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Controllers design for plants with large time constants
Omelka, Vlastimil ; Rojka, Aleš (referee) ; Davidová, Olga (advisor)
This bachelor thesis aims to present a design of convenient continuous action controllers for plants. A brief summary of methods of design mostly in use is listed in the work. Selected methods are presented with more detailed description and are applied on four particular systems with different time constants. Furthermore the calculated values are being processed using MATLAB - Simulink program. The final readings are evaluated and compared with respect to the quality and precision of the regulation.
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Numerical control of machine tools
Dlouhý, Rostislav ; Opl, Miroslav (referee) ; Blecha, Petr (advisor)
This thesis is focused on numerical control of machine tools. Control systems are shortly compared. There are three biggest manufacturers: Siemens, Fanuc and Heidenhain. Especially user benefits and opportunities of workshop programming are compared. The second part is focused on the choice of control system for the selected machine tool. I am applying the knowledge and the conclusions which I have reached in comparing different control systems. I chose two alternatives of the control system based from entered requests for the chosen machine tool.
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Control of heat sources orientated on the biomass combustion
Havlíček, Martin ; Chlápek, Petr (referee) ; Máša, Vítězslav (advisor)
The Bachelor thesis deals with the control of heat sources which are concerned on biomass combustion. The aim of this thesis was to present the properties of biomass as a fuel. It also describes the technology of medium power boilers and their comparison with other power categories. Above all, it evaluates the current control systems of biomass boilers with medium power and offers the list of Czech producers. The thesis also gives the brief information about the situation abroad.
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A problem of electric powered wheelchair
Filipec, Petr ; Sikora, Michal (referee) ; Švejda, Pavel (advisor)
This work deals with the research electric powered wheelchair and one's own project for its improvement. At the beginning a basic characterization of powered electric wheelchair is described. The work continues with a study of research control systems. Next, statistics are worked up from opinion poll. Instrument for optimalization engine power and battery capacity is created in terms of this information.
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Description of grinding machines
Macků, Martin ; Opl, Miroslav (referee) ; Blecha, Petr (advisor)
This bachelor´s thesis deals with the description of grinding machines. The goal of this paper is to describe the evolution of the grinding machines as well as the contemporary grinding machines. Further this paper analyses the construction of the machines and points at the possibilities of thein future improvement. This paper also lists the companies that produce the grinding machines and attempts to identify the main differences among thein products. The paper is finalized with the summary.
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Description of CNC lathe machines
Martínek, Lukáš ; Matějka, Petr (referee) ; Blecha, Petr (advisor)
My work is focused on description of CNC lathe machines. The aim is to describe CNC, its evolution, analyze the construction of the machine and show possibilities of development in the future. Furthermore to mention companies that produce this kind of machines and try to define main differences among machines. This work is divided into four main parts. The first one is the evolution, second is description of CNC machine and companies engaged in their production. At the end is evaluation of whole work.
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Analysis of system of subsidies provided by the State Agricultural Intervention Fund
Mrkvičková, Klára ; Ochrana, František (advisor) ; Peková, Jitka (referee)
The main goal of the study is to analyze the system of subsidies provided by the State Agricultural Intervention Fund (SAIF). Induced administrative costs associated with grant applications at the recipient's site and at the provider's site are examined. Also the control system was examined whether it ensures efficient and economical use of the resources provided. For the purpose of the study, the grant programs SAIF were divided into two groups - operational and capital nature, which were processed separately using questionnaires and average of the administrative costs on the applicant's site associated with the operational subsidies can be estimated as 1% of the amounts received. The percentage is indirectly proportional to the size of holding. The assesment of the administrative costs associated with the investment subsidies was not possible due to the high variability of supporting measures to express the same indicator. It would be necesssary to increase the data set. The administrative expenses of SAIF for reallocatig the resources are 3,5%. For control needs of direct payments there is a system Cross complience, which indirectly ensures efficient and economical management of resources obtained. Investment projects are administrated under direct supervison of SAIF's authority checks.
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