H-infinity control of a gravity gradient stabilised satellite

This paper describes the attitude control of a small gravity gradient and r eaction wheel stabilised satellite. Gravity gradient stabilised satellite h ave limited stability and pointing capabilities. Thus, H-infinity control h as been applied, in order to improve the accuracy of the attitude control. The synthesis of a suitable H-infinity controller, using a composite weight ing function is described. The trade-off between reaction wheel torque and possible disturbance rejection capability using H-infinity control is discu ssed. Also, the promising results using H-infinity control with antireset w indup compensation are presented. (C) 2000 Elsevier Science Ltd. All rights reserved.