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The problem of energy-efficient train control
Berkessa, Zewude Alemayehu ; Kisela, Tomáš (referee) ; Čermák, Jan (advisor)
The Diploma thesis deals with the problem of energy-efficient train control. It presents the basic survey of mathematical models used in the problem of energy-efficient train control, analysis of optimal driving regimes, determining optimal switching times between optimal driving regimes and timetabling of the train. The mathematical formulation of the problem is done using Newton's second law of motion and other known physical laws. To analyse optimal driving regimes and determine the switching times between optimal driving regimes, we apply tools of optimal control theory, particularly Pontryagin's Maximum Principle. The timetabling of the train is discussed from the numerical solution of the settled non-linear programming problem.
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Construction of the Optimal Control Strategy for an Electric-Powered Train
Pokorný, Pavel ; Šeda, Miloš (referee) ; Kuben, Jaromír (referee) ; Čermák, Jan (advisor)
Předložená disertační práce se zabývá popisem charakteru optimální strategie řízení pro elektrický vlak a výpočtem přepínacích okamžiků mezi jednotlivými optimálními jízdními režimy pro standardní typy odporové funkce. S využitím Pontrjaginova principu a souvisejících nástrojů teorie optimálního řízení odvodíme optimální strategii řízení a rovnice pro výpočet přepínacích okamžiků včetně odpovídajících rychlostních profilů. Kromě základního tvaru úlohy o energeticky optimální jízdě vlaku budeme uvažovat i její modifikace zahrnující globální rychlostní omezení, sklon trati i časově-energeticky optimální řízení vlaku. Navíc uvedeme i analýzu řešení s využitím teorie nelineární parametrické optimalizace. Důraz je kladen na exaktní tvar řešení s minimálním využitím numerických metod.
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The possibilities electricity savings of refrigeration and cooling equipment according to the distribution rate - the cold storage
Pálka, Marek ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
This bachelor´s thesis is focused on the possibilities of electricity savings of the freezing equipment, which would work only in low distribution rate and it would be disconnected from the power source in the high distribution rate. In this work, a total research in the field of refrigeration and cooling equipment, both technological circuits, as well as the principles of temperature regulation and food storage process is made. Another part of the work is focused on freezer testing standards and regulations. Much of the work is devoted to the experimental measurements, in which different types of rates on the given freezer equipment and with them associated the possibilities savings relative to other rates are measured. Another objective of the experimental measurement is to find out the temperature behaviour in the various parts of a freezing apparatus according to the switching time of the rates. There are overall experimental measurements evaluated and the possibility of electricity savings in direct reliance to the processes ongoing in the food during long term storage in the freezer in the unstable storage temperature In the conclusion of the work.
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The problem of energy-efficient train control
Berkessa, Zewude Alemayehu ; Kisela, Tomáš (referee) ; Čermák, Jan (advisor)
The Diploma thesis deals with the problem of energy-efficient train control. It presents the basic survey of mathematical models used in the problem of energy-efficient train control, analysis of optimal driving regimes, determining optimal switching times between optimal driving regimes and timetabling of the train. The mathematical formulation of the problem is done using Newton's second law of motion and other known physical laws. To analyse optimal driving regimes and determine the switching times between optimal driving regimes, we apply tools of optimal control theory, particularly Pontryagin's Maximum Principle. The timetabling of the train is discussed from the numerical solution of the settled non-linear programming problem.
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The possibilities electricity savings of refrigeration and cooling equipment according to the distribution rate - the cold storage
Pálka, Marek ; Šlezingr, Jan (referee) ; Macháček, Jan (advisor)
This bachelor´s thesis is focused on the possibilities of electricity savings of the freezing equipment, which would work only in low distribution rate and it would be disconnected from the power source in the high distribution rate. In this work, a total research in the field of refrigeration and cooling equipment, both technological circuits, as well as the principles of temperature regulation and food storage process is made. Another part of the work is focused on freezer testing standards and regulations. Much of the work is devoted to the experimental measurements, in which different types of rates on the given freezer equipment and with them associated the possibilities savings relative to other rates are measured. Another objective of the experimental measurement is to find out the temperature behaviour in the various parts of a freezing apparatus according to the switching time of the rates. There are overall experimental measurements evaluated and the possibility of electricity savings in direct reliance to the processes ongoing in the food during long term storage in the freezer in the unstable storage temperature In the conclusion of the work.
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Construction of the Optimal Control Strategy for an Electric-Powered Train
Pokorný, Pavel ; Šeda, Miloš (referee) ; Kuben, Jaromír (referee) ; Čermák, Jan (advisor)
Předložená disertační práce se zabývá popisem charakteru optimální strategie řízení pro elektrický vlak a výpočtem přepínacích okamžiků mezi jednotlivými optimálními jízdními režimy pro standardní typy odporové funkce. S využitím Pontrjaginova principu a souvisejících nástrojů teorie optimálního řízení odvodíme optimální strategii řízení a rovnice pro výpočet přepínacích okamžiků včetně odpovídajících rychlostních profilů. Kromě základního tvaru úlohy o energeticky optimální jízdě vlaku budeme uvažovat i její modifikace zahrnující globální rychlostní omezení, sklon trati i časově-energeticky optimální řízení vlaku. Navíc uvedeme i analýzu řešení s využitím teorie nelineární parametrické optimalizace. Důraz je kladen na exaktní tvar řešení s minimálním využitím numerických metod.
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