Actuators
Abstract
Actuators for attitude control as well as for on-station orbital corrections are reviewed. Two types of satellite equipment are considered: (1) thrusters which generate forces by varying the quantity of mass ejected into space, and (2) inertia wheels, either of the kinetic or reaction type, which provide torque by momentum transfer to the satellite structure. The concept specific impulse is defined, leading to the characterization of the most common chemical and electric thrusters. The problem of storage and use of liquid fuels under weightless conditions is also summarized. The advantages and disadvantages of inertia wheels are discussed. Bearing technology relative to their use is emphasized.
- Publication:
-
Space Vehicle Orbital Motion
- Pub Date:
- 1980
- Bibcode:
- 1980svom.nasa..349M
- Keywords:
-
- Actuators;
- Chemical Reaction Control;
- Counter-Rotating Wheels;
- Reaction Wheels;
- Satellite Attitude Control;
- Thrust Control;
- Bearings;
- Electric Propulsion;
- Hydrazine Engines;
- Momentum Transfer;
- Specific Impulse;
- Astrodynamics