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Development of Customized Signal Processing SW for dynamic analysis of engineering systems
Witassek, Tomáš ; Kovář, Jiří (referee) ; Lošák, Petr (advisor)
Aim of this thesis is to create a user interface for signal processing mostly in the area of dynamics. First part of this thesis describes the theory of acceleration and force sensors, A/D conversion and corresponding issues such as sampling, quantization and types of convertors. Following part provides a brief summary of National Instruments products for vibration measurement. Next part of this thesis deals with methods of signal processing such as Fourier transform, frequency response functions and experimental modal analysis. Software described in the last part of this thesis is created in LabVIEW enviroment.
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Analysis of model operation of multi-degree-of-freedom energy harvester
Witassek, Tomáš ; Rubeš, Ondřej (referee) ; Hadaš, Zdeněk (advisor)
The first part of this bachelor’s thesis is an overview of vibration energy harversters with multiple degrees of freedom. Several options of broadening the usefull frequency bandwidth thanks to multiple degrees of freedom are described in the overview. The following part is a model in Matlab & Simulink analyzing behaviour of a vibration-powered generator with a harmonic excitation and another one with a real excitation. The main focus is on the output electrical power and energy in relation to geometrical parameters and electromagnetic damping.
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Development of user SW for experimental modal analysis
Witassek, Tomáš ; Hadaš, Zdeněk (referee) ; Lošák, Petr (advisor)
The aim of this thesis is to create an application with a user interface for estimating modal parameters using experimental modal analysis. The application was developed in LabVIEW programming environment. The implemented methods in the application include Peak Picking method, Circle-Fit method, Frequency modal identification method of lightly damped structures and Ibrahim Time Domain method. Verification of this application was accomplished by measurement and subsequent estimation of modal parameters of three different objects. Modal parameters estimated from the measurement were then compared with the results of finite element method.
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Development of Customized Signal Processing SW for dynamic analysis of engineering systems
Witassek, Tomáš ; Kovář, Jiří (referee) ; Lošák, Petr (advisor)
Aim of this thesis is to create a user interface for signal processing mostly in the area of dynamics. First part of this thesis describes the theory of acceleration and force sensors, A/D conversion and corresponding issues such as sampling, quantization and types of convertors. Following part provides a brief summary of National Instruments products for vibration measurement. Next part of this thesis deals with methods of signal processing such as Fourier transform, frequency response functions and experimental modal analysis. Software described in the last part of this thesis is created in LabVIEW enviroment.
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Analysis of model operation of multi-degree-of-freedom energy harvester
Witassek, Tomáš ; Rubeš, Ondřej (referee) ; Hadaš, Zdeněk (advisor)
The first part of this bachelor’s thesis is an overview of vibration energy harversters with multiple degrees of freedom. Several options of broadening the usefull frequency bandwidth thanks to multiple degrees of freedom are described in the overview. The following part is a model in Matlab & Simulink analyzing behaviour of a vibration-powered generator with a harmonic excitation and another one with a real excitation. The main focus is on the output electrical power and energy in relation to geometrical parameters and electromagnetic damping.
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