|
|
Vibration at turning
Procházka, Luděk ; Kolář, Ladislav (referee) ; Fiala, Zdeněk (advisor)
This thesis deals with vibration which occurs during the cutting process in turning. It describes vibration, types of vibration and its causes. It also provides a basic description of the turning technology. The main part of the thesis is a description of self-excited vibrations, an unwanted phenomena in the turning process, which needs to be eliminated or reduced. The experimental section of the thesis aims to measure natural frequencies of the machine-tool-workpiece system and to create a stability diagram for this process.
|
|
|
Noise and vibrations in air-conditioning systems
Libřický, Stanislav ; Hejčík, Jiří (referee) ; Jedelský, Jan (advisor)
This bachelor’s thesis is focused on the sources of noise in air-conditioning equipment and potential noise reduction. The thesis also includes a detailed list of the sources of noise. Thoroughly describes only the main ones, which the fans, aerodynamic noise of air conduit and chillers. The thesis continues with description of methods of the reduction of selected causes of noise in a certain environment. The final part of the bachelor’s thesis includes listing and description of laws and regulations affecting issue of noise in air-conditioning equipment.
|
|
|
Noise Reduction Methods in Automotive Design
Kubica, Petr ; Janoušek, Michal (referee) ; Prokop, Aleš (advisor)
The aim of this bachelor thesis is create a research study about noise reduction methods in automotive design. The introduction of this work deals with acoustic and the influence of noise on people. Furthermore it deals with ways of noise creation in a car and its suppression. In the end of this work there is a valorization of certain methods at noise suppression of a personal vehicle.
|
|
| |
|
|
Energy Harvesting for Automotive Applications
Novotný, Jan ; Kovář, Jiří (referee) ; Hadaš, Zdeněk (advisor)
This thesis goal is to get information about Energy Harvesting and subsequent confrontation of it. The Energy Harvesting technology deals with process of absorption so-called free energy and conversion it into electric energy. The reason for doing that is mostly feeding wireless sensors. When the search in this area is accomplished on bases of existing constructional principles the concrete device (generator) is designed. This system might be unlimited power source for selected automotive application.
|
|
|
Regenerative chatter in turning
David, Václav ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
Regenerative chatter in turning negatively affects the cutting process, the tool live and the machined surface. In this work is a vibration discriebed by using mathematical formulas or terms. There are listed some causes of creation vibration in turning and some basic methods of complete removal or partial reduction. The second part of this work contains examples of measure and analysis in connection with using of modern software.
|
|
|
Study of Energy Harvesting in Aeronautic Applications
Březina, Martin ; Kovář, Jiří (referee) ; Hadaš, Zdeněk (advisor)
Motivation of this study was to clarify the possible solutions to reduce the number of general aircraft security controls with keeping the required safety of flight operations. Among the appropriate approach to solving the problem seems to be the use of energy harvesting devices to power wireless monitoring system of aircraft structures during their operation. The work deals with the various alternatives of using the ambient energy available in the general air transport and processing methods. The study also includes the selection of a particular type of processing available ambient energy and determination of parameters of selected energy-harvesting generator using simulation modeling and performance to meet the power requirements of monitoring system sensors.
|
|
|
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.
|
|
|
Bevel gear noise
Foltis, Aleš ; Kalíšek, Libor (referee) ; Kaplan, Zdeněk (advisor)
The target this bachelor?s thesis is assesment suspension single flank of bevel gear on noise level total axletree.And further we deal with fabrication and geometry of conical gear especially Oerlicon and also with formation, shape and position of contact pole of curved jag. At the close thesis evaluate optimum assembly position this couple of one's wheelwork plus her influence over noise level total axletree at given to modifications contact field tooths.
|
|
| |
guest ::
