Robust attitude control of flexible spacecraft with quality characteristic parameter uncertainty

In this paper, the robust attitude controller designed for flexible spacecraft with quality characteristic parameter uncertainty is studied. The problem about satellite attitude control is transformed into a standard H_∞ control problem through approximate linearization method, finally the dynamic output feedback controller can be designed by using variable substitution method, which can transform nonlinear matrix inequalities into linear ones that are easy to be solved by LMI toolbox. The simulation results show that the controller has strong robustness and can adapt to biggish quality characteristic parameter uncertainty and overcome both internal and external disturbances well. This paper has some referential value in achieving very accurate and stable satellite attitude control.