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Measurement and analysis of dynamic properties of rotating machine parts
Gofroň, Vojtěch ; Hadaš, Zdeněk (referee) ; Houška, Pavel (advisor)
Diploma thesis focuses on measurement and analysis of shaft motion, torque, angular velocity and vibration. First part of the thesis deals with general issue of acquiring a digital signal. Next part describes suitable sensors for each measurement type, and data acquisition hardware. The last theoretical part describes methods for measurement data analysis and vibration diagnostics. Practical part of the thesis describes shaft motion and torque measurements made on laboratory equipment, and vibration measurement made on real machine system. Each measurement includes measurement data analysis and evaluation.
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Design of control system for manipulating platform
Remiš, Matúš ; Andrš, Ondřej (referee) ; Hadaš, Zdeněk (advisor)
This thesis is a part of a project, in which two students participated. The aim of the project is the design and implementation of a wireless control system for the manipulation XY platform. This control system allows the manipulation platform to be battery powered and controlled wirelessly from PC. The project consists of the control system concept design, design of an electronic control unit prototype, firmware design and user control software. The parts of the project that are the subject of this thesis are firmware and software design. Within this work, a test drive unit was also created, which after connection with the control unit serves to verify the funcionalities of the control system. The proposed control system was successfully tested. The result of this work is therefore firmware and software, which can be futher developed within the project.
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Shape optimization of shield of asynchronous machine
Dítě, Pavel ; Hadaš, Zdeněk (referee) ; Dušek, Daniel (advisor)
The subject of this diploma thesis is to optimize the shield of asynchronous motor. In the thesis are given results of modal and the strain-stress analysis made for model of the shield, which is currently produced. To resolve this issue was used CAE programming system Pro/MECHANICA, which is based on method of geometric elements – GEM. The main output of this work is proposal of two new optimized shields of asynchronous motor and for these are presented results of modal analyse and the strain-stress analysis. Part of the thesis is design and technical-economic evaluation of casting methods for new shield production.
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Structure modeling of mechatronic systems with spot welds and their influence on the eigen frequency
Gajdík, Michal ; Hadaš, Zdeněk (referee) ; Vosynek, Petr (advisor)
This bachelor thesis examines various types of spot welds in Ansys Workbench 13. In first chapter of this thesis are described theoretical foundations of simulation modeling. In following phase are analyzed each methods of simulation modeling. Practical part is about realizing different types of spot welds and examining their impact on clamped boards. Outputs of this thesis are modal abilities of each executed type of spot weld. On attached CD are program annex and project in Ansys Workbench 13. The goal is to analyze differently modeled spot welds, displaying primal deflections and comparison of modal abilities.
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Modelling of vibration of dynamic systems with n-degrees of freedom
Horák, Petr ; Hadaš, Zdeněk (referee) ; Dušek, Daniel (advisor)
The aim of this work is to assemble mathematical model for given system of point masses. Compute the natural frequencies and their corresponding modes of vibration. Differentiations of vibration by various points of view are written in this work. The given system is analyzed and the equations of motion using two most common methods are written. Calculation procedure of mentioned physical quantities is written in order from simplified to complete system of point masses. This procedure is used in command file to express values numerical. The frequency response of the system and the displacement-time plots are shown. The impact of constant variability entering the calculation is described.
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Simulation of the 5th car door mechanism
Taušek, Martin ; Škoda, Jan (referee) ; Hadaš, Zdeněk (advisor)
This bachelor thesis deals with simulation of the 5th car door mechanism. The simulation runs in MSC.ADAMS software in which was made simulation model. The model contains several bodies which needed to have the same mechanical parameters as the CAD model of the real 5th door so the simulation was accurate. The opening of door is done by two gas springs, one on each side. These gas springs had to be correctly dimensioned to achieve fully opened door and safety movement as well. The thesis also deals with kinematic and dynamic analysis of the mechanism.
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Walking as alternative source of electrical energy
Smilek, Jan ; Hejč, Tomáš (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with problematics of using the Energy Harvesting principles for generating power from the human walking. Own acceleration measurement during walking was made on various locations of human body to provide data for self-developed MATLAB/Simulink energy balance script. The script clearly sets the possibilities and limits of vibration generator used in this application. Conclusions of the energy balance were used to specify requirements for development of vibration generator and few possible conceptions, working on frequencies close to 2 Hz and acceleration amplitudes 0,3 g, were presented, or simulated.
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Aplikace evolučního algoritmu na optimalizační úlohu vibračního generátoru
Nguyen, Manh Thanh ; Kovář, Jiří (referee) ; Hadaš, Zdeněk (advisor)
This thesis will deal with the use of artificial intelligence methods for solving optimization problems with multiple variables. A theorethical part presents problems of global optimization and overview of solution methods. For practical reasons, special attention is paid to evolutionary algorithms. The subject of optimization itself is energy harvester based on a piezoelectric effect. Its nature and modeling is devoted to one chapter. A part of the thesis is the implementation of the SOMA algorithm for finding the optimal parameters of the generator for maximum performance.
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