Spacecraft attitude maneuver control considering uncertain parameters

In order to deal with the nonlinear control issue of spacecrafts with uncertain parameters in large angle attitude maneuver, a novel method based on decentralized guaranteed cost control was adopted. As researching object is rigid spacecraft in large angle attitude maneuver, the effects of the flexible modes of the spacecraft was neglected. The spacecraft with uncertain parameter was modeled and the spacecraft attitude dynamic model was transformed into three parts to integrate decentralized controller by using feedback linearization method. Guaranteed cost control method was added to reduce the level of uncertainty and meet the requirement of the performance index. The simulation results show that the designed controller ensures that the spacecraft can complete large angle attitude maneuver accurately even under the effects of uncertainty. Therefore, the proposed controller is proved to be effective. © 2016, Harbin University of Science and Technology Publication. All right reserved.