Sumários
Propulsion systems (II)
5 Dezembro 2023, 08:00 • André Maria da Silva Dias Moitinho de Almeida
- The rocket equation
- Effects of rocket nozzle expansion\
- Chemical propulsion
Propulsion systems (I)
30 Novembro 2023, 11:30 • André Maria da Silva Dias Moitinho de Almeida
:: Introduction
- Propulsion purposes and requirements
- Types and comparison of propulsion systems
ESA Project (II)
28 Novembro 2023, 09:00 • André Maria da Silva Dias Moitinho de Almeida
- 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 (III)
28 Novembro 2023, 08:00 • André Maria da Silva Dias Moitinho de Almeida
- External: gravitational gradients, solar pressure, magnetic, dragging etc.
- Internal: misalignments, movements of appendages, movements of liquids, etc.
- Secular
- 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 (II)
23 Novembro 2023, 11:30 • André Maria da Silva Dias Moitinho de Almeida
:: Determination of attitude
- Sensors (introduction)
- Estimation and calculations
- Representation of attitude: Euler angles, cosine directors, quaternions
- Gravity gradient stabilization
- Mono-axial, dual-spin
- Tri-axial rotation