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Model of the oscillating system with kinematic excitation
Vrzal, Vojtěch ; Radil, Filip (referee) ; Formánek, Martin (advisor)
This bachelor thesis deals with the design and implementation of an oscillation model of a system with kinematic excitation. The aim of the thesis was to create a prototype that would simulate the behaviour of the dynamic system as closely as possible and would allow its behaviour to be analysed and subsequently used as a teaching model. In the research part, the system equations and the state-space model are derived. Subsequently, the structure including actuator and sensors is designed and fabricated. Finally, the system parameters for the mathematical model are estimated and then compared with the measured data.
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Multi-body model of rolling-element bearing suitable for the fault simulations
Baláž, František ; Dlugoš, Jozef (referee) ; Rekem, Jakub (advisor)
This thesis focuses on the analysis and diagnostics of rolling bearings, aiming to develop parametric and multi-body models that allow for effective examination of various types of defects. These models can simulate different geometric imperfections and their impact on the dynamic properties of bearings. The model uses Hertz's theory of elastic contact to calculate contact forces and deformations. The parametric model is created using Inventor software, and the multi-body model is developed using MSC ADAMS. The goal of this work is to create models that produce synthetic data comparable to experimental data, to determine if they can effectively replace current software. The results show that precise modeling and simulations can significantly contribute to predictive maintenance and extend the lifespan of rolling bearings.
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Silicone damper of a six-cylinder in-line diesel engine
Drozdek, Lukáš ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis "Silicone damper of a six-cylinder in-line diesel engine " is focused on the proposal of alternative using of silicone damper for the a six-cylinder in-line diesel engine, which is made for tractors and other industrial aplications. The aim of this thesis is to count the oscilation of crankshaft by the help of appropriate dynamic model, then to propose such a basic parameters of silicone damper, which absorbes torsion blip crankshaft to acceptable value. The next part of my thesis is proposal of the constructive implementation of fixation the silicone damper on the free part of crankshaft. The last part of my thesis is comparing and evaluating the oscilation of crankshaft without a dumper and with a new propsal of the silicone damper.
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Dynamic simulation of DC motor using FEM
Gottwald, Michal ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
My diploma thesis deals with a specific dynamic model of DC motor with the parameters obtained from the calculation and from the program using the finite element method. It shows how much accurate results can be achieved in the model, if you use only the values which can be measured, recorded and calculated on the engine. This thesis contens three parts. First part describes the structure and function of DC motor and the basic principle and the use of FEM. Next is calculation analytical and numerical parameters. The search parameters include torque, resistance and inductance of armature winding, resistance and inductance of excitation windings. The last part is dedicated to creating a dynamic model. Results from the dynamic model and measured values are compared in the conclusion of my thesis.
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Nonlinear models of DC machines
Král, Michal ; Mišinger, Lukáš (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with modeling and simulation of DC motors. Four models of DC motors were created, according to four types of excitation ( derivative, serial, compound and separated). These models were designed in simulation program MATLAB & Simulink. Models were adjusted in order to respect magnetic non-linearity. Parameters for simulations were measured on real DC machine and the simulations were executed. This theses focuses on examination of temporary effects and comparing with real measured developments.
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Control of antagonistic pair of Pneumatic Muscles
Klapil, Ondřej ; Burian, František (referee) ; Kopečný, Lukáš (advisor)
This thesis deals with controls of pneumatic muscles in antagonistic involvement. Mathematical-physical model of McKibben's pneumatic muscle is deduced in this work. A computer model is created using Matlab and the method of controls of the muscle is designed. The next section describes a real system with pneumatic muscles, its practical realization and design of controllers for this system. The last part is a comparison of the created mathematical-physical model and the real system with regard to the possibility of using the model for designing controllers for real systems.
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Design of semiactive suspension for mountain terrain bike
Mráz, Kryštof ; Kubík, Michal (referee) ; Strecker, Zbyněk (advisor)
This Bachelor Thesis is focused to design semiactive suspension of mountain bike using MR damper. In research part of thesis is summarised knowledge about passive and semiactive suspension of mountain bikes and about MR dampers. Behaviour of suspended front fork was simulated using virtual dynamic model which was created in graphic environment MATLAB Simulink. Semiactive algorithms Skyhook and modified Groundhook and for comparison also passive settings are simulated. According to results of these simulations is designed semiactive suspension with MR damper which has effect to stabilising contact force of front wheel and therefore increases safety of rider.
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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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