Essays about: "Flexible appendages"

Found 4 essays containing the words Flexible appendages.

  1. 1. Validation of the attitude control of KNATTE with flexible appendages

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

    Author : Christoffer Johansson; [2022]
    Keywords : KNATTE; flexible appendages; control; SMC; LQG; PWM; PWPF;

    Abstract : The effect of flexible panels on a spacecraft during attitude movement may induce problems if not correctly accounted for in the control system for the spacecraft. The aim of this thesis is to find and evaluate, control algorithms that could be suitable for the Kinesthetic Node and Autonomous Table-Top Emulator (KNATTE) with two flexible mock-up solar panels during an attitude movement of 20 degrees. READ MORE

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

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

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

    Abstract : 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. READ MORE

  4. 3. Review of Observation and SystemIdentification Techniques in a VerifiedModel of a Satellite with Flexible Panels

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Aydin Nakhaeezadeh Gutierrez; [2020]
    Keywords : Satellite Modelling; flexible appendices; Structure Monitoring; System Identification; N4SID; DUKF;

    Abstract : The demand of space applications has been increasing over the years. This has derivedin new satellites structures that required from precise and robust control management.The satellite design is evolving towards the development of lighter structures. READ MORE

  5. 4. State- and Parameter Estimation for Spacecraft with Flexible Appendages using Unscented Kalman Filters

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

    Author : Andrea Mosquera Alonso; [2019]
    Keywords : Estimation; flexibility; flexible spacecraft; spacecraft; kalman filter; unscented Kalman filter; spacecraft dynamics; flexible dynamics;

    Abstract : The problem of system identification for dynamic effects on spacecraft has become increasingly relevant with the surge of agile spacecraft, which must perform large amplitude maneuvers at high rates. Precise knowledge of the state of the spacecraft, as well as of the parameters characterizing its motion, is vital for the design of control algorithms enabling stabilization and pointing accuracy. READ MORE