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141	Modelling and Simulation of a Power Take-off in Connection with Multiple Wave Energy Converters Ghodrati, Ashkan, Rashid, Ahmed January 2014 (has links) The objective of this thesis is to develop a model that will integrate multiple buoys to a power take-off hub. The model will be derived using a time domain analysis and will consider the hydraulic coupling of the buoys and the power take-off. The derived model is reproduced in MATLAB in order to run simulations. This will give possibility to conduct a parameter study and evaluate the performance of the system. The buoy simulation model is provided by Wave4Power (W4P). It consists of a floater that is rigidly connected to a fully submerged vertical (acceleration) tube open at both ends. The tube contains a piston whose motion relative to the floater-tube system drives a power take-off mechanism. The power take-off model is provided by Ocean Harvesting Technologies AB (OHT). It comprises a mechanical gearbox and a gravity accumulator. The system is utilized to transform the irregular wave energy into a smooth electrical power output. OHT's simulation model needs to be extended with a hydraulic motor at the input shaft. There are control features in both systems, that need to be connected and synchronized with each other. Another major goal within the thesis is to test different online control techniques. A simple control strategy to optimize power capture is called sea-state tuning and it can be achieved by using a mechanical gearbox with several discrete gear ratios or with a variable displacement pump. The gear ratio of the gear box can be regulated according to a 2D look up table based on the average wave amplitude and frequency over a defined time frame. The OHT power take-off utilizes a control strategy, called spill function, to limit the excess power capture and keep the weight accumulator within a span by disengaging the input shaft from the power take-off. This is to be modified to implement power limitation with regulation of the gear ratio of the gearbox. / +46736290781 Wave power power take-off wave energy converter weight accumulator power capture control planetary gearbox modeling and simulation Social Sciences Interdisciplinary Mechanical Engineering Maskinteknik Elektroteknik och elektronik
142	Parní protitlaková turbína s integrovanou převodovkou pro pohon kompresoru / Steam backpressure turbine with integrated gearbox for the drive of the compressor Votoupal, Adam January 2019 (has links) The master’s thesis deals with the design of steam back-pressure turbine with integrated gearbox for compressor drive according to given parameters. The first part of the thesis is literature review which comprises a general division of steam turbines, especially a description of the types of blading. Furthermore, it describes the conversion of energy in the steam turbine stage in detail. The second part of the thesis contains calculations and includes the design of the flow parts of the steam turbine, the design of the outlet and the integrated gearbox. Attached to this work are drawings of a simplified section of the steam turbine with a gearbox and the layout drawing of the machine.
143	Návrh testovacího stavu pro dlouhodobé testování spojek určených pro kolejová vozidla / Design of test rig for long-term testing of couplings intended for railroad applications Machálek, Ondřej January 2019 (has links) The master thesis deals with design of test rig for long-term testing of coupling appointed to railway vehicles. At first, there is made a brief research which is related to railway coupling used for transmitting a torque. This is followed by an analysis of the most used power devices to derive real loads conditions of tested couplings. There is chosen the most appropriate conception based on made analysis and it is followed by the description of designed components. There is made a verification of modal properties non-purchased components which is necessary part of the thesis. Numerical modal analysis was performed in ANSYS Workbench software. In the end of the thesis there are included stress-strain analysis of the chosen designed components.
144	Regulace přítlaku lamelových spojek dvouspojkové převodovky / Engagement Force Control of Multi-plate Clutches of Dual Clutch Gearbox Horák, Josef January 2020 (has links) The master’s thesis deals with ways of controlling starting clutches of cars, especially of DQ200 gearbox, which contains dry disc clutches. The introduction describes basic principles of torque transfer and amount of clutch force. Then the description of construction of starting clutches and ways of controlling clutch types mentioned beforehand is given. In the next part of the thesis, wide spectrum of control methods is measured, from which a certain part is selected. This is followed by driving tests and based on driving data, one method of the clutch control is chosen. Then those control methods from narrow selection are tested for acoustic impact in the cabin of the car. In the end the best way of clutch control is selected. The selection based on driving data and acoustic measurement.
145	Akumulátorová sekačka na trávu / Battery supplied lawn mower Picmaus, Jan January 2021 (has links) The thesis deals with a concept of turning a conventional petrol powered lawn mower to a battery powered solution which is powered by lithium cells. A division to three chapters, comparison, mechanical and electrical, provides fluency of the whole design and further realization. The arrangement of chapters is performed so that the continuity of the thesis is maintained. Calculations of parameters of every motor and transmission with choosing particular devices are just a part of much interesting information which can be found in this thesis. All new components have full documentation except those which were changed during manufacturing. The electrical part explains every part of the schematics in detail. The realization contains difference between preliminary design and further production, manufacturing of the PCB and powering up the motor drives. The last part of the thesis contains temperature measurements of the device at no load.
146	Návrh nákladního výtahu / Project of service lift Drápela, Josef January 2008 (has links) This diploma thesis deal with project of service lift. The service lift is drive by special mechanism using thrust chain. The chain is led from chain accumulator over sprocket gear to vertical guiding groove. Lift car is connected to the end of chain. There are designed and described the most important constructional unit of service lift in this thesis. But the most attention is pay to drive, including break system and chain accumulator. The drive is consist of electric motor, clutch, break, planetary gearbox and sprocket gear.
147	Návrh řadicího mechanismu bezprodlevové převodovky / Zeroshifting Transmission Mechanism Design Mičola, Ivo January 2014 (has links) This thesis deals with no delay gear shifting. The first part is devoted to theoretical introduction. The next part describes comprehensive approach to vehicle dynamics, the choice of gear ratios, the use of reverse engineering to model the interior of the gear housing and the actual structural design of the internal components and strength analysis. Moreover, this work should fill the gap in the available literature which is publicly accessible.
148	Simulationsgestützter Variantenvergleich des Antriebsstranges einer Werkzeugmaschine Freigang, Tino 02 July 2018 (has links) Gekoppelte Umlaufrädergetriebe bilden den Antriebsstrang von Orbital- Bearbeitungsmaschinen (OBM). Aufgrund der Variantenzahl einsetzbarer Umlaufrädergetriebekombinationen ist die konstruktive Auslegung dieser Antriebsstränge anspruchsvoll. Der Vortrag liefert unter Verwendung der Mehrkörpersimulation (Software: SIMULATION X) einen Beitrag einer systematischen Herangehensweise zur Ermittlung wesentlicher Eingangsgrößen der komplexen Getriebedimensionierung. Aussagen über wirksame Drehmomente, Drehzahlen, Verzahnungskräfte und Verlagerungen des TCP unter spezieller Betrachtung des dynamischen Systemverhaltens der Antriebsstränge werden getroffen. Variantenrechnungen ermöglichen zudem den Vergleich verschiedener Getriebe- und Maschinenelementkonfigurationen. Vertiefend wird auf die erweiterte Modellierung der Besonderheiten der Getriebearchitektur mit spielbehafteten, gekoppelten Umlaufrädergetriebe und diverser Maschinenelemente, z.B. Hauptspindellagerung oder Wälzschraubtriebe, eingegangen. Maßnahmen der Modellvereinfachung mit dem Ziel reduzierter Rechenzeiten bei erhöhter Modellrobustheit werden dargestellt. Richtlinien der Modellverifikation sowie Konstruktionsvorgaben für den getriebebasierten Nebenantriebsstrang werden abschließend geschlussfolgert. info:eu-repo/classification/ddc/629 ddc:629
149	Modelling and Design of a Test Rig to investigate the dynamic behaviour of a Servo driven Powertrain / Modellierung und Entwurf eines Versuchsstandes zur Untersuchung des dynamischen Verhaltens eines servogetriebenen Antriebsstranges Wittwer, Max 26 March 2018 (has links) (PDF) In the present work a simulation model for examining the fundamental dynamic behaviour of a servo driven powertrain is developed. This powertrain consists of a permanent magnet synchronous motor, a cycloidal gearbox and a torque motor to apply a load. On basis of this model the selection of components for the design of a test rig is possible. This leads to the constructive draft of the test rig. In order to model the system, the fundamentals give a brief overview of the components incorporated in the test rig system. With ais of the specified task the simulation purpose is defined and the modelling process enabled. The subsequent system analysis is performed intensively to decompose the system into subsystems, which are then investigated to find the optimal modelling approach for the given simulation task. Particular emphasis is put on the investigation of the cycloidal gearbox subsystem and it shows, that approaches for modelling the dynamic behaviour of the gearbox as a whole have only been published partially. Therefore, the available modelling approaches are analysed and suitable models are developed as conceptual models. Those will be formalised and implemented in Matlab/Simulink. The model is verified and simulation experiments are performed, that help in the selection of suitable test rig components. On basis of a flexible test rig, finally the constructive draft is presented. Modellieren Modell Versuchsstand Simulation PMSM Servo Motor Konzeptmodell Systemanalyse Matlab Simulink Antriebsstrang Zykloidengetriebe Zykloide Zykloid Cyclogetriebe cycloidal Modelling Model Test Rig Simulation PMSM Servo Motor Conceptual Model System Analysis Matlab Simulink Powertrain Cycloidal Gearbox Cyloidal Drive Cyclo ddc:620 rvk:ZL 3257
150	Výpočet zatížení elektrického pohonu brány / Calculation of load on the electric drive of the gate Randa, Daniel January 2020 (has links) This thesis deals with the construction of drives for self-supporting gates. The main parts from which the drive is folded are not discussed here. In addition, the main points of load are solved which arise on the self-supporting gate and it´s contact with the guiding, carrying carts and movement elements. And here is explained what needs to be taken care of by the drive to accommodate the loads, which all aggravate the movement of the structure. in the work are also presented the load types of load calculations by which the drive parameters can be checked for suitability for the application.

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