When configured for completely non-propulsive control, the CMGs provide the ISS with the micro-gravity environment that is required for science payloads. The US GN&C system uses a one-, two-, or three-axis Torque Equilibrium Attitude (TEA) seeking controller to minimize the amount of momentum required to maintain attitude control.

A control moment gyroscope (CMG) is an attitude control device generally used in spacecraft attitude control systems. A CMG consists of a spinning rotor and one or more motorized gimbals that tilt the rotor’s angular momentum. As the rotor tilts, the changing angular momentum causes a gyroscopic torque that rotates the spacecraft. [1] [2]

This paper presents an evolutionary approach in simulating a cluster of 4 Control Moment Gyros (CMG) on the International Space Station (ISS) us-ing a common sense approach (the agile development method) for concurrent mathematical modeling and …

CMG Thruster Assist (CMG TA) mode. – This is currently the primary mode for ISS. – CMG TA consists of using the CMGs until momentum gets too high, then the thrusters will pulse to help re-align ISS momentum. Direct handover to thruster control is also an option if large perturbations are observed. Orbiter Deadband Collapse

This paper describes the configuration of the ISS CMGs, historic heritage, the on-orbit failure, and corresponding root cause analysis. CMG CONFIGURATION The four CMGs operate as momentum storage devices that exchange momentum with the ISS through induced gyroscopic torques created by a motor-driven constant-speed momentum

In the last years, Control Moment Gyros (CMGs) are widely used for high-speed attitude control, since they are able to generate larger torque compared to “classical” actuation...

The CMG momentum desaturation method developed by Draper Laboratory for the International Space Station for use during robotic payload operations is presented. A frequency optimal feed-forward thruster pulsing strategy that is independent of plant

2020年4月24日 · The three SAMS sensors used for analysis here all registered the CMG desat-uration thruster firing event, but to differing degrees and with slightly different characteristics ostensibly due to geometry and the fact that the ISS is not a rigid body. Furthermore, it was shown the as-measured (200 Hz) data can significantly

control moment gyroscope (CMG) is a momentum- storage device used to control spacecraft attitude. Angu-lar momentum of a fixed magnitude is generated by spinning a rotor...

This paper describes the Space Station Double Gimbal Control Moment Gyroscope design, on-orbit telemetry signatures and a summary of the results of both failure investigations. The lessons learned from these combined sources have lead to improvements in the design that will provide CMGs with greater reliability to assure the success of the ...