesizers are directly realized and stand-alone control applications are created. PLL synthesizer is also ready to control thru Agilent VEE program environment. Particular example application is designed in Agilent VEE. This application is used as basis of attached lab project.
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STAINLESS PART SHEET METAL FORMING
Rozmahel, Vladimír ; Podaný, Kamil (referee) ; Špaček, Jindřich (advisor)
The project elaborated in frame of Bachelor’s studies branch B2307. The project is submitting design of technology production of the flanged workpiece made of stainless steel 17 240. Based on results of initial study of the drawing topic, proposed solution was based on Guerin method split to three stages. The punch is replaced by rubber pad of rougness equal to 80ShA. The die is made of instrumental steel CSN 19 314.
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Naprocházku.cz - Web Service for Neighbour Walks
Špaček, Jiří ; Herout, Adam (referee) ; Szőke, Igor (advisor)
Nowadays the sharing of the experiences by the internet is very popular and that was the reason for establishment of service that aims to facilitate visitors to share their favorite walks. This work describes the design and implementation of application that will be able to offer this. As a major element of the display is used the Google Maps. The implementation is an own open application interface to communicate with mobile applications. To view tips for the walks is used an actual geographic location of the visitor. The work deals with the monitoring behavior of visitors working with this applivation as well. It is achieved interesting reresults. In the future there is a plan to expansion the application to keep the existing users and gaining new.
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Proposal for the production of variants of flat sheet metal parts with holes
Chaloupková, Lucie ; Peterková, Eva (referee) ; Špaček, Jindřich (advisor)
The final work elaborated in the scope of bachelor studies of the branch B2307-00 submitted variants of production for flat sheet metal parts with holes. In work there are two variants of production of one particular part namely: Production on sequence shearing tool and production by means of plasma CNC machine. Particular part is designed for quantity 120 000 pieces per year. Shearing machine S250 with shearing force 2500 kN is selected (manufacturer Smeral a.s.Brno). In the work there are implied necessary calculations for both variants including economical evaluation and criteria for practically implementation.
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Software Support of Project Planning
Forman, Vladislav ; Špaček, Jaroslav (referee) ; Waldhans, Miloš (advisor)
The topic of this thesis is software support for project planning. The theoretical part explains the principle of project management processes. The output of the practical part is the elaboration of the software design of the building project on a specific order, where the specific order and the processing procedure using the proposed software program is described.
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Technology of radial bearing steel cages production
Jabůrek, Petr ; Špaček, Jindřich (referee) ; Rumíšek, Pavel (advisor)
The project conceived within engineer’s studies of branch 2303T002 is subbmitting a proposal for radial bearing cage produce technology. It is also subbmitting a design solution to functional parts for blanking the “windows” and coining the “locks”. The cage will be made from sheet steel 11 300.29. This cage should replace the current one machined from the brass Ms 58 Al. According to the literary research and development experiences of the company ZKL Brno, a.s., two pairs of tools were designed. First one for blanking the “windows” and second one for coining the “locks”. Blanking punch, blanking die and coining punch will be made from the steel 19436, coining die will be made from the steel 19312. Heat-treating process will be accomplished according to the enclosed drawings. Both pairs of tools will be mounted in the press LENR 63 AU (manufactured by the company ŠMERAL Trnava), with nominal force 630 kN.
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L-band receiver front-end
Kolář, Jan ; Špaček, Jiří (referee) ; Kasal, Miroslav (advisor)
This Master's Thesis deals with a design of L-band receiver front-end. In the concrete the receiver is designed for receiving signals of frequency band 1,3 GHz. All particular blocks from low noise amplifier to intermediate frequency amplifier and frequency doubler in LO input are described, designed and simulated in program Ansoft. The part of this Master's Thesis is aimed to construct a working front-end receiver and to measure its basic parameters.
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Stabilized operation of a 400 kV power line
Girga, Eduard ; Špaček, Jaroslav (referee) ; Blažek, Vladimír (advisor)
Electrical wiring 400 kV is the most used transfer wiring in the Czech Republic with length over three thousand kilometers. It is frequently used for running out significant output from the big power plants and for its significance in electrical engineering. Theoretical part of this thesis deals with the cross-section of mainly used methods for high and extra high stable wiring voltage solution. These methods can be generally dividend into precise and rough. Both of these methods will be analyzed in next chapters. Exact solution comes out from the presumption of equally spaced parameters. The rough solution uses substitution of double gates wiring, this method is accurate enough and accelerates the calculation. Former mentioned reasons explains it’s often use in technical practice. The electric line is substituted by T-cell, II-cell or Steinmetz cell according to length and required precision. Special method of rough solution is the broad method which enables to solve randomly knotted network by using II-cell to replace electric wiring between single knots. This method is mentioned in thesis for completeness; the network solved by me is not knotted. Part of the theoretical thesis is the analysis of specific transfer cases. In computing part will be mentioned not only the computation of stable wiring state with precise an rough method - with all former mentioned cell but the computation of specific transfer cases as well. In the end will be concluded all the counts from computing part and from precision view evaluated used methods of the stable wiring solution.
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