Sökning: "Attitude controller"

Visar resultat 21 - 25 av 35 uppsatser innehållade orden Attitude controller.

1. 21. Black-Box Modeling and Attitude Control of a Quadcopter

   Master-uppsats, Linköpings universitet/Reglerteknik

   Författare :Ingrid Kugelberg; [2016]
   Nyckelord :Attitude Control; Black-Box Modeling; Closed-Loop Identification; Multicopter; PID; Quadcopter; System Identification; UAV;

   Sammanfattning : In this thesis, black-box models describing the quadcopter system dynamics for attitude control have been estimated using closed-loop data. A quadcopter is a naturally unstable multiple input multiple output (MIMO) system and is therefore an interesting platform to test and evaluate ideas in system identification and control theory on. LÄS MER

3. 22. Attitude Determination and Control of the CubeSat MIST

   Master-uppsats, KTH/Farkost och flyg

   Författare :Jiewei Zhou; [2016]
   Nyckelord :;

   Sammanfattning : The ADCS concept in MIST reects the limitations of the CubeSat in terms of space, power and onboard computer computational capability. The control is constrained to the use of only magnetic torquers and the determination to magnetometers and Sun sensors in spite of the the under-actuation and underdetermination during eclipses. LÄS MER

4. 23. Model-Based Design, Development and Control of an Underwater Vehicle

   Master-uppsats, Linköpings universitet/Reglerteknik

   Författare :Adam Aili; Erik Ekelund; [2016]
   Nyckelord :Model; Design; Development; Control; Underwater; Underwater vehicle; BlueROV; ROV; Fossen; Modelling; Parameter Estimation; Prediction-error method; Extended Kalman filter; EKF; Feedback linearisation; Attitude controller; Angular velocity controller;

   Sammanfattning : With the rising popularity of ROVs and other UV solutions, more robust and high performance controllers have become a necessity. A model of the ROV or UV can be a valuable tool during control synthesis. The main objective of this thesis was to use a model in design and development of controllers for an ROV. LÄS MER

5. 24. Development of Star Tracker Attitude and Position Determination System for Spacecraft Maneuvering and Docking Facility

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Serkan Dikmen; [2016]
   Nyckelord :star sensor; optical sensor; image processing; vision system; OpenCV; star tracker algorithms; voting methods; star catalog; attitude and position determination; star image; ground station; TCP communication; spacecraft maneuvering and docking facility;

   Sammanfattning : Attitude and position determination systems in satellites are absolutely necessary to keep the desired trajectory. A very accurate, reliable and most used sensor for attitude determination is the star tracker, which orient itself in space by observing and comparing star constellations with known star patterns. LÄS MER

7. 25. Attitude and Orbit Control During Deorbit of Tethered Space Debris

   Master-uppsats, KTH/Farkost och flyg

   Författare :Linus Flodin; [2015]
   Nyckelord :space debris mitigation; deorbit; tethered satellites; mathematical modeling; attitude and orbit control system; LQG control; PID control; switched control;

   Sammanfattning : Due to the unsustainable space debris environment in Low Earth Orbit, debris objects must be removed to ensure future safe satellite operations. One proposed concept for deorbiting larger space debris objects, such as decommissioned satellites or spent upper rocket stages, is to use a chaser spacecraft connected to the debris object by an elastic tether, but the required technology is immature and there is a lack of flight experience. LÄS MER