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Dynamic simulations of linear displacement system of CNC milling machine
Gregor, Jiří ; Tůma, Jiří (referee) ; Klíč, Daniel (advisor)
This thesis deals with dynamic simulations of a linear feed system of a CNC milling machine in Adams View. Dynamic simulations enable better and faster decision making when designing new machines than prototyping. The aim of this work is to compare the torque waveforms on ball screws at working feed and at quick feed. The next task is to measure the forces acting on the load body. The values were obtained by simulation in Adams View and measurement on a CNC milling machine MCV Quick 754. The results were exported to Matlab. The resulting torque waveforms were compared, where they are relatively identical during working feed, with large differences during rapid feed.
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SIMULATION OF ENERGY PERFORMANCE AND REAL OPERATION OF BUILDINGS
Šteffek, Libor ; Ingeli,, Rastislav (referee) ; Hirš, Jiří (referee) ; Ostrý, Milan (advisor)
This dissertation thesis primarily focuses on the experimental measurement of energy consumption of a given energy-passive family house as well as theoretical research in the field of energy calculations using computer simulations. The results of quasi-stationary and dynamic simulations, with varying computational and real-time climate data, are compared with experimental measurements. Using the dynamic calculation model, which was validated by actually measured data, the relationship between architectural design and the energy performance of the building was analyzed. The influence of selected different operating modes for heat consumption on heating, cooling, ventilation, and interior overheating is observed. The result of the mutual interaction of several input parameters of variant solutions provides the basis for optimization of the whole design.
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Study of hygrotherma behavior of thermal insulating materials based on natural fibers
Kosturová, Andrea ; Peterková, Jitka (referee) ; Zach, Jiří (advisor)
The content of this work is to describe the transport of heat and moisture in thermal insulation materials based on natural fibers. The disadvantage in using these materials when incorporated into the construction is their low resistance to moisture. Therefore this work is further interested on possible modifications of natural fibers, which could correct it. Implemented literature research is approaching trends in the usage of dynamic simulations of heat and moisture transfer through material. Based on the findings from previous works on the VUT and theoretical part there were applied various kinds of impregnating preparations on a sample of insulation from hemp and the evaluation of their effect on the properties of the insulator.
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SIMULATION OF ENERGY PERFORMANCE AND REAL OPERATION OF BUILDINGS
Šteffek, Libor ; Ingeli,, Rastislav (referee) ; Hirš, Jiří (referee) ; Ostrý, Milan (advisor)
This dissertation thesis primarily focuses on the experimental measurement of energy consumption of a given energy-passive family house as well as theoretical research in the field of energy calculations using computer simulations. The results of quasi-stationary and dynamic simulations, with varying computational and real-time climate data, are compared with experimental measurements. Using the dynamic calculation model, which was validated by actually measured data, the relationship between architectural design and the energy performance of the building was analyzed. The influence of selected different operating modes for heat consumption on heating, cooling, ventilation, and interior overheating is observed. The result of the mutual interaction of several input parameters of variant solutions provides the basis for optimization of the whole design.
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Study of hygrotherma behavior of thermal insulating materials based on natural fibers
Kosturová, Andrea ; Peterková, Jitka (referee) ; Zach, Jiří (advisor)
The content of this work is to describe the transport of heat and moisture in thermal insulation materials based on natural fibers. The disadvantage in using these materials when incorporated into the construction is their low resistance to moisture. Therefore this work is further interested on possible modifications of natural fibers, which could correct it. Implemented literature research is approaching trends in the usage of dynamic simulations of heat and moisture transfer through material. Based on the findings from previous works on the VUT and theoretical part there were applied various kinds of impregnating preparations on a sample of insulation from hemp and the evaluation of their effect on the properties of the insulator.
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Comparison of simulation programs and their application
Krupa, Martin ; Kuncová, Martina (advisor) ; Řezanková, Hana (referee)
Abstract (eng): This diploma paper compares available software for simulations. These are MATLAB, WITNESS, SIMUL8, SIMPROCESS and CRYSTAL BALL. In the first part, the dynamic simulations are explained, its methodic, purpose, areas of implementation and after that it describes the simulation of Monte Carlo type. These are the basic types of simulations used by programs mentioned in this paper. After a short introduction follows detailed description of the system requirements, user interface and the principles of working with these programs, that contains also a definition of basic function blocks. This paper also describes another important information like price, available licenses and in the attachment the pictures of the programs interface. The next part of my paper is based on analyze of observed articles, which concern this special area of interest. I try to describe the usage of this software on a market, area of application or eventually a type of simulation. The information from data assimilation are ordered in transparent tables and visualized on a graphs and diagrams. At the end is the final summary, which I believe will be beneficiary for the readers.
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