Colloquium: Stefan Teunissen (Space Flight)
04 juli 2022 15:00 - Locatie: Lecture Room C, FACULTY OF AEROSPACE ENGINEERING, KLUYVERWEG 1, DELFT | Zet in mijn agenda
Magnetic Attitude Control for SHAPE
Currently, the trend towards miniaturization of spacecraft results in strict requirements to the attitude determination and control sub-systems to allow accurate pointing and stability for Earth observation in VLEO. The department of Space Engineering at the Delft University of Technology has proposed a 6U Cubesat named SHAPE which should set a new benchmark for Earth observation making use of small spacecraft at altitudes between 230 and 380 km while providing sub-meter spatial resolutions. In this research, the magnetic attitude control system for SHAPE is defined. A magnetorquer design has been proposed and verified through numerical simulations in COMSOL Multiphysics, taking nonlinear magnetization effects of the ferromagnetic core into account. In addition, the performance of the magnetorquer is verified by an experiment. A Nonlinear Dynamic Inversion (NDI) controller with Time Scale Separation is proposed to provide the control input to the magnetorquers, a control technique which allows linear control feedback design to a nonlinear system.