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LabVIEW instrument control toolbox
Mazal, Ctibor ; Aboelhassan, Mustafa Osman Elrayah (referee) ; Blaha, Petr (advisor)
This diploma thesis is containing the description of the LabVIEW Instrument Control Toolbox project. Initial preparations like the development environment choosing process, as well as the instrument driver layer choice are present along with the project requirements. A signal approach to the instrument control is defined and described in detail. This thesis also contains the main project development in The National Instruments LabVIEW and at the end, a detailed description and user guidance for each developed and fully integrated toolbox module.
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Robust control of PMS motors
Rajnošek, Michal ; Pohl, Lukáš (referee) ; Blaha, Petr (advisor)
This work is focused on robust control theory especially on methods H and analysis (structured singular value). The first part of the thesis contains theoreticle background to uncertainty modeling, to robust controller designs and to permanent magnet synchronous machine modeling. The second part presents concrette robust controller design which is tested in simulations and validated on a real motor. The influence of parameter changes on stability of closed loop system is discussed and description of obtained results is given in conclusions.
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Implementation of Electric Motor Control Algoritms in CompactRIO systems
Gléba, Gergely ; Veselý, Ivo (referee) ; Blaha, Petr (advisor)
This master’s thesis deals with the implementation of existing algorithms of electric AC motor control in Matlab Simulink to LabVIEW Control Design and Simulation. The first part of the thesis treats with the deduction of a mathematical model of an asynchronous motor, permanent magnet synchronous motor and with the theory of vector control of AC motors. In the next part there is a brief guide to create simulation algorithms in LabVIEW environment and to create the model of a motor with EMI functions in language C. The last part contains the comparison of Matlab Simulink and LabVIEW simulation tools.
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Fault relevance diagnostics of the PMSM under the inter-turn short circuit fault
Zezula, Lukáš ; Václavek, Pavel (referee) ; Blaha, Petr (advisor)
Tato práce popisuje matematické modelování mezizávitových zkratů fázového vinutí synchronního motoru s permanentními magnety, diskretizaci odvozeného modelu a diagnostiku závažnosti zkratu založenou na referenčním modelu. Popis zkratovaného stroje je vytvořen v proměnných statoru s uvažováním sérioparalelního zapojení vinutí a následně transformován do referenčního rámce rotoru pomocí rozšířené Clarkové a Parkovy transformační matice. Diskrétní ekvivalent navrženého modelu je vytvořen pomocí definované diskretizace lineárních časově variantních systémů, přičemž je uvažováno, že elektrická úhlová rychlost je časově variantní parametr s definovaným integrálem. Diskrétní model je transformován do referenčního rámce statoru, aby se maximalizovala perzistence vstupních signálů. Diagnostika závažnosti zkratu je poté realizována pomocí rekurzivního parametrického odhadu diskrétního modelu. Jedna z kapitol je věnována i popisu řídicího systému, neboť zkraty mohou ovlivnit stavové proměnné různým způsobem v závislosti na architektuře a volbě parametrů řídicího systému. Za každou kapitolou následuje experimentální ověření prezentovaných myšlenek.
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Automated tuning of drive controller
Adamec, Matúš ; Pohl, Lukáš (referee) ; Blaha, Petr (advisor)
This thesis deals with automated tuning of drive controller. To achieve this goal, system identification is needed. Therefore, the issue of identification is described at the beginning of this thesis. Spectral analysis was selected from many described methods. It was implemented in Matlab and also in C# language where was used averaging and Blackman-Tukey method. The C# application is linked to Beckhoff TwinCAT 3 and TwinCAT 2 runtime sytems that enable connections with real drive. Next, the problem of drive regulation is discussed and the results of using spectral analysis on real drives are shown. At the end of the thesis is described the algorithm of setting the speed controller with different types of frequency converters.
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Modern Algorithms of AC Servo-drives Control
Hrnčárek, Martin ; Blaha, Petr (referee) ; Václavek, Pavel (advisor)
This master thesis deals with the modern algorithms of the asynchronous induction machine and permanent magnet induction machine. It focuses at vector control, direct torque control and input-output feedback linearization. It also describes a library creation and its usages in the Matlab – Simulink environment. The final part of this thesis contains an implementation of chosen algorithms on the DSC Freescale 56F800E family.
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Design of the endpoint trajectory of the robotic arm using the virtual point method
Bubeník, Ľubomír ; Blaha, Petr (referee) ; Pivoňka, Petr (advisor)
The diploma thesis deals with a new approach to create a robotic arm trajectory. The first part descibes existing methods of trajectory planning. The second part shows virtual point method, implementation of the trajectory planning into the web environment and trajectory generation. Third part descibes the virtual robot model and designed comunnication protocols. The fourth part shows grafical user interface and his posibilities. The last part presents implemention of web aplication into industrial visualization.
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Robust Control of AC Electrical Drives
Pohl, Lukáš ; Prokop, Roman (referee) ; Brandštetter, Pavel (referee) ; Blaha, Petr (advisor)
The purpose of this disertation is to introduce and demonstrate a new approach to robust control of AC electrical drives. The proposed robust control method takes advantage of a nonlinear nature of AC motor d-q equations to construct self-scheduled LPV stator current controller. The benefit of this approach is in maitaining the robustness without any increase in conservatism of the H infinity controller. The resulting controller achieves fast and consistent response in the entire range of operating speeds. Rejection of the load torque disturbance is achieved with nonparametric H infinity speed controller in the outter loop of the cascade structure. The combination of LPV current controller and H infinity speed controller was verified on real-time simulation platform dSPACE ds1103. Simulation results for both types of AC motors (PMSM and IM) shows that the proposed solution is not only robust with respect to operating speeds but also impervious to wide range of load disturbance values.
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Modelling and control of FytoScope system
Stoklásek, Petr ; Glos, Jan (referee) ; Blaha, Petr (advisor)
The aim of this thesis is modelling of chamber for plant cultivation under defined conditions. First part of the thesis contains theoretical introduction to thermodynamics and humid air problematics. In the next part of thesis, the growth chamber model was designed. Model parameters were obtained during fytotron identification. Chamber control algorithm was designed using the model. The control algorithm was programmed into chamber control unit and its functionality was practically tested.
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