|
|
Proposal of the modular support equipment for the CubeSat integration
Kukla, Ondřej ; Lazar, Václav (oponent) ; Vaverka, Jan (vedoucí práce)
The aim of this diploma thesis is to create a design of Mechanical Ground Support Equipment for CubeSat integration. In the text below, CubeSats are generally introduced together with commercially available products for their integration. The final design was chosen based on a comparison of parameters and results from the market research. The design itself was successfully created, 3D data and drawings are attached to the work.
|
|
|
Flexible structure development for efficient heat transfer
Černoch, Jakub ; Lazar, Václav (oponent) ; Mašek, Jakub (vedoucí práce)
The master’s thesis deals with theoretical calculations and design of a structure for heat transfer, which is part of a Miniaturized Heat Switch according to the specified requirements of the European Space Agency. The basic parameters are low weight and high thermal conductivity. The work follows the switch designed by Arescosmo, which did not meet the requirements, especially in the area of weight and thermal conductivity. Using theoretical calculations of weight and thermal conductivity, 49 variants were verified in 3 basic concepts – Mechanical contact structure, flexible structure composed of wires and foil structure. In terms of thermal conductivity, the best structures are those based on the use of metal stocking and sleeving braids. Manufacturing technologies have also been proposed from available sources that could be used to produce these structures. To meet the requirements, in the next phase of the project it will be necessary to produce experimental samples on which the theoretical calculations and selected technologies will be verified.
|
|
|
Verification of multi-layer insulation in simulated space environment
Čapka, Filip ; Mašek, Jakub (oponent) ; Lazar, Václav (vedoucí práce)
The first part of this thesis stays the currently used ways of active and passive thermal control in spacecrafts. It focuses on Multi-layer insulation, which is one of the passive methods of thermoregulation. It describes the materials from which MLI is usually made and describes the most problematic parts of its use and production. In the second half the thesis describes the devices used for a proposed test of MLI´s performance as a barrier against heat loss. The results of the experiment are concluded in the end.
|
|
|
Design proposal of the 12U CubeSat structure
Kopecký, Matěj ; Lazar, Václav (oponent) ; Junas, Milan (vedoucí práce)
CubeSats are nowadays highly popular topic, due to their price and simplicity. Lately, their use is mainly concentrated in commercial sphere of market, where number of companies providing wide spectrum of services for CubeSat missions, are being founded. One of these companies is also Czech Aerospace Research Centre (VZLÚ), which recently began development of series of 1U – 3U CubeSat structures. This master´s thesis is written in collaboration with VZLÚ. It is focused upon creation of information platform, including market research and following design with its analysis and check of 12U CubeSat structure as a continuation in the scope of further development of series of 6U – 12U structures.
|
|
|
Design proposal and analysis of the 3D printed 1U CubeSat frame
Kilián, Ondřej ; Jetela, Václav (oponent) ; Lazar, Václav (vedoucí práce)
This thesis contains the process of design and subsequent FEM analysis of a CubeSat class satellite with accordance to the “CubeSat Design Specification” from Californian Polytechnic State University revision 14. The software used for the design and generation of supportive materials is the Autodesk Inventor Pro 2020, generation of the G-code for printing is done in the PrusaSlicer 2.4.1. software and the analysis are done in the MSC Pantran and MSC Nastran software package. The overall design is considered as successful as it meets all the criteria, and the analysis shows that it can withstand the loads present in the launch process to the earth’s orbit.
|
|
|
Experimental study on satellite´s passive thermal-regulation units
Mateášik, Timko Marek ; Mašek, Jakub (oponent) ; Lazar, Václav (vedoucí práce)
Master‘s thesis examines the eect of thermal interface materials on thermal contact conductance and resistance. The thesis focuses on application of the thermal interface materials for the thermal contact conductance enhancement in the miniaturised heat switch and the spacecraft generally. Theoretical part of this work briey reviews variety of passive thermal control systems used in spacecraft, including thermal interface materials and explains the background of this work. This work further a reviews of the variety of thermal interface materials, especially coatings and foils, and introduce the selection of suitable thermal interface materials. Experimental part of this work examines surface parameters, thermal conductivity and microhardness of copper specimens which serve as substrate for pure silver coating. Further examines the measurement conditions, evaluation methods and experimental measurements. The experimental measurements are carried out in thermo-vacuum test chamber and conclusion are made based on the results. The recommendations for further work are made.
|
|
|
Conceptional design for upgrade use of Cleanroom for aerospace parts testing
Halamíček, Samuel ; Mašek, Jakub (oponent) ; Lazar, Václav (vedoucí práce)
The thesis focuses on the problematics around designing a cleanroom. The aim is to present a conceptional design to upgrade the use of a cleanroom for aerospace parts testing. The first part of the thesis covers the introduction into the cleanroom problematics. Based on the research and the given requirements, the parameters for the cleanroom are defined. The second half presents a conceptional proposal where each one difference represents a different mindset behind it. For verification of a possibility to achieve the aimed classification, the model of the cleanroom was constructed in a SOLIDWORKS and then the airflow inside the cleanroom was simulated in an ANSYS FLUENT.
|
|
|
Calibration task of experimental device for space technology testing
Lazar, Václav ; Horák, Marek (oponent) ; Mašek, Jakub (vedoucí práce)
The Master thesis deals with an experimental test facility calibration procedure. The thesis focuses on a complex mathematical thermal model proposal, which describes the inner facility thermal processes during the specimen conductance measurements. The first section introduces the test facility, its limits, and the measurement principle. The necessary third version facility upgrades made to secure the prescribed test conditions are covered. The calibration need and reasons also resonate through the first section. The second part aims at the calibration specimens and the Thermal Model designs proposals. The specimens requirements and their final properties are brought forward. The determined heat losses calculations are completed with the defined refining procedure suggestion. The calibration specimens measurements were performed with a new test facility version three. The measured results will serve as calibration inputs for the Thermal Model tuning, necessary for the calibration task completion. The functional model will enable to proceed with the next phase of the test facility experiments.
|
|
| |
|
|
Influence of space debris on satellites design
Hláčik, Adam ; Lazar, Václav (oponent) ; Bartoněk, Jaroslav (vedoucí práce)
The bachelor thesis summarizes the space debris problem and its impacts on the uncrewed spacecraft design. The primary goal is to combine theoretical understandings of the space debris topic with the practical implementation of these findings in the "design for debris" strategy. The first chapter of the thesis examines the properties of space. debris. Findings from this chapter must be considered during the mission and spacecraft design phase, alongside other design driving attributes. The practical part demonstrates the "design for debris" approach in a model case study. The design approach is based on the Micro Meteriod and Orbital Debris analysis findings, which characterize the interaction of debris particles with spacecraft during the course of a mission. Alongside characterization of debris population on mission orbit, analysis can detect weak spots of spacecraft design that are vulnerable to debris impact. Risk-reducing modifications based on analysis data and problem understanding can be applied to reduce the possibility of a spacecraft failure. Another analysis iteration can verify the effectiveness of proposed modifications.
|
host ::
RSS.