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Passive shunt filtration and compensation
Urant, Tomáš ; Novotný, Jan (referee) ; Drápela, Jiří (advisor)
The aim of this work is to acquaint the reader with the theoretical and practical design filtration-compensation device. The theoretical part describes the problems of reactive power compensation and harmonic filtering components. There are described various methods and implementation of compensation and filtration-compensation devices. In the practical part is the theoretical basis used for the realization of a laboratory model of filtration-compensation device for precisely specified load with precisely specified requirements. In laboratory model can be seen meaning of filtering harmonics by using of simple hand switching individual filters.
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Dispersion effects in high-speed optical networks
Filip, Tomáš ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
This bachelor’s thesis is focusing on optical transmission principal, its transfer mediums and furthermore also with focusing on its advantages and disadvantages. First half of this thesis focuses on adverse influences, which affect signal transmission in optical networks, on dispersion influences, especially on Polarization Mode Dispersion (PMD). Second half of this thesis deals with measuring of properties of optical fibers, largely chromatic and polarization mode dispersion, used methods and its principals. Furthermore, there are mentioned current compensation possibilities. The seventh chapter deals with optical route simulation in OptiSystem and testing chosen compensation methods for bit rate 40Gb/s. In the last chapter there are elaborated results of real optical route measurements for Masaryk University.
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Impact of conventional compensation to the volumetric accuracy of the machine tool
Žák, Zdeněk ; Vetiška, Jan (referee) ; Holub, Michal (advisor)
This thesis solves the impact of conventional compensation to the volumetric accuracy of the CNC machine. It is therefore a practical research work, where are in the theoretical introduction mentioned requirements for machine tools, the types of errors that can occur on three-axis kinematics, compensation for the control system Siemens Sinumerik 840D sl and devices by means of which are these compensation under the work formed and subsequently verified. In this work can be seen the measured values and graphs from each measurements, a detailed analysis of the results and drawing conclusions from these results.
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Proposal of Changes of Motivational System in a Selected Company.
Radičová, Kateřina ; Čépe, Vladimír (referee) ; Konečná, Zdeňka (advisor)
In this thesis, the author deals with the motivation of employees in a selected company. Attention is paid to the analysis of the current motivational system, evaluation and remuneration system. The aim of this thesis is to gain theoretical knowledge and analysis of the current company status quo. Based on the analysis an effective motivational system will be proposed in order to achieve higher employee satisfaction and thus obtain better working results and an increased business performance.
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Thermoelectric device for measuring temperature
Melničuk, Petr ; Kandus, Bohumil (referee) ; Podaný, Kamil (advisor)
This thesis presents the application of thermocouples for measuring temperature. Thermocouples are a kind of contact thermometers, thus requiring direct contact with measured substance. Their advantages include great flexibility due to wide choice of material combinations, which makes it possible to achieve various operating temperature ranges, anywhere from -200 to 1800 . Improper choice of thermocouple may result in added systematic error or even render it unusable. Based on literary research, individual configurations, methods of measuring liquids, gases, and solids and their practical applications were presented. Lastly, an experiment was conducted, where three different type 'K' thermocouples were compared and deviations between their measurements were assessed.
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Proposal of the Motivation System in Company Clia, s.r.o.
Rauschová, Lenka ; Urban, Emil (referee) ; Novák, Petr (advisor)
The main aim of my bachelor thesis is to suggest a suitable motivational system for the Clia, s.r.o. company. In the theoretical part of the thesis, the basic koncept of motivation is explained. Next part of the thesis introduces an analytic survey, based on which the possible imperfections of the company might be shown. In the conclusing part, the possible measures for improvement of the company´s motivational system are proposed. These measures should lead to an increased motivation and productivity.
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Generating of the fault record for protection and fault indicator testing
Bažata, Petr ; Jinderle, Pavel (referee) ; Topolánek, David (advisor)
The thesis is focused on a presentation of a model creating which is followed by the simulation of running real network with using the compensatory elements to minimize the incurred failures. This thesis is divided into two thematic parts – the first theoretical one deals with the basis structuring of short-circuit faults and more detailed study of ineffective ground connection. Particularly this part attends to the problematic of a network description with extinguishing suppression. Using the compensation minimizes the impact of the failure state. A short-term fixing of a resistor improves the function of the ground-fault protection and helps to detect the outgoing section damaged by the defect. Furthermore the thesis indicates simulation programs, compares them and chooses the most suitable one for the next practical part. This is focused on a simulation of a real network run, together with elements for an effective defect-reduction or easier detection of ground connection. As a simulation of a ground short-circuit is the model in the end of the thesis modified on a network with an effective grounded bundle. Testing of the model correctness and creating a record of a model using the real ground protection settings is also one part of this thesis.
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Testing technology on-the-fly instrument LaserTRACER
Vala, Michal ; Vetiška, Jan (referee) ; Holub, Michal (advisor)
This diploma thesis describes realization and testing on-the-fly measurement using tracking interferometer. This measurement enables to achieve higher amount of measured points and decrease time of machine tool calibration. Calibration and verification values of machine parameters, as well as time of measurement and other details of this method are compared with results of conventional method called trigger. To evaluate the quality of volumetric compensation created from calibration values, we use verification measurement of circular interpolation.
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Drive Vertical Saddle of Machining Centre by Linear Motor
Zapletal, Radek ; Andrýsek, Radim (referee) ; Foller, Bronislav (advisor)
The diploma dissertation deals with the mechanism of vertical movement of a saddle of high-speed machining centre which is made by the Trimill company. The movement of vertical alloy saddle is solved by ball screw. The solution could be improved by replacing the ball screw by linear motor. This will dramatically improve the dynamics of the movement of the vertical saddle. In addition, if the weight is compensated by pneumatic relief and the construction is welded, the dynamics will further improve.
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Motivation of Employees in Selected Company
Řádová, Renáta ; Tunkl, David (referee) ; Novák, Petr (advisor)
The master thesis is focused on the motivation of employees in the chosen company. The current motivation system is analyzed based on questionnaire research and dialogues with director and main project engineer. Identified weaknesses of the current motivation system are analyzed and steps for improving the motivation system and employees satisfaction in the company are recommended.
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