Sökning: "matlab luleå"

Visar resultat 21 - 25 av 78 uppsatser innehållade orden matlab luleå.

1. 21. Modelling and testing of a solar panel structure for KNATTE (Kinesthetic Node and Autonomous Table-Top Emulator)

   Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Elena Fernández Bravo; [2021]
   Nyckelord :Frictionless platform; Linear Quadratic Gaussian; Flexible appendages; Finite Element Method;

   Sammanfattning : One of the challenges that satellites face is the interaction between control movement and vibration of flexible appendages such as solar arrays and antennas that can negatively affect the performance of the spacecraft. The aim of this thesis is to develop a numerical model of a solar panel structure for KNATTE, a frictionless platform developed by the Onboard Space Systems group at Luleå University of Technology, and develop a control law that reduces the flexible vibration of the solar arrays when attitude control manoeuvres are performed. LÄS MER

3. 22. Towards a Climatology of Polar Stratospheric Cloudsbased on observation with the IRF lidar

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Oliver Willbrink; [2021]
   Nyckelord :;

   Sammanfattning : The effect that the Polar stratospheric clouds (PSCs) have on the destruction of ozone in the polar vortex is well known. The study of these clouds is therefore highly relevant and important. A tool that can be used to gather parameters needed to describe the PSC is a lidar (Light Detection and Ranging). LÄS MER

4. 23. Utmaningar vid kablifiering av 145 kV-nät

   Uppsats för yrkesexamina på grundnivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Ulrika Assarsson; [2021]
   Nyckelord :Kablifiering; resonans; resonansfrekvens;

   Sammanfattning : Att ersätta friledning med kabel i högspänningsnät innebär ett antal olika utmaningar som måste hanteras. Det dominerade teknikvalet för högspänning har av tradition varit friledning, som är en kostnadseffektiv och driftsäker metod för överföring av effekt. LÄS MER

5. 24. An Investigation of the breakage process of particles : With help of experimental results and discrete element methods

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Författare :Ronni Bashiry; [2021]
   Nyckelord :Geotechnical Engineering; Breakage; Fracture; Spherical particles; DEM; Modelling; Numerical modelling;

   Sammanfattning : In this study the breakage mechanics of brittle glass marbles was investigated. The pro-cess was to firstly investigate them in laboratory environment. The marbles or specimens was loaded until a crushing breakage occurred in a single point load test called Single Sphere Point load test in this document. LÄS MER

7. 25. Investigating the Impact of Water Injection on Noise Generation During Rocket Lift-Off

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Sångberg Linus; [2021]
   Nyckelord :Rocket lift-off; Turbulent mixing noise; CFD;

   Sammanfattning : This thesis aim to provide SSC, Swedish Space Corporation, with a foundation for understanding the key ideas behind water injection during rocket lift-off, including problems to be avoided when simulating the phenomena. This investigation focus on finding approaches suitable for obtaining a rough estimate of the reduction in noise generation, when too expensive equipment required is absent. LÄS MER