Research on attitude control and momentum management of space station based on extended state observer

The space station employ control moment gyro (CMG) as a primary actuator. But it will cause the accumulation of angle momentum and result in the saturation, because of the environmental disturbance torques. The attitude control and momentum management (ACMM) of the space station is to avoid the rapid saturation of CMG and satisfy the accuracy of attitude control. A LQR controller is designed based on the linearized model of the ACMM; extended state observer (ESO) is utilized to estimate the disturbance of the space station for the first time. An effective disturbance compensation strategy for the space station is presented to satisfy the ACMM and accuracy of attitude control. Finally, the simulation proves the feasibility of the method.