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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
251

Simulátor přenosových funkcí silnoproudého vedení v NS3 / Power Line Communication Simulator in Network Simulator-3

Kolář, Jan January 2015 (has links)
This thesis deals with the powerline communication focusing on the simulations of channel transfer functions. The introduction summarizes basic information about PLC followed by the analysis of the available PLC Software simulator (implemented in NS-3) and the analysis of implemented noises and interferences and its extensions. One chapter is devoted to possibilities of link capacity calculation. Within the thesis, various methods of calculation of primary parameters of transmission line were implemented and the simulator was compared with other freely available simulators. Subsequently, simulations were carried out focused on channel transfer functions in different topologies, on the impedance changes of branch, on the lengths of branch, and changes in the direct path between communicating nodes.
252

Návrh modelu pohybu pro nano-zařízení v simulačním prostředí NS-3 / Design of Mobility Model for Nano-Devices in NS-3 Simulation Environment

Miklica, Jan January 2014 (has links)
This thesis focuses on the description of nanocommunication networks, models for wireless communication networks and the description of motion in nanocommunication networks. The practical part describes the settings of the simulation scenarios for the definition of Brownian motion. Description is made for the simulation software NS-3 and N3Sim. In this thesis, the measured results of the simulations are summarized in tables and graphs. From the measured results the regression analysis is prepared. General summary of the results is provided at the end of thise thesis.
253

Simulovaná rozhraní testovací stanice avioniky / Simulated interfeace of test bench

Gabriel, Petr January 2014 (has links)
This thesis describes the design of solution for remote management and control of Honeywell Primus EPIC avionics test bench. The thesis also describes avionics, test bench, specifications and data transfer via RS-422 bus and ARINC 429.
254

Zvýšení přesnosti a robustnosti bezdrátových lokalizačních technik / Optimization of Wireless Localization Technigues

Tománek, Daniel January 2015 (has links)
The main theme of this thesis are problems of locating of wireless units in localization systems represented by wireless sensor networks. The thesis describes principle of trilateration and Levenberg-Marquardt algorithm. The main theme of this thesis is simulation of behavior of localisation systems and possible optimization of localization.
255

Řídicí jednotka pro malé DC motory s univerzálním softwarovým rozhraním / Control units for small DC motors with universal software interface

Hlouš, Jaroslav January 2008 (has links)
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.
256

Využití „Open Dynamics Engine“ pro modelování mobilních robotů / Utilisations of the “Open Dynamics Engine” for modelling of mobile robots

Kovář, Jiří January 2008 (has links)
This diploma thesis deals with the problems of virtual physical modelling of mobile robots for the needs of their real-time control. To create a virtual physical world, an open-source project OPEN DYNAMICS ENGINE (ODE) was used, the results were displayed facilitating DirectX graphical interface. Simulated systems in ODE were written in C# on Microsoft.NET platform. The properites and qualities in ODE were verified by simulation in several types of simple systems and on a simplified robot model "Kracmera I.". Subsequently, the usability of ODE for its control was being verified.
257

Aplikace diskrétní simulace pro koncepční plánování v hromadné výrobě automobilů / Application of discrete simulation in planning of large-scale car production

Klimeš, Roman January 2008 (has links)
This thesis deals with questions of creating of the universal simulation model of new planning production in the company Škoda Auto a.s., with which will be possible to check planning of future concepts. The model of manufacture will be used for connection of partial operations (body shop – paint shop – assembly line), where individual input parameters will be defined in the program Excel with a following possibility of automatic parameterization of the simulation model. According to experiments of the simulation will be possible realized a detailed analysis of results of the simulation. The model will be created in the simulation system SimPro, which belongs to a group of programs with the discrete event simulation.
258

Posouzení tepelné pohody v nízkoenergetickém rodinném domku s teplovzdušným vytápěním / Assessment of thermal comfort in a low-energy family house with warm-air heating

Kos, Jan January 2008 (has links)
The task of this master´s thesis is an evaluation of warm-air heating system in a low energy family house from the viewpoint of thermal comfort during winter season. The CFD simulation using CCM+ code was used for this purpose. The environment parameters in the central living room were evaluated for two variants – with underfloor heating and without it. The thermal comfort was evaluated using indices according ČSN EN ISO 7730 standard.
259

Matematické modelování mechanických systémů vozidel / Mathematical modeling of mechanical systems of vehicles

Zháňal, Lubor January 2008 (has links)
This thesis deals with design and implementation of the computing system, which would allow interactive simulation of kinematics and dynamics of vehicle mechanical systems or general mechanisms with the help of modern computer technology. In the thesis is described a basic working principle, optimization of numerical simulation parameters, as well as the implementation itself in the form of functional application and its key parts. Described are also possibilities for the use of virtual reality devices in conjunction with visualization of simulation process. Final comparative tests have confirmed the functionality and high performance of the created system.
260

Numerická simulace plnění a tuhnutí odlitku / Numerical simulation of mold filling and casting solidification

Kolda, Vlastimil January 2008 (has links)
The object of this diploma thesis is to analyze, persuant to numerical simulation of current technology of production aluminous casting roller-reck V9X, causes of the rise of cold lap and laminations defects. Consequently, to work up a project of variant solution of the shape of casting so, as to come to elimination mentioned defects. This variant solving will be tested with numerical simulation as well. Fruitfulness of these designed changes will be verified by testing molten of the casting. In terms of solve the problem the simulation of cycling of the mold and subsequently the filling of the casting will be effected. During the analyse of filling of the die the first phase of filling will be effected too.It means the movement of the piston throught the chambre. Simulation of solidification of the casting wont be effected because of the type of the defect.

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