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Use of neural networks for estimation of dynamic variables
Dufek, Martin ; Repka, Martin (referee) ; Zháňal, Lubor (advisor)
The aim of the thesis is to verify the applicability of neural networks to predict vehicle dynamic variables. Some vehicle dynamic variables are difficult to measure or need to be calculated, and measuring such quantities can be very expensive. However, If neural networks could predict values with acceptable error, this would be a more affordable and economical method. Verification was performed by creating two recurrent neural networks to estimate the quantities of directional deviation angle and longitudinal forces on all wheels of the car. The paper describes the steps of network creation from processing the input data to evaluating the network predictions. The results show that neural networks can be used to determine dynamic quantities and replace expensive measurements for some purposes. Finally, important insights gained during the creation of neural networks are formulated that can help with the creation of new networks for the estimation of automotive dynamic quantities, and further possible improvements of the created neural networks are outlined.
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Optimization stacking boxes on a pallet
Havlíček, Jiří ; Brablc, Martin (referee) ; Adámek, Roman (advisor)
This thesis focuses on the Distributors Pallet Loading Problem (DPLP), considered one of the most challenging problems in optimizing limited space filling. DPLP poses a challenge due to its dynamic nature and the variety of dimensions and weights loaded boxes, including requirements for stability, maximum load capacity, and limited rotations. A strategy is proposed for selecting the position, orientation, and sequence of available boxes under the assumption that only a few boxes are known. Within the scope of the work, a state space search algorithm is designed, implemented in MATLAB, and subsequently validated through experiments. Furthermore, a simulation of pallet stability is conducted using SimScape Multibody and a collision-free trajectory planning for a robotic manipulator is performed using the Robotic Toolbox.
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Evaluation of information systems via fuzzy logic
Vraniaková, Lýdia ; Václavík, Lukáš (referee) ; Janková, Zuzana (advisor)
The diploma thesis is deals with analysis of the information system of Gevorkyan, a.s. and choosing a new information system. The aim of this thesis is to create a fuzzy model to support the selection of a new information system in the MS EXCEL and MATLAB environment. The created model will help choosing a new information system for the company. In the theoretical part of the thesis, the problem of fuzzy logic and the creation of a fuzzy model in the MS EXCEL and MATLAB environment is presented. The analytical part is focused on the analysis of the current state of the company and the information system in use using the McKinsey method and the HOS8 and ZEFIS methods. The design part describes the created fuzzy model in both program environments and a comparison of the achieved results.
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Analysis of strut frames structure using the tensegrity principle
Marek, Martin ; Lukáš, Petr (referee) ; Jadrná, Lucie (advisor)
This bachelor thesis focuses on strut frame structures using the tensegrity principle. It outlines a theoretical introduction to strut frame structures with an explanation of basic conditions of strut frame structure existence. It further describes the basic theory of strut frame structures using the tensegrity principle, their characteristics and their advantages and disadvantages. In the research section the occurence of biotensegrity in nature and human anatomy is presented. A description of use of tensegrity in practice is also presented. After the research section a computational section follows, this section contains basic thoughts used in the 2D model such as the considered materials and the strut frame geometry. A numerical computation in the ANSYS simulation software and an anlytical computation in MATLAB is presented. Last, a numerical computation of a 3D strut frame model with the tensegrity principle is described.
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Design and production of pendulum tuned mass damper
Čupr, Michal ; Rubeš, Ondřej (referee) ; Kšica, Filip (advisor)
In a real environment, various external conditions can cause vibration of the machines, buildings or other systems. To prevent vibration of the system with low frequencies, pendulum tuned mass damper can be installed. The first part of this thesis describes the oscillation of simple structures for systems with one or two degrees of freedom. This analysis is then applied to mechanism that contains pendulum tuned mass damper. The damper’s principle is explained along with its important parameters and properties. Design and tuning of the damper are explained. Text continues with description of several types of the damper and there are mentioned some examples of their applications. In the final part, a model of the mechanism with pendulum tuned mass damper is designed and it is described mathematically using programs Matlab and Ansys. Subsequently, the model was made and the real model was compared with mathematical model. It was found that effectiveness of the damper depends most on the natural frequency of the system and the dissipation energy from it. The manufactured pendulum damper effectively dampens the oscillation of the real model, and the course of its oscillations corresponds to the mathematical model.
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Control Electronics for Electromagnetic Ball Accelerator
Dočkal, Tomáš ; Harvánek, Michal (referee) ; Král, Jan (advisor)
The goal of this bachelor's thesis was the design and implementation of an electromagnetic accelerator for a steel ball in a closed circular track. Electromagnetic accelerator serves as a demonstrator of particle accelerator functionality and as a game with the aim of engaging students in the study of electrical engineering. The work includes designing the coil using an algorithm in Matlab, which optimizes parameters to achieve maximum magnetic field intensity while considering limited power loss and voltage. The power electronics were designed and the functionality of the circuit concept was verified through simulation. The printed circuit board (PCB) for the power electronics, which also includes the control unit, was designed in KiCad. The system incorporates both passive and active cooling and is equipped with temperature sensors to ensure safe operation. The control part of the system was designed using the ESP-WROOM-32 development module, which allows for remote control and monitoring via a web interface. Optical sensors were designed to enable precise detection of the ball's position and speed. The mechanical part includes the fabrication of the coil frame and the mounts for the optical sensors using 3D printing. The PCB, along with the power supply, was mounted in a casing.
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Locating and counting people using radio networks
Varanai, Lukáš ; Zamazal, Michal (referee) ; Valach, Soběslav (advisor)
The aim of this bachelor thesis is the design and implementation of an application for locating people in indoor spaces. The thesis provides an overview of the available technologies, methods, user device hardware options and programming languages for the purpose of creating a mobile phone application. Subsequently, the design and implementation of an application for person localization and test measurements is discussed. The thesis concludes with a summary of the functionality of the implemented application and suggestions for future improvements.
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Steady State Calculations of Model IEEE Networks
Kintr, Kryštof ; Vyčítal, Václav (referee) ; Krčál, Vít (advisor)
This bachelor thesis is focused on power-flow calculation. At first the problem is initially discussed in general. This is followed by a brief description of the mathematical methods used in the calculation, followed by an overview of the software that enables this calculation. Then, the modelling of some basic power system elements is described and selected IEEE test feeders are described in more detail. Thesis continues by a description of the OpenDSS computational program and its capabilities, including a description of the features of the related OpenDSS-G program. The principles of code writing are presented using examples from a selected test feeeders IEEE 13 and IEEE 30. It is followed by a description of automated computation, for which a script was written in MATLAB and a unified data entry format was suggested in EXCEL, which is the main contribution of the thesis. Finally, the results obtained by the automated computation of selected test feeders from OpenDSS are compared with the results from the demo codes for OpenDSS as well as from other computational programs, pandapower and GridLAB-D.
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Indoor Positioning Based on Inertial Measurement Unit
Coufal, Marek ; Vychodil, Josef (referee) ; Král, Jan (advisor)
This bachelor’s thesis deals with inertial navigation intended for indoor usage. The algorithm for processing accelerometer and gyro data is described along with their position in equations of motion. Various coordinate systems are defined for ease of manipulation of vector quantities, including conversions and rotations between frames. The thesis also addresses the design of the hardware for the inertial unit, including the minimum requirements for fast data recording. Some chapters are dedicated to the design of the printed circuit board and the implementation of the device, followed by the development of firmware and software for data logging and processing.
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