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Computer modelling of the movement of agricultural machinery during field
FILIP, Martin
This dissertation deals with the problem of optimizing the number of hauling trailers and loaders in the handling, collection and transport of bales of fodder or straw from the land to the storage site in order to achieve the lowest possible consumption of human labour. The automated decision-making process allows the optimum number of removal trailers and loaders to be selected s that there is no unnecessary downtime for the handling equipment while waiting for the transport equipment or, conversely, no lost time for the removal trailers due to insufficient loader capacity. The basic function of the optimization program is to process a Google Maps image of a real plot of land, detect its boundaries and, on the basis of estimates of forage or straw yields, estimate the approximate distribution of predefined bale sizes and determine the centroids, i.e. the locations where the hauler should be positioned when loading.The centroid is also the point from which the shortest travel distances for the loader are obtained. The centroids are assigned successively to the packages with the lowest distance until the group is full. This is the condition where the number of bales in the group corresponds to the transport capacity of the conveyor. Another function of the optimization algorithm is to schedule the travel routes in the centroid and based on the input value of the average speed of the loader, the time required for the travel of this machine is calculated. To the total working time of the loader is added the time required for driving from the storage area of the machine to the plot, as well as the time required for driving from the point of entry to the working area to the centroid, and the driving time from the processed centroid to the other centroids, including the driving time from the harvested areas back to the place where the loader will be parked. In addition, the value of the time required to lift all bales in the centroids and place them on the conveyor and the downtime of the manipulator are added to the loader's travel time to obtain the loader's total time. The working time of the removal trains is calculated from the distance of the route (multiplied by the average speed of these machines) from the storage location of the machines to the centroid, the loading time and the time required to travel to the storage location of the bales, including the time required to remove the bales from the removal trains. The time of the loaders and the removal trains is evaluated simultaneously, in synchronisation, and it is calculated whether there are any lost times, which are added successively to the working times. The optimization program sequentially calculates the different variants for (n) loaders, (n) transfer sets, evaluates which variant consumes the least time and is therefore optimal in terms of the lowest time consumption.
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The effective coverage of the heat demand using solar system
Vítek, Lukáš ; Horká, Lucie (referee) ; Vyhlídalová, Karolína (advisor)
This master thesis aims to design the heating system and HDW preparation in an apartment building. The first variant deals with condensation gas boiler as the only energy source, while the second variant combines the gas boilers with the solar thermal system. The apartment building is located in Prag and has three above-ground floors and a basement. In the basement is the technical room. Convectors are being used for heat distribution. The theoretical part deals with the introduction to the solar thermal system.
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System for Precise Measurement of Electrical Length of Coaxial Cables
Podr, Michal ; Polívka,, Milan (referee) ; Šebesta, Jiří (advisor)
This thesis describes a study of the measuring methods determining the electrical length of coaxial cable without using a vector network analyzer. First, a general theory of management and its various parameters is briefly discussed. This section is focused more specifically on the coaxial cable and its parameters. The next part is graphically analyzed process considerations in the design of measurement methods and outlined the block structure of the system. The third section describes the working process, prototype testing of the bridge, its measurement and design of the measuring system. In the fourth part the software is described. In conclusion, the results of the work are discussed, accuracy of the measurement system, the obtained parameters chosen with regard to the principle of the measurement system and the overall evaluation of the applicability in practice.
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Intelligent Control of Traffic Lights
Skoták, Miloš ; Samek, Jan (referee) ; Malačka, Ondřej (advisor)
In this thesis is analyzed Multi-Agent system for intelligent control of traffic lights. For the simulation of a real situation was implemented a simulator of a traffic situation written in Java language, which is based on a cellular automata. In Multi-Agent system can be found not only communication between the agent and environment, but also communication among agents. To implement the rules was used extended AgentSpeak language model based on BSD with Jason interpreter. Experiments were done on a real road section in the city Brno.
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Vehicle Hydropneumatic Unit
Koudelka, Roman ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
This diploma thesis, following the bachelor's thesis, is devoted to the gas-liquid unit of a vehicle, as the central element of hydropneumatic suspension. The aim is to dimension and construct this component and integrate it together with other elements into a complex suspension system. Based on possible forms listed in the research section, regarding to current development trends, the form of the unit is chosen. The practical part begins with simulations comparing a hydropneumatic with a conventional suspension system. After solving this issue, it is possible to proceed to the dimensioning of the basic parameters of the unit and then to its construction, respecting the relevant strength calculations. The last step is to build a conceptual design of the whole hydropneumatic suspension system.
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Memory Subsystem Simulator
Holášek, Petr ; Janoušek, Vladimír (referee) ; Peringer, Petr (advisor)
This theses describes aspects of memory traces processing, its applications in simulation and development of modular memory subsystem simulator based on memory traces. The simulator also supports use for educational purposes thanks to built-in visualization which can be used to track address accesses in memory subsystem hierarchy.
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Link robots
Vidlák, Marek ; Kubela, Tomáš (referee) ; Simeonov, Simeon (advisor)
Master’s thesis deals with design the link robot and motion simulation. It is divided into four parts. In first part are briefly explained basic information of industrial robots and manipulators, their design and structure. Further it is listed some examples of design industrial robots and manipulators and principle of computation of kinematic chain. On beginning of the second part is performed analysis of configuration link robots, description of their designs and structures, examples of design link robots and their applications. In third part is selected option of design, created mathematical and kinematic model. Then it is designed and described construction of robot. The last section is devoted to simulation of robot’s kinematics, description of simulation softwares and their use for required results.
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Simulation of Physical Phenomena Using Cellular Automata
Martinek, Dominik ; Smrčka, Aleš (referee) ; Peringer, Petr (advisor)
This master's thesis deals with modelling and simulation of physical phenomena by cellular automata. The basic methods which model physical phenomena is enumerated and descibed in this thesis. One of the important part of this thesis is a set of demonstration models. Each model is focused on one selected area of physical phenomena. All models are described by transtition rules and the procedure of derivation of these rules is also presented here. There rules were used in implemented models. Another part of this thesis contains of a simulation application for these models. The real application had been implemented in accord with this design and it has been used to perform the simulation experiments with exemplary models. Results of the simulation experiments are discussed in conclusion of this thesis. One exemplary model had also been adapted for parallel processing. The performances on a computer with different count of working processors were measured and are also discussed in the conclusion of this thesis
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