NONLINEAR PREDICTIVE ATTITUDE CONTROL OF SPACECRAFT UNDER EXTERNAL DISTURBANCE

Predictive control technique is applied to the three-axis attitude control of spacecraft. The principal idea of predictive control is to construct a priori reference trajectory and build control command so that the actual system follows the reference trajectory. In the case of this study, the controlled variables are the quaternion attitude parameters and angular rates of spacecraft body axes. The key objective of this paper is to design a predictive controller for the three-axis attitude control under external disturbances. Designing a predictive control law including disturbances and estimation of the disturbance are discussed. Conventional predictive controller design approach has been partially modified in conjunction with disturbance identification strategy. The results of this paper, attitude control simulation results, are presented to prove this research. Copyright © 2002 IFAC