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Specifics of accidents Agricultural Technology
Tamáši, Adam ; Polcar, Adam (referee) ; Vémola, Aleš (advisor)
Master’s thesis focuses on the specifics of agricultural machinery accidents. The introductory part defines agricultural machines and its basic characteristics. It also analyzes specific technical regulations that govern the use of these machines in traffic. The experimental part then describes the methodology and interprets the results of conducted experimental measurements on driving dynamics of a tractor with carried accessory. These measurements consist of a break test in straight line, evasion manoeuvre and acceleration while turning left. The focus was given to not just the acceleration values, but also to the influence of the carried accessory, the load on the front axle or the tire pressure. The analysis of the findings made compares the results with the driving dynamics of ordinary passenger cars and provides a detail dissection of the most frequent causes of agricultural machinery accidents.
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Identification and evaluation of customer preferences for selected product
Tůma, Milan ; Hurta, Jakub (referee) ; Chlebovský, Vít (advisor)
Finding customer preferences when deciding about buying a tractor in the 201-300 horsepower category. Attributes will be gained through questionnaire survey, and will be used in the QFD method, where there will also be comparison of major competitors in a given market segment. The evaluation of tractors will also include the voice of the customer, gained from KANO model. KANO model will be second survey that will be used in this thesis. The conclusion is to build an ideal tractor structure that matches the customer's wishes.
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Simple agrocontroller
Pelikán, Michal ; Friedl, Martin (referee) ; Steinbauer, Miloslav (advisor)
Simple agrocontroller is a realization of control computer of spray machine in agriculture technique. Introduction describes the types of individual sprayers and their main differences. Hydraulic scheme displays the layout of regulators, ventils, hosepipes etc. Chapter Requirements defines needed functions and variables. Next chapter explains the structure of the layout of agrocontroller´s individual parts. Also defines required functions and features of these parts with real circuits and components and methods of gaining required values. Practical part show how printed circuits boards look like and what are features and properities of agrocontroller.
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Testing of piston combustion engines
Humpolíček, František ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
The aim of this thesis is to compile knowledge and provide a comprehensive overview of the testing of piston combustion engines, dynamometers and types of testing for engines designed for agricultural machinery. Types of various tests are described, dynamometers are categorized and the characteristics of individual components are studied. Different types of tests are also categorized and their principles summarized. Based upon these findings, the most suitable configurations are determined for a borrowed dynamometer to measure agricultural machinery. The borrowed dynamometer was used to conduct practical measurements of the external speed characteristics of combustion engines in agricultural machinery. It was experimentally determined that the duration of measurement is limited by the reduced efficiency of eddy current brakes due to increasing rotor temperature.
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Design of Concept of a Universal Agricultural Tractor
Baka, Michal ; Buganská, Tamara (referee) ; Křenek, Ladislav (advisor)
This bachelor's thesis is focused on the innovation of the Zetor Forterra agricultural tractor design. The thesis deals with market analysis, researching main market rivals, technical parameters and describes the possibilities of solution. The result of the work are improvements of the product that would make this tractor better in both ways, in functional and ergonomic terms.
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On-Line Agriculture Technology Catalogue
Milička, Martin ; Očenášek, Pavel (referee) ; Burget, Radek (advisor)
The main goal of this project was to create an online agriculture technology catalogue. This catalogue allows managing machines in hierarchically organized categories. The categories allow grouping machines with similar parametres and purpose. Each machine stored in the catalogue can be assigned an arbitrary number of parameters with values. Another advantage of the catalogue is the possibility of placing selected machines on a parking place with the possibility of comparing their parameters. The system of administration has been designed at a modular principle.
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High pressure hydraulics in agricultural machinery
Pavlík, Václav ; Kárník, Jan (referee) ; Soukup, Lubomír (advisor)
This bachelor thesis provides an overview of the most used ways of converting kinetic energy into pressure energy and the other way around by using hydrostatic converters. It is focused on the issue of high-pressure hydraulic mechanisms in agricultural machinery. In the next section I focused on getting an overview of the function of sophisticated hydraulic systems in current tractors and calculation of heat losses of lifting weight by front three-point hitch. For solving was used Bernoulli equation for real flow in pipes.
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