IAA-AAS-DyCoSS2-14 -07-06 ATTITUDE CONTROL OF A SPACECRAFT WITH A DOUBLE-GIMBAL VARIABLE-SPEED CONTROL MOMENT GYRO VIA LPV CONTROL THEORY

In this paper, we analyze dynamics of a DGVSCMG(Double-Gimbal VariableSpeed Control Moment Gyro) and develop an easy-to-use LPV (Linear ParameterVarying) model, in which we deal with 3-axis attitude control of a spacecraft equipped with a DGVSCMG. Although it is hard to consider overall stability and control performance of attitude control at the same time with conventional methods, this paper attains both of them via LPV control theory, while newly introducing an interesting PDCT (Parameter-Dependent Coordinate Transformation) as well as a virtual state variable. Through a numerical example, we demonstrated the efficiency of the proposed method to compare with a conventional method.