Sumários
Attitude Determination and Control Systems (IV)
7 Dezembro 2021, 08:00 • André Maria da Silva Dias Moitinho de Almeida
:: Sensors and actuators
- Types of sensors (Earth, Sun, stellar, inertial, magnetic, GPS)
- Types of passive actuators (rotation, gravity, magnetic, shock absorbers)
- Types of active actuators (reaction wheels, gyros, propellers, magnetic torque rods)
Attitude Determination and Control Systems (III)
2 Dezembro 2021, 08:00 • André Maria da Silva Dias Moitinho de Almeida
:: Control strategies
- Gravity gradient stabilization
- Mono-axial, dual-spin
- Tri-axial rotation
- External: gravitational gradients, solar pressure, magnetic, dragging etc.
- Internal: misalignments, movements of appendages, movements of liquids, etc.
- Secular
ESA Project (II)
30 Novembro 2021, 09:00 • André Maria da Silva Dias Moitinho de Almeida
- Detailed overview of two calls (selected by the class)
“New ideas for how space can boost Europe's green future”
“New Ideas for the Commercial Use of ESA's Inventions”
- Presentation from each group – 10 min followed 5 min discussion
Presentation of idea
Problem to be addressed
Solution and concept for problem
Innovation point
Draft Work break down structure
- Definition of Action Items for each group for next class.
Attitude Determination and Control Systems (II)
30 Novembro 2021, 08:00 • André Maria da Silva Dias Moitinho de Almeida
:: Determination of attitude
- Sensors (introduction)
- Estimation and calculations
- Representation of attitude: Euler angles, cosine directors, quaternions
Attitude Determination and Control Systems (I)
25 Novembro 2021, 08:00 • André Maria da Silva Dias Moitinho de Almeida
:: What is an Attitude Determination and Control System (ADCS)
- What is attitude?
- Why determine and control?
- Requirements and constraints
- Control loop