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Online detection of simple voice commands in audiosignal
Zezula, Miroslav ; Březina, Lukáš (referee) ; Krejsa, Jiří (advisor)
This thesis describes the development of voice module, that can recognize simple speech commands by comparation of input sound with recorded templates. The first part of thesis contains a description of used algorithm and a verification of its functionality. The algorithm is based on Mel-frequency cepstral coefficients and dynamic time warping. Thereafter the hardware of voice module is designed, containing signal controller 56F805 from Freescale. The signal from microphone is conditioned by operational amplifiers and digital filter. The third part deals with the development of software for the controller and describes the fixed point implementation of the algorithm, respecting limited capabilities of the controller. Final test proves the usability of voice module in low-noise environment.
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Design of electromagnetic laboratory shaker
Vaněček, Michal ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
My thesis describes the design of a laboratory electromagnetic vibrator, which will be used for testing of the vibrating microgenerators. In the first part of my thesis is the search of selected laboratory electromagnetic vibration generators. There is also formulated its own proposal and subsequent tuning of the required dimensions and characteristics of the laboratory electromagnetic vibration generator. The tuning of necessary properties and dimensions is formed as modeling and simulating in programms Matlab / Simulink and ANSYS. The conduct of laboratory electromagnetic vibration generator is implemented in MATLAB / Simulink. Design and dimensions of the laboratory electromagnetic vibration generator is made in SolidWorks.
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Modelling of linear power drive with DC motor for control purposes
Vrbka, Michal ; Březina, Lukáš (referee) ; Houška, Pavel (advisor)
In my diploma thesis, I developed the model of a linear actuator for the control purposes. The first part summarizes the literature research of currently available linear actuator systems. The work further describes some of the capabilities of the simulation environment Matlab which was used for the creation of the computer model of linear actuators. In the last part, this theoretical model is compared with already available physical model of the system.
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Control units for small DC motors with universal software interface
Hlouš, Jaroslav ; Březina, Lukáš (referee) ; Houška, Pavel (advisor)
The purpose of this thesis is to design and implementation of the control unit for DC motors. Design is based on the concept of universal communication interface, which has been designed for simplification of communication between individual control systems. Control unit has been realized for DC motors within supply voltage range from 6 to 48 V, and maximal continuous current 2,5 A. For realization, we have used microcontroller LPC2103, and full bridge driver TLE 6209. In the thesis, we have described particular developmental steps of the control unit.
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Stewart platform – model
Těšický, Lukáš ; Vetiška, Jan (referee) ; Březina, Lukáš (advisor)
The bachelor thesis deals with the creation of a multi-body mechatronic model of a Stewart platform in MSC Adams. There are also analyzed possibilities of utilization of the Stewart platform and other parallel manipulators in the industry.
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Simulation modelling of VNT mechanism kinematics
Zelda, Jan ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with the modeling of kinematics VNT Turbocharger mechanism. In the first part, there is a general overview of supercharging combustion engines, search optimization methods and overview of the types of simulation models. Creating a simulation model and performing sensitivity analysis of each part follows. The final part of the thesis reflects the impact of clearance in the joins of the mechanism.
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Utilization of multi-body simulation tools in subject Dynamics
Lokšeninec, Ľuboš ; Houfek, Lubomír (referee) ; Březina, Lukáš (advisor)
The bachelor’s thesis is conducted in purpose of modernization the dynamics theory teaching methods by the multi-body simulation systems. Thesis acquaints student with accessible simulation systems and provides a manual how to compose virtual models of physic frameworks. Student is introduced to the basic options of current multi-body system by means of pre-processed examples focused on rolling, oscillation and inertia moment. Thesis refers to present teaching methods with models composed in Matlab/Simuling system with SimMechanics sublibrary.
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Analyses of Mechanical Tasks in SolidWorks Motion
Cikánek, Pavel ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
The main goal of this thesis is to create and to simulation the samples from area of the kinetics and the dynamics in CAD system in order to be used as the teaching models. The examples will be created as simply and easily rebuilt 3D models in CAD program SolidWorks and they will be analysed in the Motion modul. The main task is to compare the results from SolidWorks Motion program with the current solution, eventually with the other CAD system. At the end the advantages and the disadvantages of SolidWorks Motion program will be evaluated.
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