Abstract
In this paper, we consider attitude control of flexible spacecraft via passivity-based control method. Although passivity-based control is known as one of the promising control methods for flexible spacecraft, it has the limitation in the control performance since the control law is static output feedback with scalar gain. Therefore, we extend it to the control law having matrix gains, in order to facilitate fine-tuning capability for control performance. Based on the results, we further extend it to the dynamic controller without velocity measurement. Effectiveness of the control methods is verified by simulations.