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Computational modelling of aerodynamic noise caused by the car’s side mirror
Vobejda, Radek ; Hájek, Petr (referee) ; Švancara, Pavel (advisor)
The master’sthesis deals with numerical modelling of aerodynamic noisewhich arisesinside of the carcabin. In the first part ofthe thesis simplified model of geometry of the car and of the inside acoustic pressure arecreated. After that numerical analysis of created models of geometry are doneandvarious models of turbulenceare discussed. The results of these CFD simulationswhere then used for changing the model of geometry of the wing mirror. Outputs of these simulations were used for solving the numerical analysis of noise in the car cabin.
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Detection and Classification of Road Users in Aerial Imagery Based on Deep Neural Networks
Hlavoň, David ; Hradiš, Michal (referee) ; Rozman, Jaroslav (advisor)
This master's thesis deals with a vehicle detector based on the convolutional neural network and scene captured by drone. Dataset is described at the beginning, because the main aim of this thesis is to create practicly usable detector. Architectures of the forward neural networks which detector was created from are described in the next chapter. Techniques for building a detector based on the naive methods and current the most successful meta architectures follow the neural network architectures. An implementation of the detector is described in the second part of this thesis. The final detector was built on meta architecture Faster R-CNN and PVA neural network on which the detector achieved score over 90 % and 45 full HD frames per seconds.
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Options for Buying a New Car
Moskalenko, Vladislav ; Hrnčíř, Václav (referee) ; Svirák, Pavel (advisor)
The diploma thesis focuses on finding the total cost to purchase a car. It focuses on the possibility of making a car for business with a view to analyzing the options that are offered to potential buyers of financial companies. The work is based on documents obtained from the leasing company and focuses primarily on two types of vehicle purchase, the form of financial leasing and credit. For the final evaluation of tenders come out of the total amount of funds released and their time into account. It therefore chooses the optimal variant of the calculated present value of any expenses incurred.
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AUTOCENTRUM VW GROUP MIKULOV
Běhůnek, Ondřej ; Hudeček, Vladimír (referee) ; Dýr, Petr (advisor) ; Kacálek, Petr (advisor)
The subject of the bachelor's thesis is the elaboration of project for the building permit and for the construction of the VW Car Centre in Mikulov. The documentation follows the study maked during the summer semester of the academic year 2019/2020, within the AG033. The aim of the study was to develop an available, functional, and architectural solution. The bachelor's thesis elaborates this study in detail. The building site is in South Moravia, on the northwestern edge of Mikulov in the former collective farm. The building is connected to the local road by Jiráskova Street, two entrances, connected by an asphalt road around the building. Around road, there are parking areas for visitors and employees, as well as parking areas for serviced vehicles and vehicles intended for sale. The building is divided into several functional units, especially the sale of new cars, with administrative, sale of spare parts with a handy warehouse and authorized service, with facilities for employees and a spare parts warehouse. These units are reflected in structure, consisting of three blocks, different in height, adapted to the requirements for traffic height. In the first, one-floor block, there is a car shop, in the middle, two-floor block, storage and sale of spare parts on the ground floor, the administrative on the second floor. In the third block is the service. The parts are interconnected and thus form one continuous object. From an architectural point of view, the building is based on the surrounding industrial buildings and is flattened with a titanium-zinc overhanging perforated shell. The sun exposure of the building is ensured by curtain walls on the sides of the building, on the second floor by windows. Furthermore, the building is illuminated by skylights. In the interior of the sales and administrative part, there is a dominant steel console staircase, connecting these two units. The building is designed to the principles of barrier-free use.
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Physical Simulation in Graphics Scene
Javorka, Marián ; Herout, Adam (referee) ; Pečiva, Jan (advisor)
This master's thesis deals with physical simulation of cars. Program is implemented in C++ using OpenSceneGraph and Bullet libraries, which are shortly introduced. The application is implemented as simple racing game for one or two players. Using a simple menu, the user can select a car and the weather, which dramatically affects the handling characteristics of vehicles. Setting weather to random is one of the options leading to a dynamic weather changes during the game. The application takes into account collisions among cars and collisions with the terrain and bars on a racing circuit.
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Simulation of vehicle dynamics using V-REP software
Borek, Dušan ; Houfek, Lubomír (referee) ; Grepl, Robert (advisor)
This theasis deals with modeling dynamics and visualization of experimental vehicle CAR4 in software V-REP. The first part shows introduction with V-REP and its possibilities for usage in simulations. The second part presents modelling of CAR4 vehicle and its control by using software V-REP and Matlab. In last part are models of vehicle tested in simulation
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Visualisation of Path-Planning
Vozák, Petr ; Orság, Filip (referee) ; Rozman, Jaroslav (advisor)
This thesis deals with sampling-based algorithms for nonholonomic (mainly car robot) and flexible robot path planning. Theoretical principles of probabilistic path finding and its implementation detail are discussed here. Java applets for visualization of algorithms and web pages are include on the CD.
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Internet Used-Cars Shop
Horák, Zdeněk ; Jurka, Pavel (referee) ; Skřivánek, Roman (advisor)
This bachelor's thesis contains the analysis, the design and the information system implementation of the Internet used-cars shop. The system files predominantly information about the cars which the used-cars shop offers for sale. The system saves basic data about each car, the data about the former keeper, general information about the car producer and about the car price changes. Two kinds of users can log into the system with a specific password. The customer of the used-cars shop who is allowed to view the catalogue of offered cars and make a reservation. The second is the system administrator who can edit saved data. The used-cars shop forum is also available.
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Assesment of the Thermal Environment in Vehicular Cabins
Fojtlín, Miloš ; Khoury, Roch El (referee) ; Havenith, George (referee) ; Jícha, Miroslav (advisor)
Ľudia žijúci vo vyspelých krajinách trávia väčšinu svojho života vo vnútorných prostrediach budov alebo dopravných prostriedkov. Z tohto dôvodu, záujem o výskum kvality vnútorných prostredím rastie, pričom hlavný dôraz je kladený na oblasti výskumu ľudského zdravia, produktivity a komfortu. Jedným z faktorov ovplyvňujúci kvalitu prostredí je ich tepelný aspekt, ktorý je najčastejšie popísaný teplotou vzduchu, radiačnou teplotou, vlhkosťou vzduchu a rýchlosťou prúdenia vzdu-chu. Zatiaľ čo tieto parametre je možné riadiť systémom pre vykurovanie, vetranie a klimatizáciu nezávisle na počasí, takéto zariadenia sa podieľajú na vysokej spotrebe energie a značnej uhlíkovej stope. V prostediach kabín áut a dopravných prostriedkov je riadenie parametrov tepelného prostredia komplikované z dôvodu ich asymetrickej a časovo premenlivej povahy. Táto situácia je obzvlášť kritická vo vozidlách na elektrický pohon s vlastnou batériou, kde je energia na úpravu vnútornej mikroklímy čerpaná na úkor dojazdu vozidla. Pre uvedené dôvody sa hľadajú nové, en-ergeticky účinnejšie spôsoby pre úpravu tepelných prostredí a zabezpečenia tepelného komfortu. Jedným z potenciálnych riešení sú zariadenia dodávajúce človeku teplo alebo chlad lokálne, ako napríklad vyhrievané a vetrané sedadlá a sálavé panely. Vzhľadom na to, že experimentálny výskum vnútorných prostredí je náročný s ohľadom na čas a potrebné vybavenie, trendy výskumu vplyvov takýchto zariadení na človeka smerujú k optimalizačným úlohám vo virtuálnych prostrediach pomocou modelov ľudksej termofyziológie a tepelného pocitu/komfortu. Avšak pre spoľahlivé výsledky modelovania sú potrebné presné vstupné parametre definujúce prostredie, odev, vplyv povrchov v kontakte s človekom (napríklad sedadlá) a pôsobenie systémov na lokálnu úpravu mikroklímy. Cieľom tejto dizertačnej práce je vytvorenie metodológie na hodnotenie tepelných prostredí v kabínach automobilov s ohľadom na pozíciu v sede a využitím technológii na lokálnu úpravu tepelných prostredí. Jedným z požiadavkov na takúto metodológiu je jej aplikovateľnosť vo virtuálnych ale aj reálnych prostrediach. V prípade hodnotenia reálnych prostredí, cieľom je vytvorenie demonštrátora, ktorý by bol využiteľný ako spätná väzba pre riadenie systémov pre úpravu mikroklímy na základe požadovaného tepeleného pocitu. Validita uvedenej metodológie bola demonštrovaná v typických podmienkach kabín automobilov (5–41 °C) a poznatky z tejto práce sú prenesiteľné do širokého spektra inžinierkych aplikácii. V oblasti osobnej dopravy a pracovných prostredí s vyššou tepelnou záťažou je táto metóda užitočná pre identifikáciu možných zdrojov diskomfortu. Navyše je táto metóda vhodná i pre rýchlo rastúci segment elektrických vozidiel, kde je možné sledovať tok energie potrebnej na dosiahnutie určitej úrovne komfortu a riešenie optimalizačných úloh za účelom úspory energie a predĺženie dojazdu. Obdobné aplikácie možno nájsť i v budovách a prostrediach s podobnými charakteristikami.
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