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Dynamic model of nonlinear oscillator with piezoelectric layer
Sosna, Petr ; Lošák, Petr (oponent) ; Hadaš, Zdeněk (vedoucí práce)
This diploma thesis aims to analyze the behavior of a nonlinear magnetopiezoelastic vibrating beam. First, a~single-degree-of-freedom model of a real-world nonlinear energy harvester is developed. Numerical simulations of magnetic interaction provide a~basis for the mentioned stiffness nonlinearity. Qualitative and quantitative analyses of how the frequency response of such a~ system is affected by load resistance, amplitude of harmonic base excitation, and magnet separation distance are performed. Magnet separation distance acts as the main parameter that affects the level of nonlinearity and type of behavior. Therefore a significant portion of the work is dedicated to bifurcation diagrams, where the behavior and performance of the harvester are analyzed as a~function of magnet separation distance. These bifurcation diagrams also lead to performance maps, that could form the basis for efficient real-time tuning of the energy harvester. Important phenomena that can influence the harvested energy, when the system is excited by non-harmonic force, are also present. These include force impulses or noise-induced basin hopping.
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Elektromechanické pohonové soustavy obráběcích strojů
Knobloch, Josef ; Synek, Miloš (oponent) ; Blecha, Petr (vedoucí práce)
Tato bakalářská práce se zabývá popisem komponentů elektromechanických pohonových soustav. V úvodu je vymezen pojem elektromechanická soustava a dále jsou již jednotlivě popsány používané typy motorů, převodů, hřídelových spojek a kuličkových šroubů. U každé součásti jsou také popsáni zástupci výrobců na českém trhu. V poslední části práce je uveden příklad výpočtu elektromechanické posuvové soustavy.
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Energy Harvesting Power Supply for MEMS Applications
Smilek, Jan ; Leuchter, Jan (oponent) ; Ondrůšek, Čestmír (oponent) ; Hadaš, Zdeněk (vedoucí práce)
This thesis deals with the development of an independent power source for modern low-power electronic applications. Since the traditional approach of powering small applications by means of primary or secondary batteries lowers the user comfort of using such a device due to the necessary periodical maintenance, the novel power source is using the energy harvesting approach. This approach means that the energy is scavenged from the ambience of the powered application and converted into electricity in order to satisfy the power requirements of the newest MEMS electrical devices. The target applications for the new energy harvesting device are seen in wearable and biomedical electronic devices. That places challenging requirements on the energy harvester, as it has to harvest sufficient energy from the ambience of human body, while fulfilling practical size and weight constraints. After the preliminary requirements setting and analyses of possible sources of energy a kinetic energy harvesting principle is selected to be employed. A series of measurements is then conducted to obtain and generalize the kinetic energy levels available in the human body during various activities. A novel design of kinetic energy harvester is then introduced and developed into the form of a functional prototype, on which the actual performance is evaluated. Aside from the actual new harvester design, the thesis introduces an original way of improving the power output of the inertial energy harvesters and provides statistical data and models for the human energy harvesting usability prediction.
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Control of the Electromechanical System with a Linear Motor
Judinyová, Katarína ; Blaha, Petr (oponent) ; Václavek, Pavel (vedoucí práce)
The submitted Master’s thesis deals with the general principle of the electric drives’ functioning and with the construction of a synchronous electric motor. A comparison of a linear drive and a rotary drive with rack and pinion system is provided, as well as an overview of common type linear drives. A mathematical model of a rotary synchronous motor, the Clark’s and Park’s transformation and the principle of vector control is explained. A method of the linear parameters’ conversion to the rotary equivalents is demonstrated. A block diagram to motor control is designed. The control quality is tested by various criteria. Lastly, there is a simulation provided on how the changes of motor’s parameters affect the control quality.
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Automatická optická inspekce
Holík, Milan ; Špinka, Jiří (oponent) ; Starý, Jiří (vedoucí práce)
Tato diplomová se zabývá návrhem a realizací elektromechanického pozičního systému pro automatickou optickou inspekci DPS větších rozměrů a vlastní optickou inspekcí. Problematika je rozčleněna do několika hlavních oblastí a to na mechanickou část, řídící hardware a softwarovou část. V každé části je proveden rozbor problému a vybráno nejvhodnější řešení.
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Dynamic model of nonlinear oscillator with piezoelectric layer
Sosna, Petr ; Lošák, Petr (oponent) ; Hadaš, Zdeněk (vedoucí práce)
This diploma thesis aims to analyze the behavior of a nonlinear magnetopiezoelastic vibrating beam. First, a~single-degree-of-freedom model of a real-world nonlinear energy harvester is developed. Numerical simulations of magnetic interaction provide a~basis for the mentioned stiffness nonlinearity. Qualitative and quantitative analyses of how the frequency response of such a~ system is affected by load resistance, amplitude of harmonic base excitation, and magnet separation distance are performed. Magnet separation distance acts as the main parameter that affects the level of nonlinearity and type of behavior. Therefore a significant portion of the work is dedicated to bifurcation diagrams, where the behavior and performance of the harvester are analyzed as a~function of magnet separation distance. These bifurcation diagrams also lead to performance maps, that could form the basis for efficient real-time tuning of the energy harvester. Important phenomena that can influence the harvested energy, when the system is excited by non-harmonic force, are also present. These include force impulses or noise-induced basin hopping.
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Energy Harvesting Power Supply for MEMS Applications
Smilek, Jan ; Leuchter, Jan (oponent) ; Ondrůšek, Čestmír (oponent) ; Hadaš, Zdeněk (vedoucí práce)
This thesis deals with the development of an independent power source for modern low-power electronic applications. Since the traditional approach of powering small applications by means of primary or secondary batteries lowers the user comfort of using such a device due to the necessary periodical maintenance, the novel power source is using the energy harvesting approach. This approach means that the energy is scavenged from the ambience of the powered application and converted into electricity in order to satisfy the power requirements of the newest MEMS electrical devices. The target applications for the new energy harvesting device are seen in wearable and biomedical electronic devices. That places challenging requirements on the energy harvester, as it has to harvest sufficient energy from the ambience of human body, while fulfilling practical size and weight constraints. After the preliminary requirements setting and analyses of possible sources of energy a kinetic energy harvesting principle is selected to be employed. A series of measurements is then conducted to obtain and generalize the kinetic energy levels available in the human body during various activities. A novel design of kinetic energy harvester is then introduced and developed into the form of a functional prototype, on which the actual performance is evaluated. Aside from the actual new harvester design, the thesis introduces an original way of improving the power output of the inertial energy harvesters and provides statistical data and models for the human energy harvesting usability prediction.
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Automatická optická inspekce
Holík, Milan ; Špinka, Jiří (oponent) ; Starý, Jiří (vedoucí práce)
Tato diplomová se zabývá návrhem a realizací elektromechanického pozičního systému pro automatickou optickou inspekci DPS větších rozměrů a vlastní optickou inspekcí. Problematika je rozčleněna do několika hlavních oblastí a to na mechanickou část, řídící hardware a softwarovou část. V každé části je proveden rozbor problému a vybráno nejvhodnější řešení.
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Control of the Electromechanical System with a Linear Motor
Judinyová, Katarína ; Blaha, Petr (oponent) ; Václavek, Pavel (vedoucí práce)
The submitted Master’s thesis deals with the general principle of the electric drives’ functioning and with the construction of a synchronous electric motor. A comparison of a linear drive and a rotary drive with rack and pinion system is provided, as well as an overview of common type linear drives. A mathematical model of a rotary synchronous motor, the Clark’s and Park’s transformation and the principle of vector control is explained. A method of the linear parameters’ conversion to the rotary equivalents is demonstrated. A block diagram to motor control is designed. The control quality is tested by various criteria. Lastly, there is a simulation provided on how the changes of motor’s parameters affect the control quality.
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Elektromechanické pohonové soustavy obráběcích strojů
Knobloch, Josef ; Synek, Miloš (oponent) ; Blecha, Petr (vedoucí práce)
Tato bakalářská práce se zabývá popisem komponentů elektromechanických pohonových soustav. V úvodu je vymezen pojem elektromechanická soustava a dále jsou již jednotlivě popsány používané typy motorů, převodů, hřídelových spojek a kuličkových šroubů. U každé součásti jsou také popsáni zástupci výrobců na českém trhu. V poslední části práce je uveden příklad výpočtu elektromechanické posuvové soustavy.
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