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Showing result 21 - 25 of 4955 essays matching the above criteria.

1. 21. Ensuring safe docking maneuvers on floating platform using Nonlinear Model Predictive Control (NMPC)

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Federico Gatti; [2024]
   Keywords : Robotics; Space Engineering; Docking Maneuvers; Floating Platforms; Nonlinear MPC; MPC; Barrier function; PWM;

   Abstract : Docking maneuvers are a relevant part of the modern space mission, requiring precision and safety to ensure the success of the overall mission. This thesis proposes using a non-linear Model Predictive Control (MPC) as a controller with various constraints to ensure safe docking maneuvers for a satellite. READ MORE

3. 22. Increasing the diodicity of ceramic Tesla valves by exploiting the design freedom of additive manufacturing : A study in design optimizations of Tesla valves for ceramic 3D printing

   University essay from Uppsala universitet/Institutionen för materialvetenskap

   Author : Udit Sharma; [2024]
   Keywords : additive; manufacturing; Tesla; valve; ceramic; 3D; printing;

   Abstract : The work presented in this thesis was conducted at Uppsala University and at Fraunhofer IKTS, Dresden. The thesis aims to study design optimizations for increasing the diodicity and thereby performance of a Tesla valve, a type of “no moving parts” (NMP) valve, through design freedoms offered by ceramic additive manufacturing. READ MORE

4. 23. Solving the incompressible Navier-Stokes equations in 3-D to model gas flow in a room

   University essay from Uppsala universitet/Avdelningen för beräkningsvetenskap

   Author : Fredrik Malmström; [2024]
   Keywords : ;

   Abstract : The thesis proposes to model the flow of gases in a room by solving the incompressible Navier-Stokes equations in three dimensions. The transportationof scalars such as temperature and concentration of CO2 is modeled by solving the advection-diffusion equation, and the effects of temperature on thevelocity is accounted for by employing the Boussinesq approximation. READ MORE

5. 24. Conjugate Heat Transfer Analysis of HPGP Thruster

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Lisa Svensson; [2024]
   Keywords : aerospace; HPGP; ECAPS; ANSYS; conjugate heat transfer; thruster; space;

   Abstract : This master's thesis was conducted in collaboration with ECAPS, where a conjugate heat transfer analysis on their High Performance Green Propulsion (HPGP) 22N thruster was done. ECAPS is a Swedish propulsion company specializing in green propulsion. They develop thrusters for spacecraft orbit and attitude control, utilizing the propellant LMP-103S. READ MORE

6. 25. The Role of Functional Traits and Trade-offs in Seasonal Succession of Phytoplankton Community Structuring : A numerical investigation of resource acquisition traits of Lake Constance

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Ayesha Nagahage; [2024]
   Keywords : Phytoplankton; resource acquisition; traits; trade-off; resource limitation;

   Abstract : Long-term ecological research in deep lakes offers valuable insights into understanding changes in trophic states and organization of phytoplankton assemblages. Utilizing five decades of phytoplankton taxonomic trait data from pre-alpine Lake Constance, a confirmed negative relationship was found between phosphate and light affinity at the annual community trait level. READ MORE