Essays about: "control spacecraft"

Showing result 6 - 10 of 67 essays containing the words control spacecraft.

1. 6. Real Time Navigation Algorithms for LEO Small Satellites using COTS GNSS

   University essay from KTH/Lantmäteri – fastighetsvetenskap och geodesi

   Author : Nathan Groisne; [2023]
   Keywords : PNT; Small Satellite; COTS; GNSS; Navigation; ACS; PNT; små satelliter; COTS; GNSS; navigering; ACS;

   Abstract : Many satellites in LEO use a GNSS-based navigation system, taking advantage of the GNSS constellations in MEO to enhance navigation capabilities. The thesis work focused on developing the software enabling GNSS-based navigation for Hemeria's future small satellites operating in LEO. READ MORE

3. 7. Flight Dynamics Software Industrialisation for Inclined Orbits

   University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Author : Pierrick Houede; [2023]
   Keywords : flight; dynamics; software; FDS; geostationary; orbit; station; keeping; uncontrolled; inclination.;

   Abstract : The geostationary orbit has many applications for Earth observation and telecommunications. Like all satellites, spacecraft in this type of orbit are affected by perturbations. These perturbations can modify the satellites trajectories and, without control, deviate them from their target position. READ MORE

4. 8. Improving the guidance, navigation and control design of the KNATTE platform

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

   Author : Lars Lundström; [2023]
   Keywords : Multisensor Data Fusion; Nonlinear Kalman Filter; Neural Network;

   Abstract : For complex satellite missions that rely on agile and high-precision manoeuvres, the low-friction aspect of the space environment is a critical component in understanding the attitude control dynamics of the spacecraft. The Kinesthetic Node and Autonomous Table-Top Emulator (KNATTE) is a three-degree-of-freedom frictionless vehicle that serves as the foundation of a multipurpose platform for real-time spacecraft hardware-in-the-loop experiments, and allows emulation of these conditions in two dimensions with the purpose of validating various guidance, navigation, and control algorithms. READ MORE

5. 9. Application of Discrete Time High Order Control Barrier Functions for a prototype multi-spacecraft inspection of the ISS

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Gregorio Marchesini; [2023]
   Keywords : Space Robotics; Control Barrier Functions; Autonomous systems; Multi-agent systems;

   Abstract : In the past few years, the application of Control Barrier Functions (CBF) and High Order Control Barrier Functions (HOCBF) as a suitable framework to ensure safety for autonomous systems has attracted increasing interest. In particular, autonomous space systems are frequently subject to safety-critical constraints due to the high costs involved in manufacturing and launching. READ MORE

6. 10. Resonance Mitigation in the Attitude Control of a Flexible Large Solar Sail

   University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Author : Jonas Linnros; [2023]
   Keywords : Resonance; Control theory; Mechanics; Solar sail; PID; Space; Resonans; Reglerteknik; Mekanik; Solsegel; PID; Rymd;

   Abstract : This project is about the design process of a resonancemitigating algorithm for a large solar sail. The solar sail isa structure made up by four long booms in a cross patternwith suspended sails between the edges of the booms. Thespacecraft in this report is controlled using smaller rotatingsails at each tip of the booms. READ MORE