Parametric control for flexible spacecraft attitude maneuver based on disturbance observer

Abstract

This paper considers the problems of control performance degradation caused by the vibration of flexible accessories and external disturbance during the attitude maneuvering process of flexible spacecraft. A parametric design method for attitude maneuver control (AMC) of flexible spacecraft based on disturbance observer is proposed to improve the anti-interference ability and control accuracy of the control system. Firstly, considering the spacecraft kinematics model for quasi-linear system modeling then design a disturbance observer to solve the external disturbance and vibration generated by the flexible attachment during maneuvering. Further, a controller designed using direct parametric method is proposed that can transform the nonlinear closed-loop system into a second-order linear constant system with the desired characteristic structure and provide all degrees of freedom in the control system design. Finally, numerical examples are given to evaluate the efficacy of the proposed approach.