Method and system for imposing a momentum boundary when changing the direction of an agile vehicle using a control moment gyroscope

摘要

Methods and systems are provided for reorienting an agile vehicle (114), such as a satellite or spacecraft, using a control moment gyroscope (CMG) array (110). The CMG array (110) comprises a plurality of CMGs onboard the agile vehicle (114). A method comprises obtaining an input torque command for reorienting the vehicle using the CMG array (110) and, when the angular momentum of the CMG array (110) violates or is approaching a momentum boundary (300) criterion, decreasing the input torque command in the kinetic momentum direction, resulting in a modified torque command, and operating the CMG array (110) using the modified torque command.