Torque distribution of the Integrated Magnetically Suspended Inertia Actuator for attitude maneuvers

The Integrated Magnetically Suspended Inertia Actuator (IMSIA), composed of three orthogonal fixed Magnetically Suspended Flywheels (MSFWs) and a Double Gimbal Magnetically Suspended Control Moment Gyros (DGMSCMG), can provide long-term high-precision torque and instantaneous great torque simultaneously. To reduce the electrical energy consumption, a novel torque distribution strategy yielding power optimization is investigated. The proposed scheme adopts the kinetic energy variation of the IMSIA as the cost function and obtains the distribution instructs of the actuators without changing the total torque of the IMSIA. Numerical simulation and tabletop hardware-in-the-loop simulation are carried out to verify the effectiveness of the new strategy. The results show that the new method obviously reduces the energy consumption compared with the traditional minimum-torque strategy.