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Measurement of GNSS receiver parameters
Beneš, Jiří ; Lázna, Tomáš (referee) ; Jílek, Tomáš (advisor)
Goal of this thesis is to propose and realize a viable method to determine static a dynamic parameters of GNSS receivers. Thesis begins with research of GNSS, foremostly determining position and associated uncertainties of measurement. Following chapter contains research of GNSS receivers, data flow and methods of evaluating parameters of such measurements. Summary of obtained information is then used to schedule measurements, assemble experiment and create evaluating metrics. Main selected evaluating metric is weighted histogram of deviations with extended information. Aplication of proposed metrics onto measurements of GNSS receivers augments available information of GNSS receiver accuracy for whole range of values. This metrics also supplies additional statistical information about course of measurement.
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Improvement of the LCV 20 Stator Manufacture with The CNC Horizontal Boring Machine ŠKODA FCW 150.
Mejzešová, Monika ; Ženožička, Petr (referee) ; Píška, Miroslav (advisor)
This diploma thesis deals with a production process cast body of the stator the in the company Papcel, a.s., Litovel. The first part is focused on the description of the current production process. The production is realized with several manufacturing machines and hand machining also. The second part analyzes available changes of the current technology and describes alternative procedures and production facilities. The CNC machine-tool ŠKODA FCW 150 seems to be the most effective way of production, which could increase the labor productivity, cut the share of manual works, reduce a risk of a human error and to increase the final product quality and accuracy. The final part of the thesis evaluates the machine and preparation times for a single production, including assembly operations and financial impacts of the investments on the company costs.
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Analysis and quantification accuracy of the abrasive process
Brožina, Jiří ; Osička, Karel (referee) ; Prokop, Jaroslav (advisor)
The formulated study is focused on the analysis and quantification of the accuracy–parameters related to the abrasive process. The scope of the mentioned study deals with the identification of the abrasive process, technological influence and accuracy–parameters of abrading surfaces. In the final part of this study, there is a practical sample described with respect to the technological influence on the resulting accuracy–parameters of the abrasive process.
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Technological aspects of machining accuracy
Dlouhý, Michal ; Sedlák, Josef (referee) ; Prokop, Jaroslav (advisor)
This master‘s thesis is concerned by accuracy cutting of the process. The aim of this graduation theses is to describe metodology quantification of the parameters accuracy of cutting process and to check it. Firstly, there are the parameters accuracy of cutting process identified. Secondary, there are particular technological influences over accuracy of shaping process characterized. In the conclusion, there are characteristics accuracy of shaping process quantified and tested in practice.
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Comparison of dimensional accuracy of a selected part in 3D printing technology
Basler, Matěj ; Sedlák, Josef (referee) ; Dvořák, Jaromír (advisor)
Thesis is focused on comparison of influence from adjustable parameters on printing accuracy of selected 3D printers. Based on tests on 4 printed models was evaluated, how printers vary in accuracy based on their price and if there is a difference in commercially made printers and those made or modified at home. Tested influence on accuracy was from layer height, printing speed and nozzle size. These parameters were evaluated according to degree of their impact on printing accuracy and printing time.
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Calibration of angular encoder
Šindelář, Michal ; Klusáček, Stanislav (referee) ; Beneš, Petr (advisor)
This master’s thesis deals with calibration of incremental encoders. Introduces basic principles and terms in the field of rotary encoders and its calibration. The first part describes angular displacement sensors. Especially it focuses on optoelectrical incremental encoders. It also includes market research of very high-accuracy encoders. The second part contains description of precision calibration techniques with uncertainty to the thousandth of an arc-sec level. In the last part, the development of a calibration stage is presented and consequently the error map of an encoder is obtained.
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The current effectivness of bankruptcy prediction models in the conditions of Central and Eastern Europe
Honzíček, Štěpán ; Kuběnka,, Michal (referee) ; Karas, Michal (advisor)
Bachelor’s thesis describes issues of bankruptcy risk. It fleshes out key concepts related to bankrupt, introduces financial analysis like a instrument of evaluation enterprise financial situation and specifically deals with prediction bankruptcy models. Metodology of model construction is introduced and ROC curves as an efficiency testing method. Case study makes evaluation of accuracy for five chosen models in sector small and medium enterprises manufacturing industry of central and eastern Europe. Concluding part narrates possibility modification of models for accuracy increase.
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Comparison of traditional aeronautical precise approach navigation systems efficiencies with that of the LADGPS
Válek, David ; Sklenář, Filip (referee) ; Vosecký, Slavomír (advisor)
This work deals with the possibilities of using technologies and means of satellite navigation in civil air transport, focusing on the precise instrument approach of transport aircraft. The work describes traditional systems for guiding aircraft in the final phase of flight, their characteristics, principles of operation, advantages and disadvantages. Similarly, satellite navigation technology and its subsystems are described, which contribute to improving the accuracy and safety of these guidance devices. By analysing the characteristics and efficiency of all devices, a conclusion has been reached that the guidance technology could take hold in the future.
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