Session
Technical Session X: Advanced Technologies III
Abstract
Multi-ton Earth-observing spacecraft have traditionally used control moment gyros (CMGs) to store momentum and to generate the large torques required for fast slew maneuvers. Small 3-axis controlled satellites, by contrast, will typically use cheaper and simpler reaction wheels to perform the same functions. The question then arises: which actuator is better suited for an Earth-observing mission? This paper compares the performance of each actuator subject to identical agile pointing requirements, and identifies the operating conditions in which one actuator outperforms the other.
Presentation Slides
Comparison of Control Moment Gyros and Reaction Wheels for Small Earth-Observing Satellites
Multi-ton Earth-observing spacecraft have traditionally used control moment gyros (CMGs) to store momentum and to generate the large torques required for fast slew maneuvers. Small 3-axis controlled satellites, by contrast, will typically use cheaper and simpler reaction wheels to perform the same functions. The question then arises: which actuator is better suited for an Earth-observing mission? This paper compares the performance of each actuator subject to identical agile pointing requirements, and identifies the operating conditions in which one actuator outperforms the other.
