Analysis and attenuation of disturbance torque in control moment gyro gimbal servo systems

This paper presents an interference eliminator designs based on adaptive inverse control for gimbal servo system of magnetically suspended control moment gyro. This approach treats dynamic control of plant as a separate problem from that of control of plant disturbance by adopting the structure of adaptive inverse control and considers the interference effects of the nonlinear friction disturbing moment, the coupling moment caused by high speed magnetic suspend rotor and velocity change of gimbal system and the parametric variation by changing the attitude of the spacecraft to gimbal control performance. Based on the suggested adaptive inverse control interference eliminator design, the controller may be much better to improve the gimbal servo control system performance than conventional interference inverter. Simulation validations show that the proposed interference eliminator can suppress disturbed moment and has excellent robust capability.