The precise control of a double gimbal MSCMG based on modal separation and feedback linearization

In order to achieve the rapid mobility and accurate attitude positioning of the spacecraft, the precise control of the double gimbal magnetically suspended control moment gyroscope (DGMSCMG) with good robust performance is of the great necessity. Meanwhile, DGMSCMG is a multivariable and strongly nonlinear dynamic system, which presents the challenging control issue. According to the physical characteristics of DGMSCMG, this paper proposes a simplified feedback linearization strategy based on modal separation approach, which also cooperates with the phase compensation filter to minimize the negative influence of unmolded dynamics. The simulation results show that the proposed control method is a promising approach with nice robustness and desirable decoupling performance.