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Chassis Torsional Stiffness Measurement Stand
Kudr, Jan ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
Those theses describe torsional stiffness car chassis. Here is write short knowledge about various type of measuring, explain impact torsional stiffness on car handling. Target of this theses is work out structural proposal of device for measuring torsional stiffness car chassis, suitable method of measuring, calculate measurement mistake and provisional cost calculation.
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Růstové projevy javoru klenu (Acer pseudoplatanus) a javoru mléče (Acer platanoides) ve vegetačních stupních v oblasti LHC Loučná n/Desnou (přírodní lesní oblast Hrubý Jeseník)
Rozsíval, Jan
The content of my thesis summarizes the existing knowledge about the growth manifestations of sycamore maple (Acer pseudoplatanus L.) and norway maple (Acer platanoides L.). In the area of Loučná nad Desnou, it maps growth manifestations, habitat and dendrometric characteristics in the range of the 3rd – 8th forest vegetation tiers. Norway maple in the spectrum of the 3rd, 4th and 6th forest vegetation tier. Based on the field survey, an assessment of the health condition and the limits of occurrence of trees of interest was prepared at the level of the spectrum of represented forest vegetation tiers. The analysis of the data shows a wide representation of sycamore maple (Acer pseudoplatanus L.) in the interval of 3rd – 8th FVT, there is production and ecological optimum of the mentioned tree species is in the range of 4th – 6th FVT. At the sites of these FVT reaches the highest heights and volume production. The representation of norway maple (Acer platanoides L.) was demonstrated in the 3rd, 4th and 6th FVT, but it is minimally represented in the examined area in compare with the first tree species. From the point of view of the influence of abiotic and biotic factors, it was found that the examined tree species are affected by these factors only sporadically. The thesis also includes a draft framework directive for management for nutrient habitats at higher altitudes and an analysis of prices on the market for sycamore maple (Acer pseudoplatanus L.) in Europe.
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Vehicle Axles with Electric Drive
Hlaváč, Petr ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
The aim of the bachelor’s thesis is to compile an overview of the known solution for front and rear axles and characterizes development trends. The first part describes existing suspension, comparison, theoretical description of individual axle components, methods of attachment to the car body and their advantages or disadvantages. In the following section attention is focused to the drivetrain. Electric motors, by their compactness, change the established drive layout typical for internal combustion engine cars. The final part is dedicated to the comparison of the vehicles with electric drive and similar cars with internal combustion engine. Based on he gained knowledge the future development of electric vehicle axles is outlined.
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Possibilities of simulation modeling of traffic accidents with reduced visibility
Rozsíval, Jan ; Motl, Jakub (referee) ; Bradáč, Albert (advisor)
The diploma thesis deals with the possibilities of simulation modeling with reduced visibility in the Virtual CRASH program, which as the only available programs allows work both with the help of mathematical models to simulate vehicle movement and change parameters to simulate reduced visibility, lighting, etc. The theoretical part contains a description of photometric quantities, deals with the human eye and its ability to see under reduced visibility, a description of the luxmeter meter and luminance analyzers. Here are four main reasons for reduced visibility and their description. It contains a sample of the most used programs used to deal with traffic accidents. The four types of headlights most commonly used in today's vehicles are listed and described. In the experimental part, two measurements were performed. The first measurement to obtain input values to obtain a black and white texture determining the shape of the light rays emanating from the vehicle headlights. The second experiment to obtain the contrasts of the white box, black box and pedestrian for subsequent comparison with the output of the Virtual CRASH program.
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Vehicle Passive Safety Systems
Jelínek, Adam ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor’s thesis of research nature deals with detailed description of passive safety features in modern cars and with characterization of these features in relation to electric and autonomous cars. Detailed structural and material description of car’s crumple zones and safety cage with description of car’s restraint systems is supplemented with historic background on development of these features. Final part of thesis gives reader an idea of application and necessary changes of these features when used on electric or autonomous cars.
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Design of Vehicle Steering
Barančoková, Zoja ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
This bachelor thesis primarily deals with the design of vehicle steering, as it forms one of the most important elements of the overall vehicle. The steering must meet certain safety requirements and nowadays, the driver’s driving comfort is already seen as an essential part of it. This work contains the basic kinematic settings and a summary of the individual constructional components together with their functions. To ensure the correct control of the vehicle on the road, the correct setting of the dynamic part of the steering is also necessary. Bearing in mind the electronic equipment of the vehicle that made its way into spotlight, the thesis also explains principles of the systems operations that every modern vehicle already contains. Finally, the types of gearboxes and power steering which this year’s passenger and commercial vehicles are equipped with are summarized. Based on the acquired knowledge, a prediction of the future development of the vehicle driving is presented.
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Motorcycle rotary engine
Novotný, Petr ; Rozsíval, Jan (referee) ; Zháňal, Lubor (advisor)
Diploma thesis is focused on conceptual design of Wankel rotary engine with performance between 30-60 kW. Performance of designed engine is determined to 35 kW and volume of one chamber amounts to 245,58 cm^3. In this thesis are step by step calculated geometrical properties of each design group which are afterwards put into 3D data. There is also solved cooling system of designed engine and design of geometrical and characteristic properties of parts of cooling system. Last but, not least there is solved placement of designed engine into frame of motorcycle. As suitable motorcycle has been chosen Honda CBR125R because it has very advantageous layout of frame.
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Aerodynamic design of heavy commercial vehicles
Šuľak, Andrej ; Rozsíval, Jan (referee) ; Fojtášek, Jan (advisor)
This bachelor's thesis deals with the currently available aerodynamic drag reduction devices for articulated and drawbar trucks. The main goal is to reveal the given topic to the reader, beginning with some basic information about aerodynamics and then explaining how these drag reduction devices work. They often provide additional benefits apart from improving aerodynamic efficiency.
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Design of Device for Tyre Parameters Measurement
Pacut, Patrik ; Rozsíval, Jan (referee) ; Hejtmánek, Petr (advisor)
The aim of this thesis is a method selection and design of measuring device for experimental identification of directional tire characteristics for passenger cars. The first part analyse directional characteristic and method of measurement. The next part focuses on the design of the measuring trailer and selecting measuring equipment with description.
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