ROBUST ATTITUDE CONTROL OF ETS-VIII SPACECRAFT VIA SYMMETRIC CONTROLLER

This paper studies the robust attitude control of large Geo-synchronous communication satellite ETS-VIII. After describing its model features and control issues, a candidate of robust controller design method is proposed. The controller has the form of two-degrees-of freedom control in order to satisfy both specifications of disturbance attenuation and attitude maneuver. The feedback control employs the symmetric controller having the salient robust stability property irrespective of the plant parameters. Its optimization scheme in the H∞ norm sense is discussed. Finally, the on-orbit control experiment plan is shown with some simulation results.