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Modern Mathematical Methods of the Analysis and Synthesis of AC Machines
Cipín, Radoslav ; Skala,, Bohumil (referee) ; Richter, Aleš (referee) ; Patočka, Miroslav (advisor)
The doctoral thesis is divided into three main parts with a focus on induction motors. The first part deals with the electromagnetic design and analysis of windings of AC ma-chines. There is introduced the density of conductors, which describes the distribution of the windings in the slots. There is derived general formula for calculation of the total winding factor applicable to any type of winding. The second part of this work deals with the acceleration method of the induction motors torque-speed characteristics measurement. The measured characteristics are used for exact identification of the equivalent circuit parameters of induction motor. The third section is focused on a very precise identification of the equivalent circuit parameters of induction motor in the form of -circuit. The identification is based on mutual comparison of measured and calculated torque-speed and current-speed characteristics.
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Modeling and analysis of laboratory rotational pendulum
Nedvědický, Pavel ; Bastl, Michal (referee) ; Brablc, Martin (advisor)
This bachelor thesis aims at modelling, identification and control of Furuta pendulum. System was described via mathematical equations and simulation model was created in Matlab/Simulink. Parameters of rotary inverted pendulum were estimated using the simulation model. Then the thesis deals with swing up via torque impulse, energy control and PD regulator. In the part dealing with friction five compensation models were created. They include change of friction during rotation and one of them is dynamic model, Reset Integrator. Models were verified by adding them as an input to an actuator and testing them. To stabilize pendulum in inverted position state feedback control with state observer was designed using LQR method. Final regulation included all knowledge obtained during this thesis.
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Permanent Magnet Synchronous Motor Parameters Identification
Dušek, Martin ; Veselý, Ivo (referee) ; Blaha, Petr (advisor)
This work deals with the on-line identification of permanent magnet synchronous motor parameters. There is discussed the use of four different identification algorithms based on the least squares method and MRAS. The functionality of the algorithms is verified in Matlab - Simulink environment. Simulation results are compared in terms of rate and accuracy of identification, resistance to noise and other factors.
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Synchronous motor parameter identification
Veselý, Ivo ; Veselý, Libor (referee) ; Blaha, Petr (advisor)
We often use a vector control for controlling of synchronous motor with permanent magnets. To get this control more effective we need to know the parameters of controlled motor. This document describes several methods, which deal with this problem and they are trying to expand them. We are talking about method uses Ohm’s law and the knowledge of motor model and method uses improved frequency analysis. The text below includes the principles of these methods and also identification verification of parameters by means of simulations on a created motor model. The final result of this work is the library of functions, which identificate on the basis on the improved frequency analysis.
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Control of Linear Inverted Pendulum Exhibition Model
Vávra, Patrik ; Sova, Václav (referee) ; Brablc, Martin (advisor)
The main aim of this bachelor thesis is to create robust linear inverted pendulum control. After system identification comes the creation of regulators from which the most suitable is chosen for the final control of the pendulum. Another point of thesis is to develop a swing-up controller that takes care of swinging the pendulum into an unstable position and swing-down controller to stabilize the pendulum as quickly as possible in a stable pendulum position. The following sections of the thesis include the design of the control structure, safety measures and evaluation of the performed testing.
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Control of ABS educational model
Kubisz, Jan ; Spáčil, Tomáš (referee) ; Sova, Václav (advisor)
This bachelor´s thesis deals with renewal of education model for ABS braking simulation, determination of parameters of this model and following aplication of those parameters for simulation model compilation. Second part is to create two types of regulation with known speed of roadway and with unknown speed of roadway. Created regulators are then tested on real system to verify their funcionality.
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Sensorless control of BLDC motor
Križan, Jakub ; Toman, Jiří (referee) ; Grepl, Robert (advisor)
This thesis is focused on problematics of control of brushless DC motor in the sensor and also in the sensorless mode. Also it interprets possibilities of BLDC motor control with one faulty sensor and derivation and simulation of mathematical model. First part mentions options of rotor position sensing as well as existing methods of sensorless BLDC motor control. Second part describes control algorithms of sensor and sensorless motor control realised on device dSPACE and also realisation of faulty sensor control algorithm. Third part deals with derivation of mathematical model, its realisation using Matlab Simulink software and identification of its parameters. Last part concludes results and compares control methods used on the real system.
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Fixed-wing UAV simulation modeling
Příleský, Libor ; Mašek, Petr (referee) ; Krejsa, Jiří (advisor)
Nowadays number of UAVs is still increasing. If we want to design their autopilot system, we need a simulation model to test and tune our autopilot design. This thesis is about creating such model fo small fixed wing UAV. This thesis contain information how to create the model, which equations to use and what various parameters mean. One of the possibilities is parameter identification from measured data. In later part of this paper is a small research of this topic and implementation of two of them. Virtual model, which is obtained at the end of this work, accomplished its primary goal and was used to initial autopilot design. Implemented identification methods worked as well, but we didn't succeed in upgrading the model parameters due to the defects during the data measurement.
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Parameters identification of DC machine coupled model
Kraml, Aleš ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
This thesis deals with design and implementation of experiments leading to identification of parameters of a DC machine, creation of its model with coupled electrical, mechanical and thermal part. The first part describes various methods of modeling thermal resistance between body and ambient and the methods are compared. Furthermore, methods of identifying coefficient of damping and identification of moment of inertia are described. Second part of the thesis describes preparation and identification of resistance of the winding, inductance, heat capacities of rotor and housing and parameter c and measurement of damping coefficients. In the next part, the creation of a Simulink model of the DC machine is described. Furthermore, this thesis describes the algorithm for identification of parameters of an existing machine and the possibilities of using the model and identification in the development of a new machine. The next part assesses using the algorithm of identification and model as a basis for the creation of a virtual twin.
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