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Increasing the range of a vehicle with alternative propulsion
Dryml, Tomáš ; Ranuša, Matúš (referee) ; Navrátil, Václav (advisor)
The bachelor's thesis deals with increasing the range of a vehicle with an alternative drive, which is compressed air. First, an analysis of the pneumatic circuit is performed, from which the areas to be modified result. To improve, it is chosen to find a suitable working pressure and the correct filling, which is calculated on the basis of constant pressure filling and subsequent adiabatic gas expansion. From the theoretical calculation, the runs per cylinder stroke at different pressures are determined and the selected pressures are subsequently experimentally verified. The results show that the most suitable setting increased the range from 331 meters using the original setting, to 616 meters with the new setting.
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The automated line for testing tank tightness
Kropáč, Jan ; Prášek, Radovan (referee) ; Zeizinger, Lukáš (advisor)
This diploma thesis deals with the design of a production line segment, which is supposed to do automated testing of the heat pump segment tightness. It discusses different kinds of handling and testing problems. The result is choice of the most suitable concepts, which are designed and then processed into a 3D model. Simulations are created for selected parts to optimize them. At the end, the implementation of the project is briefly described. Part of the work is drawing documentation and a pneumatic diagram of the machine.
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Bidirectional pneumatic stepper motor
Veselý, Václav ; Pavlík, Jan (referee) ; Kolíbal, Zdeněk (advisor)
The diploma thesis Bidirectional pneumatic stepper motor concentrates on a step shaft rotation in the presented scheme of a kinematic mechanism. The introductory research part of the diploma thesis lists various types of pneumatic components and the analysis of elements in pneumatic circuits is provided. The following section of the thesis concentrates on designing a new scheme of a pneumatic stepper and construction of a functional mock-up. The final part of the diploma thesis offers a summary and final evaluation of the design and offers subsequent alterations for its further usage.
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Design and digital commissioning of the bag handling gripper
Vávra, Daniel ; Pavlík, Jan (referee) ; Vetiška, Jan (advisor)
This bachelor‘s thesis deals with a conceptual design of a handling gripper for 25-kilo bags and its subsequent digital commissioning. The theoretical part explains the issue with end effectors for handling, including introduction of specific concepts of bag handling grippers by chosen companies. There is also a problematic of virtual commissioning mentioned in the end of the theoretical part. The practical part deals with the conceptual design of the gripper itself, which is then substantiated by needed strength and kinematic analysis in a calculation report. The main advantage of designed solution is, apart from high moving speed, pallet gripping mechanism, due to which the gripper is able to prepare pallets for subsequent bag palletization automatically. In the end, the chosen conceptual solution is digitally commissioned in ABB Robot Studio program, along with creating a simulation of gripper moves.
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Increasing the range of a vehicle with alternative propulsion
Dryml, Tomáš ; Ranuša, Matúš (referee) ; Navrátil, Václav (advisor)
The bachelor's thesis deals with increasing the range of a vehicle with an alternative drive, which is compressed air. First, an analysis of the pneumatic circuit is performed, from which the areas to be modified result. To improve, it is chosen to find a suitable working pressure and the correct filling, which is calculated on the basis of constant pressure filling and subsequent adiabatic gas expansion. From the theoretical calculation, the runs per cylinder stroke at different pressures are determined and the selected pressures are subsequently experimentally verified. The results show that the most suitable setting increased the range from 331 meters using the original setting, to 616 meters with the new setting.
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Design of single-purpose assembly machine for assembly of gas distributor in gas grill
Procházka, Petr ; Pavlík, Jan (referee) ; Knoflíček, Radek (advisor)
Objective of this thesis is creating the construction of one-purpose assembly machine for combination of gas switchboard in gas grill assembly, which is top part of the gas cooking grill, consisting of stainless steel plate and burners. There are three types of burners, one small type, two medium types and one big type. Each consists of aluminium body, nozzle, ignition electrode and gas leakage protection fuse. Prior to construction itself, variant solutions of the assembly operations arrangement are designated. From those, the most appropriate one is chosen based on multicriteria weighting method. Construction of assembly line is created using 3D modelling program with necessary design calculations. For selected assemblies and parts, a drawing documentation has been created. Risk analysis and security of the machine’s normal operation is an integral part of the thesis. Risk analysis is created for the machine’s normal operation. In conclusion, the costs of purchasing the assembly line are calculated and the return of the investment for purchasing the machine is assessed.
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Design of pneumatic cylinder testing equipment
Macek, Tomáš ; Pavlík, Jan (referee) ; Tůma, Zdeněk (advisor)
This diploma thesis deals with the design of test equipment for selected types of pneumatic cylinders. In the first, theoretical, part of the work is an analysis of the current state of knowledge in the field of pneumatic cylinders. Furthermore, the problems in the field of measurement and testing of pneumatic components are described here, selected linear position sensors are also described herein too. The second, practical, part deals with the choice of a suitable design variant and the actual solution of the test equipment design. A pneumatic circuit is also designed here. Part of the work is a 3D model of the test equipment and drawing documentation. The conclusion of the work is devoted to the overall evaluation of the work and recommendations for practice.
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Diagnosis of Pneumatic Cylinders Using Acoustic Emission Methods
Mahmoud, Houssam ; Baran,, Ireneusz (referee) ; Santos, Serge Dos (referee) ; Mazal, Pavel (advisor)
Tato práce se zabývá vývojem nového efektivního diagnostického postupu pro kontrolu funkce pneumatických válců pomocí metody akustické emise. Cílem práce bylo navrhnout a určit diagnostická kritéria pro hodnocení kvality vybraných typů pneumatických válců. Prvním krokem bylo nalezení typického akustického emisního signálu, který je spojen s určitým typem poškození ve válci využitím frekvenčního spektra signálu. Později byl tento parametr nahrazen parametrem RMS během sledování změn v průběhu testů. Na konkrétních válcích byl sledován vztah mezi akustickou emisí a různými typy defektů a byl představen nový přístup k určování těchto typů vad a jejich odlišením v signálu akustické emise. Druhý krok studie že neporušené a poškozené válce byly porovnávány tak, aby se zjistily výrazné rozdíly, které určují, zda je válec poškozen nebo nepoškozen. Několik nepoškozených válců bylo testováno akustickou emisí a následně v nich byly vytvořeny umělé vady. Signály z vysouvání a zasouvání pístu byly zaznamenány a analyzovány pomocí řady parametrů. Na základě časového zpoždění a normalizace RMS byly rozpoznány odezvy mezi poškozenými a nepoškozenými pneumatickými válci. Rozdíly byly zjištěny porovnáním maximální hodnoty RMS ze snímače upevněného na předním víku válce a snímače upevněného na zadním víku válce pro jeden cyklus. Poškozené a nepoškozené válce byly rozlišeny pomocí rozdílů energetických hodnot přítomných v signálech z obou snímačů v závislosti na zdvihu pístu. Konečné vyhodnocení válce bylo určeno výpočtem celkové hodnoty RMS. Ve třetím kroku experimentu byly válce postupně zatěžovány různými závažími ve svislém směru. Signály akustické emise byly zaznamenány z vysouvání a zasouvání pístu a poté analyzovány. Časové zpoždění se vypočítává z digitálního vstupu a začátku pohybu pístu. Energie signálu a RMS akustické emise porovnávají různé reakce v poškozených a nepoškozených pneumatických válcích s a bez zatížení. Výsledky testu ukázaly lineární vztah mezi křivkou RMS a zatížením. Defekty ovlivňují vztah mezi aplikovaným zatížením a zaznamenaným signálem snímačů.
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