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Monitoring the effect of sample treatment in determining selected properties of biofuel
Štenclová, Kristýna ; Lachman, Jakub (referee) ; Lisá, Hana (advisor)
Diploma thesis is focused on the treatment of biofuel prior to combustion and effect of this treatment on the biofuel characteristics. The first part is a review of literature encompassing characteristics of fuel, preparation of samples, methods of analysis of individual characteristics and a presentation of various types of mills. The second part of thesis is experimental. It is an analysis of sample characteristics under various mill settings with regard to the temperature in the mill during grinding.
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Measurement of induction machines
Sporni, Peter ; Huzlík, Rostislav (referee) ; Janda, Marcel (advisor)
This work dissert about problematics of induction engines, which are the most used types of electrical drives used in present time. At the beginning we will explain their construction and its influence to the characteristics of the engine and possibilities of their regulation. In the next part we will describe some basic types of measurments implemented on these engines. To verify the theory which was described in this work we will discuss measurments realized on concrete types of engines. At the end we will calculate the main dimensions for one of the measured engine.
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Statistics of extremes
Fusek, Michal ; Neubauer, Jiří (referee) ; Michálek, Jaroslav (advisor)
The thesis deals with extreme value distributions. The theoretical part is devoted to the basics of extreme value theory and to the characterization of extreme value distributions. There is the limit theorem for distributions of the maximum formulated and characteristics of the extreme value distributions deduced. There are parameter estimates for Weibull, lognormal and exponential distributions inferred using method of maximum likelihood and method of moments. There is also the theory of censored samples described. The practical part is devoted to statistical analysis of rainfall.
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Electric microdrive with ultrasonic motor
Peřina, Martin ; Feiler, Zdeněk (referee) ; Koláčný, Josef (advisor)
This thesis is focused on selected kinds of piezoengines and their ability to control and follows the separate semester project. It mainly deals with technnology called Piezo LEGS and Piezowaves. Attention is paid to their structure, principles, parameters, characteristics, but also to field of their application. Next section is laboratory measurement of those species of piezoengines (demo-kits). At the end thesis contains three laboratory task, each type of engine is dedicated toone task. The contents of the work is focused on innovation activities in the learning process.
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C axis for vertical turning machine
Solař, Martin ; Novotný,, Lubomír (referee) ; Bradáč, František (advisor)
The subject of my thesis is a constructional proposal of C axis drive for vertically orientated machine. I have concerned the drive operates C axis of revolving slide. The thesis contains the cutting power study regarding the power being in effect during C axis machining, study of clearance adjustment in particular mechanisms, three constructive proposals of possible solutions, calculation of basic proposals’ demands as well as the best option selection which ideally fits to the all conditions requested by TOSHULIN, Inc.
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System for computer measurement of transistor characteristics
Krásl, Martin ; Šotner, Roman (referee) ; Brančík, Lubomír (advisor)
This thesis is focused on methods of measuring the characteristics of transistors in three basic connections. There is an example of the characteristic obtained from the simulator for each of the connections. Differential parameters are obtained from the resulting characteristics. These parameters describe a linearized equivalent circuit diagram of the transistor. To automate the process of obtaining characteristics, the next step of this work is the design and construction of the analyzer. The function of individual parts of the hardware is described in detail in the individual chapters. A computer application was created to control the analyzer. This application serves as the user interface. The conclusion of this thesis is a guide for a demonstration laboratory task.
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Simulation of electric machines
Klíma, Jiří ; Mišinger, Lukáš (referee) ; Mach, Martin (advisor)
This thesis deals with modeling and simulations of DC and AC machines. They were created by four mathematical models. Three models of DC motors with different type of excitation (compound, serial, derivative) and one model for asynchronous motor. All models were implemented in MATLAB & Simulink. After measuring and setting the basic parameters of the machines, simulations were running. Simulation results are then compared with measured waveforms.
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Determination of Characteristics Fan
Vymětalík, Zbyněk ; Škorpík, Jiří (referee) ; Kracík, Petr (advisor)
The topic of this bachelor thesis are fans. The first part deals with subsumption of these machines. The second chapter is devoted to their dividing. As the measured fan is radial, the third chapter presents the theory of designing this particular type. The last pages focus on finding the characteristic curves and the main dimensions. At the end, there are the sizes drafted in the way to correspond with the recommended values.
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