Sökning: "cold gas propulsion"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden cold gas propulsion.

1. 1. Benchmarking a 1 kW hybrid hydrogen fuel cell system

   Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Jonathan Envall; [2023]
   Nyckelord :PEMFC; fuel cell; UAV; hybrid; Technology and Engineering;

   Sammanfattning : Unmanned Aerial Vehicles (UAV's) offer great versatility in the tasks that they may perform and they are today used in many sectors. The H24LEO project, administered by the Lund University School of Aviation, aims to develop and demonstrate a hybrid proton-exchange membrane fuel cell-powered UAV to aid in search and rescue operations performed by the Swedish Maritime Administration, and reduce the greenhouse gas emissions compared to similar work performed by helicopters. LÄS MER

3. 2. Vibration analysis and testing of a 6U cubesat propulsion system

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Likitha Thimmaraju Girijadevi; [2023]
   Nyckelord :6U CubeSat; Propulsion system; Vibration testing; COMSOL; Structures; ECSS; Stress; Resonance; Frequency; Load; Simulation.; 6U CubeSat; Framdrivningssystem; Vibrationstestning; COMSOL; Strukturer; ECSS; Stress; Resonans; Frekvens; Belastning; Simulering.;

   Sammanfattning : Space industry has been booming in the recent times, investments have not justbeen made on satellites and launch vehicles but also on space sustainability. Spaceindustry has its users in national agencies, private commercial agencies, academia andexperimental organisations. LÄS MER

4. 3. Development of Test Methodologies and Setups for Thrust Measurements of Cold Gas Micro-thrusters for CubeSats

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Aleksander Kipiela; [2022]
   Nyckelord :Thrust measurements; cold gas propulsion; micro thrusters; hanging pendulum; CubeSat; Dragkraftsmätning; kallgasframdrivning; mikrodysor; hängande pendel; CubeSat;

   Sammanfattning : Measuring the thrust of cold gas micro-thrusters, due to the small magnitude of the generated force, is a challenging task, and to obtain satisfying quality of results usually careful adjustments of the setup has to be performed. The work presented in this paper aims at improving the quality of such measurements at the GomSpace Sweden company. LÄS MER

5. 4. Heat and fluid control solutions for deep space CubeSat CGPS

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Filipp Byström-Troyan; [2021]
   Nyckelord :Cold gas propulsion; Thermal control; Computer simulation; Kallgasframdrivning; Termisk analys; Datorsimulering;

   Sammanfattning : This thesis is on the subject of how propellant heating considerations affect the design of a CubeSat cold gas propulsion system. Computer simulation tools are used to analyse heat flow through the system, as well as the fluid flow and phase change of butane. LÄS MER

7. 5. Methods to operate and evaluate the performance of a cold-gas CubeSat propulsion system on a magnetically stabilised satellite

   Master-uppsats, KTH/Rymdteknik

   Författare :Victor Alberto Gonzalez Marin; [2020]
   Nyckelord :Propulsion system; CubeSat; Performance; Operating procedure; Mission experiment; Framdrivningssystem; CubeSat; Prestanda; Driftsrutin; Driftprov;

   Sammanfattning : Propulsion systems allow satellites to perform many functionalities in space, such as orbital station keeping, reentry control, attitude control, orbital transferring, rendezvous operation, and even more thrilling, interplanetary travel. Indeed, propulsion systems in satellites have fostered a new favourable era of space exploration and application, therefore, detailed processes to operate propulsion systems need to be developed so that space missions, carrying this valuable system, are completed successfully. LÄS MER