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Computational analysis of column for horizontal boring centre
Fargač, Michal ; Vosynek, Petr (referee) ; Hadaš, Zdeněk (advisor)
The theoretical study of this thesis deals with different approaches that can be used to optimize the topology of various structures. Main attributes and principles which they are based on of individual methods are discussed. The first point of the practical part is to design the model for computational analysis of stand and other machining centre parts based on real machine TOS FU. Afterwards, the model is analyzed to determine the dynamic characteristic of the machine. Subsequently, several changes of the stand design are performed in order to improve the dynamic behavior. Eventually, new stand kernel is designed which aims to enhance these dynamic characteristic. This model is analyzed again and the results are compared with the original form of the machining centre.
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Design of vibration energy harvester with blade joint
Beňo, Martin ; Hadaš, Zdeněk (referee) ; Rubeš, Ondřej (advisor)
This bachelor thesis deals with the design of vibration generator with blade joint. Firstly, its main aim is to design a working vibration generator, and secondly is to entice the reader to continue on with reading. Such a vibration generator is a handy, inexpensive to manufacture, and especially very simple. The basic design element of the vibration generator is oscillating frame connected to the blade joint and is the carrier of the magnets. The electrical part of the generator consists of a magnetic circuit and coil on the static bracket. Oscillating frame with magnet creates a changing magnetic field and induces voltage in the coil. For the design of the construction was used the program Inventor. For the calculation of the magnetic circuit has been selected, the program FEMM controlled by MATLAB. For the calculation of the static and the dynamic analysis was chosen the program ANSYS.
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Virtual model of part of cutting machine in ADAMS
Juriga, Jakub ; Vetiška, Jan (referee) ; Hadaš, Zdeněk (advisor)
In theoretical part, this master´s thesis deals with vibrations in cutting machine and description of creation of self-excited vibrations theory. In practical part, there is problem of chatter in cutting machine solved with using simulation program Adams and computing program MATLAB. Gradually, Multi body system of cutting machine and model of cutting tool with features flexible body are analyzed. At the end all both models were used to create complex model of the cutting machine .
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Parametric Resonance of Dynamic Systems
Gajdůšková, Vendula ; Sosna, Petr (referee) ; Hadaš, Zdeněk (advisor)
The Bachelor’s Thesis deals with the parametric resonance which is investigated from the physical point of view by means of pendulum models, for which the equation of motion has been developed and subsequent modelling has been performed. The brief introduction is followed by a theoretical chapter which deals with the physical substance of parametric resonance and in which chosen physical models are described. The practical part of the thesis begins with the following chapter devoted to chosen examples of parametric resonance in practice, showing its benefits and harmful attributes on selected examples. The fourth and the main part of the thesis contains a simulation model of parametric resonance for two pliantly bound pendulums. The concluding part of the thesis consists of the summary of findings, model results and the list of used resources, abbreviations, figures and table.
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Virtual commissioning of production system
Bražina, Jakub ; Hadaš, Zdeněk (referee) ; Vetiška, Jan (advisor)
This diploma thesis deals with virtual commissioning of production system which is located in the laboratories of the Institute of Production Machines, Systems and Robotics at the BUT. The issue of virtual commissioning is described in the theoretical part of the thesis, followed by a description of each device located in this production system. The design of the 3D model, the design of the PLC control program and also the virtual commissioning itself are described in the practical part of the thesis. There is the creation of the robot‘s program described at the end of the thesis. Several Siemens software tools were used for virtual commissioning realization (TECNOMATIX Process Simulate, TIA Portal and PLCSIM Advanced 2.0).
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Piezoelectric vibration energy harvester
Klásek, Matyáš ; Rubeš, Ondřej (referee) ; Hadaš, Zdeněk (advisor)
The first goal of this bachelor’s thesis is to give an overview of piezoelectric materials and their utilization in energy harvesting applications. The second goal is to examine the effect of altering model parameters on generated power and natural frequency of the system using analytical model of a bimorph piezoelectric cantilever beam in MATLAB/Simulink.
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Design of HHO generator
Gašperec, Michal ; Hadaš, Zdeněk (referee) ; Krejsa, Jiří (advisor)
The subject of this Master Thesis is construction of hydrogen generator for automotive industry. The objective is to design system which is able to produce required amount of gas. The master thesis includes basic analysis of situation, mathematical equations of electrolytic process and procedure of mechanical design according required power of generator. The next part is design of power control system of hydrogen generator based on informations from automobile. The last part describes power supply of whole system with electric energy. The output of the Master Thesis is the whole design of hydrogen generator including sensor system and control system. The thesis also includes suggestions for next improvements and research.
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Green Machine Tools
Harapát, Jan ; Blecha, Petr (referee) ; Hadaš, Zdeněk (advisor)
This work is aimed at energy analysis and the search for the posibility of energy saving in present machine tools. There is mentioned the basic division of machine tools, it describes and analyzes the various methods of energy harvesting systems, and looking for the ways to improve the performance of machine tools.
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Generator for aircraft application HUMS
Zelda, Jan ; Huzlík, Rostislav (referee) ; Hadaš, Zdeněk (advisor)
Presented diploma thesis deals with development of the autonomous electric energy source for Health and Usage Monitoring Systems placed at the rear part of a helicopter. Firstly, the HUMS systems were described briefly and the research of available energy sources was made after that. After that, the magnetic properties of the materials were described with the special focus on the permanent magnets. The draft also includes the creation of model of the magnetic field using the final element method. Prototype was assembled and the other design solutions were evaluated. The evaluation of various designs passed in the use of SOMA optimization algorithms. The generator is followed by the draft of the electronics, which streamlines and regulates a voltage supplied by the generator. At the end of the thesis, the complete source prototype was assembled and tested with two different regulators
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