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The impact of tire inflation on driving performance of a passenger vehicle
Pelán, Radim ; Bradáč, Albert (referee) ; Panáček, Vladimír (advisor)
The key goal of the following diploma thesis is to evaluate influence of the air pressure in the car tires on the driving dynamic, stability and comfort. The first part is dedicated to the theory of the driving dynamic, stability, tire parameters and tire inflation. Next practical part is focused on the drivers’ knowledge about the correct tire inflation and follows with the measurements and evaluation of the influence of the tire inflation on the driving characteristics, riding comfort and its comparison. These influences are summarized and followed up by the recommendations for the drivers and also the expert activities.
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Impact of Load Placing on the Driving Safety of Lorries
Novotný, Michal ; Krepl, Miloslav (referee) ; Bradáč, Albert (advisor)
The objection of this dissertation is to examine effects of stowed cargo on safety driving of a vehicle. Based on general experience of weighing trucks and monitoring of cargo fixture, my attempt was to summarize related legislative conditions of the operation of trucks in terms of payload, weighing and stowing of cargo. In the first part I worked on consistent methodology of stowing and fastening of cargo on trucks. I've included various methods of loading cargo and different ways of fastening and their calculations. The main body of the second part is a practical methodology of inspectional weighing of trucks on the road. In this section I took into account the current method and procedure of inspectional weighing and measuring of trucks. During my trial weighing of different types of trucks I proved that the key factor for safe seating and lashing of load on a vehicle is determining center of gravity of the vehicle. I solve this problem in detail in the last part of my work.
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Providing measured documentation of existing structural and technical conditions of a house in Hodonín
Kadlčík, Radek ; Bradáč, Albert (referee) ; Šmahel, Milan (advisor)
The diploma thesis deals with solving passportization of the existing structural and technical conditions and the proposed modifications family house in Hodonin. The project includes theoretical part describing the defect of brick constructions and other related topics. Next explaining the problems of the building passportization, processing passport current state of the house in Hodonín with the marking of construction defects and failures. Followed by a proposal to repair these defects and failures, increased structural and technical standards. Preparation of a proposal modernization of the building. Compilation itemized budget for individual defects and failures.
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Evaluation of specific factors in the valuation of agricultural land in conditions of the Czech republic
Hrubanová, Michaela ; Mikš, Lubomír (referee) ; Weigel, Lubomír (referee) ; Bradáč, Albert (advisor)
This dissertation is focused on the identification and evaluation of specific factors affecting the price of agricultural land. It should be mentioned that the market for agricultural land, especially arable land and permanent grasslands, is not fully developed in the Czech Republic and this area is not fully explored. The thesis describes the factors on the basis of which the investor decides when buying these plots. The data needed for this work have been obtained from professional literature, real estate servers, two polls, actual sales, etc. In the conclusion of this thesis all findings are summarized and evaluated. It includes the development of prices in the years 2014 – 2016 based on sales actually realized in the Olomouc Region, Moravian – Silesian Region, South Moravian Region and Vysočina Region. The outcome of the thesis is a proposal of an expert standard. It is necessary to realize that, above all, agricultural land is a specific commodity, as it is unreproducible, indivisible and its offer is limited.
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Influence of unsecured load on vehicle driving stability
Černý, Dominik ; Bradáč, Albert (referee) ; Bilík, Martin (advisor)
The diploma thesis is focused on the influence of a unsecured loads on the stability of selected vehicles. The thesis evaluates the behavior of vehicles during evasive maneuver under the influence of such a load. The theoretically part deals with all characteristics that can be influenced by the load. The practical part includes the measurement procedure, analysis, comparison of results and the overall evaluation of the unsecured load on the stability of the vehicle.
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Selected issue of electric personal means of transport movement
Konečný, Dalibor ; Stáňa, Ivo (referee) ; Bradáč, Albert (advisor)
Diploma thesis The selected issue of electric personal means of transport movement is divided into three main parts. The theoretical part deals with the description of electric bicycles, electric scooters and electric skateboards. Furthermore, legislation, tuning and issues related to these means of transport. The second part is devoted to the current state of knowledge in this area. The last part is devoted to practical measurement, namely braking, acceleration, acceleration into curves, going through curves, transverse movement and deflection when looking back. There were 10 e-scooters with 9 different riders and 6 e-bikes with 12 different riders. At the end of the work, an overall evaluation is made.
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Selected Issues of Motorcyclist's Behavior
Sedláček, Jan ; Bradáč, Albert (referee) ; Semela, Marek (advisor)
This thesis focuses on the braking systems of modern motorcycles. It describes the design details mainly concerning braking systems, ABS, semi-active chassis, but also the MSC stability control system. The experimental part deals with the measurement, analysis of the braking decelerations of motorcycles and evaluation, among others, whether the ABS system reduces the braking distance on dry road. Nine motorcycles were used to measure this issue. All models tested had ABS or the newer ABS system with built-in MSC stability control. Braking progress was analysed from initial speeds of 50 and 70 km/h to a straight-line stop with ABS applied and with ABS deactivated. The results were plotted graphically and can be used to provide information about the actions of the rider and the motorcycle itself. Braking distances, MFDD, initial speeds were calculated. In this study, the video recordings of braking are analyzed and compared with the measured data. The data can be useful for the analysis of single-track vehicle accidents.
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Selected issue of electric personal means of transport movement
Svoboda, Daniel ; Stáňa, Ivo (referee) ; Bradáč, Albert (advisor)
This thesis deals with the analysis of current electric conveyors, especially those with automatic levelling, their construction, and their differences from other electric conveyors. The thesis also includes the legal regulations for this issue in different countries. The measurements made consist of a comparison of different passenger carriers in various practical tests, which tell about the real use of these vehicles in real traffic.
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Analysis of methods for vehicle speed estimation from video recordings
Woletz, Jakub ; Bradáč, Albert (referee) ; Křižák, Michal (advisor)
The thesis deals with methods that deal with the evaluation of speed from CCTV footage, either from a static camera (e.g. security cameras) or from a dynamic camera (e.g. dashboard cameras). The entire thesis first discusses the various methods available, then shows their application to specific camera footage and evaluates their accuracy. The result of the work is an analysis of the applicability and accuracy of these methods for specific types of video footage.
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Selected Driving Manoeuvres of Motorcyclists
Kriegsmann, Luděk ; Bradáč, Albert (referee) ; Semela, Marek (advisor)
The entire diploma thesis is designed into two parts. The first part is focused on the theoretical description of the construction of motorcycles. In particular, the theoretical part deals with the description of the types of motorcycles, types of frames, types of suspension and the description of braking systems used on motorcycles. In the theoretical part, the main parameters of the motorcycle are also addressed, which affect the handling and stability of the motorcycle while riding. The last theoretical part deals with the technique of riding a motorcycle. The second part is focused directly on the execution of the experiment. The experiment consists of measuring five disciplines, namely measuring acceleration, measuring braking deceleration using brakes, measuring deceleration by the engine, measuring exit from an intersection and measuring lateral displacement. Eight motorcycles took part in the measurement. The main outputs from the measurements are time data, deceleration and lateral acceleration values.
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