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Sensorless control of BLDC motor
Hrbáč, Zbyněk ; Grepl, Robert (referee) ; Sova, Václav (advisor)
This thesis is focused on the sensorless control of BLDC motor using the Extended Kalman filter. In the first section, process of EKF implementation for estimating rotor speed and electrical angle is described. For this estimation, EKF uses non-linear BLDC motor model and some measurement containing random noise. Second part deals with designing methodology to measure and estimate the quality of BLDC motor sensorless control. Best results were achieved with total current entering power electronics ripple analyzation. In the last section, several BLDC sensorless control algorithms were evaluated.
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FPGA application for control and modelling of BLDC motor
Sova, Václav ; Toman, Jiří (referee) ; Grepl, Robert (advisor)
Thesis deals with the challenges in the field of BLDC motors control with the utilization of Field Programmable Gate Arrays (FPGA). Using the modular dSPACE hardware with the FPGA board, these issues are solved: sensored and sensorless control, real-time simulation of BLDC motor and control of BLDC motor in degraded mode. FPGA design is made using the System Generator for DSP from Xilinx. The side effect of work is to show that with the expansion of high-level tools for FPGA design, the implementation of algorithms for FPGA is relatively quick and efficient and does not require years of experience and big knowledge of field programmable gate arrays. The implementation of algorithms on FPGA instead of processors brings many advantages, in the first place the high speed processing and low latency.
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Control of sliding window in passanger car
Kebis, Tobiáš ; Štetina, Jakub (referee) ; Sova, Václav (advisor)
The purpose of this bachelor’s thesis is designing the electronics and control program for opening car window. Real model of car door was used for realisation, where were implemented control and power electronic. 12V industry power supply was used to power the electronics. For controlling the motor, H-bridge from Peter Horák’s thesis was used. The main problem discussed in this work is design of control electronics, based on microcontroller dsPIC33fj128mc804 and its programming in Simulink environment. Program had to meet certain requirements, and after the testing and optimising, the whole model was completed and got ready for presenting and teaching purposes.
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Design of Power HIL unit for Li-pol cell simulation
Pribulla, Daniel ; Sova, Václav (referee) ; Chalupa, Jan (advisor)
This thesis deals with design and construction of a Li-po cell Power-HIL simulator intended for testing of a small wireless module's powering. The simulator is based on a battery model which includes the influence of temperature and battery degradation on battery parameters. To estimate model parameters a series of tests on real Li-po cell with capacity 250mAh were performed. Charging and discharging tests were performed by different temperatures of the battery. In purpose of this test a simple thermal chamber was constructed. Design of the power electronics of the device was tested in the Simscape library of the Matlab Simulink. The result is a working prototype of the simulator tested for charging and discharging of batteries with capacity in range 100-1500 mAh. The simulator can be controlled with graphical user interface capable of setting the battery parameters and real time observation of the model variables.
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Optimization of four-bar mechanism geometry for the predescribed trajectory
Korytár, Lukáš ; Sova, Václav (referee) ; Grepl, Robert (advisor)
This thesis deals with the optimization of arm lengths of four-bar RRRR mechanism using matrix kinematics. It compares and describes the methods, which are available in MATLAB software environment for this purpose. Consequently, an optimization algorithm using fmincon function is designed for which Monte-Carlo algorithm performs the first estimates. Elementary requirements for the proposed algorithm are devised in order to accurately duplicate the predescribed trajectory.
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Recognizing of the gesture, based on data from accelerometer, used to control a car model
Zermegh, Tomáš ; Sova, Václav (referee) ; Lamberský, Vojtěch (advisor)
This project deals with the usage of development kit Chronos ez430 to demonstrate fundamental movements based on the recognition of gestures. Recognition of basic gestures for movements (forward, stop, backwards and turning) is the fundamental part of the work which is based on formulating algorithm. The formulating of algorithm for data processing runs under Matlab/Simulink. The algorithm is converted into the C language and with the help of Code Composer Studio is integrated into kit Chronos ez430.
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HIL Simulation of Electronic Throttle
Maliszewski, Michal ; Chalupa, Jan (referee) ; Sova, Václav (advisor)
This thesis deals with the Hardware in the Loop (HIL) simulation of an electronic throttle. In the following text its mathematical model for different options of friction and hardstops is deduced. Model parameters were obtained by measurement on the real throttle. In the next step the thesis aims on designing the suitable control algorithm, which is used for own HIL simulation. The output of the thesis is the choice of the best model with respect to accuracy and computation time of the simulation.
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Analysis and modeling of sensors and actuators of LEGO Mindstorm
Hanuš, Pavel ; Sova, Václav (referee) ; Grepl, Robert (advisor)
The focus of this thesis is a detailed analysis and modeling of selected sensors and actuators of programmable robotic kit LEGO Mindstorms NXT 2.0. Actuators are represented by servomotors and the selected sensors include a color and an ultrasonic sensor, both available in the basic version of the kit, and a gyro sensor made by HiTechnic. The thesis describes the realization and evaluation of experiments performed for each element resulting in graphical representations of the sensors’ properties, models in Simulink environment representing the respective elements, and datasheets – overviews of parameters and characteristics of the individual sensors and actuators. The detailed analysis of the sensors and servomotors of the kit provides an overview of the possibilities, but also the limitations of the particular elements. This knowledge can be subsequently used for a wide range of possible applications of the kit.
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Testing unit for proportional valves
Sova, Václav ; Tlustoš, Jiří (referee) ; Grepl, Robert (advisor)
This bachelor thesis deals with development and construction of a portable testing unit for hydraulic proportional valves, whose assumption of usage is primarily for maintenance, inspection and commissioning of hydraulic machinery in operation. The thesis also includes an introduction to the issue of proportional valves and the existing testing units. Through the work, the development and design of electronics, based on dsPIC microcontroller is introduced and its utility program will be developed using Kerhuel Toolbox in Simulink environment. The result of the work will be a prototype of testing unit.
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