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Topology optimization of a quadcopter arm using 3D print
Simon, Jakub ; Červinek, Ondřej (referee) ; Vaverka, Ondřej (advisor)
This bachelor thesis deals with the comparison of manufacturing constraints applied during topology optimization of a demonstration component, which was a quadcopter arm. Four designed arms were optimized, each with different manufacturing constraints: Extrusion, Single draw, Split draw, Overhang and one arm only with symmetry plane, without any other manufacturing constraint. For all designs, it was important to maintain a continuous geometry during optimization and that final weight approximately equals to the weight of the original arm. All five arms were then subjected to static structural analysis with the finite element method. After that, arms were printed using Fused deposition modelling (FDM) from ABS material and then tested by static force. The photogrammetry method was used to evaluate deformation. Results of the experiment were recalculated to relative stiffness, where small differences between weights were considered. Relative stiffnesses of designed arms were then compared, showing that 4 out of 5 topology optimized arms have higher stiffness than the original shape. The toughest design is without manufacturing constraints which at the same weight has 12.5 times higher relative stiffness than the original arm.
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SW model of PLC controlled crossing
Simon, Jakub ; Bílek, Michal (referee) ; Zezulka, František (advisor)
The objective of this thesis is to create a software model to control various types of crossroads using programmable logic controller. The control system is created on Siemens PLC SIMATIC S7-300. The programmes of system are written in different programming languages such as GRAPH, STL, LAD. The visualisation is also created to control by using of SCADA system InTouch from the company Wonderware. The visualisation comunicates with the PLC using a DAServer. The visualisation has both, input and output elements, so it is not intended for supervising the run of the control system only, but also for simple user‘s control, using a graphical user interface. It is possible to control the start and stop events of the system, and to switch between different crossroad's control modes and also to trigger the pedestrian's button.
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Control of manipulator model
Simon, Jakub ; Jirgl, Miroslav (referee) ; Zezulka, František (advisor)
The task was to study the physical model of the coordinate manipulator. It is controlled by two stepping motors by Schneider Electric and Beckhoff¨s industrial IPC. Then get to know the TwinCAT control software communicating on the EtherCAT network. Then revive the model and create a task to illustrate the functionality of the model with a simple ON / OFF third axis, as well as revive the industrial camera. Then create your own design of a full-fledged third axis and let it be realized. Finally, create an illustration application with the full-fledged third axis manipulator.
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Design of Bridge on the road I/58
Odvárka, Miroslav ; Šimon, Jan (referee) ; Zich, Miloš (advisor)
This diploma thesis deals with the design of the bridge o the road I/58 over a watercourse and dirt road. The main content is the design and calculation of a continuous bridge structure with two bays. During designing the bridge, I based on Czech and European standards especially ČSN EN 1991 and ČSN EN 1992. A two-beam structure was selected from the developed three variants of bridging. Drawing documentation, construction procedure, visualization and static calculation were prepared for it. The result is an economical bridge structure with high durability and almost maintenance-free operation.
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Prefabricated concrete structure
Šimon, Jan ; Šulák, Pavel (referee) ; Bažant, Zdeněk (advisor)
The master thesis is about a design of supporting structure of prefabricated skeleton hall. The major part of a design are an internal trasverse and longitudinal frames, which contents roof reinforce concrete truss, columns, beam and ceiling joists. All the load acting to the bearing structure is transferred to the prefabricate footing made of reinforce concrete. Other parts of the bulding are not solved in this thesis. The content of the thesis consists of an assembly drawing of parts of the skeleton and the static calculation according to the actual international standards. The output of each static calculation is drawing of a shape of part and its reinforcement.
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Using Softcomputing Techniques for User Behavior Prediction and Analysis
Šimon, Jakub ; Sopuch, Zbyněk (referee) ; Minařík, Miloš (advisor)
This Bachelor's thesis studies the possibilities of employee's behavior prediction and analysis. It uses softcomputing techniques, two types of neural networks - Multi-layer feedforward neural network with the Backpropagation algorithm, and Kohonen selforganizing map. The experiments performed on real activity records of employees are included. Part of the thesis is focused on activity records data and their characteristics. As a conclusion some basic information about the pros and cons of neural networks' use in the field of employee behavior prediction and analysis is given.
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Concrete structure of railway platform
Šimon, Jan ; Šulák,, Pavel (referee) ; Bažant, Zdeněk (advisor)
The bachelor´s work is has engeaged of the concept of a roof load-bearing construction of the railway covered platform. It is concernerd of a momolithic ferroconcrete scelet construction with a console panel. The weighting is put over to separate footing. The summary of the bachelor’s work is based upon dimenzation and designing elements of load-bearing construction accordance with ultimate limit state. Result of the each static calculation is design of armature .
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Fossil clown beetles (Coleoptera: Histeridae): early evolution of "beetle tanks"
Simon Pražák, Jan ; Prokop, Jakub (advisor) ; Růžička, Jan (referee)
Clown beetles (Histeridae) represent a diverse (>4500 described species) group of beetles with worldwide distribution (except Antarctica) and with exceptional diversity of occupied habitats. Specialisation on environments such as subcortical space, dung and carrion, tunnels of wood- boring insects, caves, sand deserts, beaches, rodent burrows or ant colonies, has led to remarkable adaptations of morphology and even radical changes of entire body shape. To understand evolutionary paths of this extraordinary group of beetles, fossils are of vital importance. In this study, I examined eight undescribed species of fossil Histeridae from mid-Cretaceous Burmese and Hkamti ambers. I provide morphological descriptions and discuss possible taxonomical position of these species based on morphological characters. I further tested the phylogenetic position of all Cretaceous Histeridae genera via a topology-constrained maximum parsimony analysis based on a set of 69 characters. Among the studied species, representatives of Abraeini and Paromalini are reported for the first time from the Cretaceous. I discuss evolutionary implications based on the new as well as other Histeridae fossils. Subcortical strategy was likely common in the Cretaceous histerids, now reported in three separate lineages. It is also...
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Topology optimization of a quadcopter arm using 3D print
Simon, Jakub ; Červinek, Ondřej (referee) ; Vaverka, Ondřej (advisor)
This bachelor thesis deals with the comparison of manufacturing constraints applied during topology optimization of a demonstration component, which was a quadcopter arm. Four designed arms were optimized, each with different manufacturing constraints: Extrusion, Single draw, Split draw, Overhang and one arm only with symmetry plane, without any other manufacturing constraint. For all designs, it was important to maintain a continuous geometry during optimization and that final weight approximately equals to the weight of the original arm. All five arms were then subjected to static structural analysis with the finite element method. After that, arms were printed using Fused deposition modelling (FDM) from ABS material and then tested by static force. The photogrammetry method was used to evaluate deformation. Results of the experiment were recalculated to relative stiffness, where small differences between weights were considered. Relative stiffnesses of designed arms were then compared, showing that 4 out of 5 topology optimized arms have higher stiffness than the original shape. The toughest design is without manufacturing constraints which at the same weight has 12.5 times higher relative stiffness than the original arm.
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