Major components of an attitude control subsystem

  1. Which frequency would be better to use for a remote sensing spacecraft: 7.5 x 1013 Hz
    or 1.03 x 1014 Hz? Why?
  2. Given a payload mass of 75 kg, estimate the spacecraft’s total mass and volume.
  3. Describe the two major components of an attitude control subsystem – i.e. actuators
    and sensors, and provide three examples of each.
  4. Describe the three common momentum control devices. What are their main
    differences?
  5. What are disturbance torques and how do they affect a spacecraft? Calculate orders of
    magnitude, rank order them and discuss their relative influence for a:
    i. LEO satellite
    ii. GEO satellite
  6. Given a payload mass of 75 kg, estimate the spacecraft’s total mass and volume. 2. Describe
    the two major components of an attitude control subsystem – i.e. actuators and sensors, and
    provide three examples of each. 3. Describe the three common momentum control devices.
    What are their main differences? 4. What are disturbance torques and how do they affect a
    spacecraft? Calculate orders of magnitude, rank order them and discuss their relative influence
    for a: i. LEO satellite ii. GEO satellite 5. What is momentum dumping? When and why is
    momentum dumping needed?

Sample Solution

ACED ESSAYS