118 / 2016-04-28 14:51:18

Disturbance-Observer-Based Composite Attitude Stabilization of Flexible Spacecraft

disturbance observer ,variable structure,satellite attitude control ,LMI,flexible spacecraft

Abstract—In this paper, a disturbance-observerbased
composite attitude controller is proposed for
attitude control and stabilization of flexible
spacecraft. This approach is composed of two parts.
Firstly, a disturbance observer is designed to
estimate the disturbance from the flexible
appendages. The design parameters of disturbance
observer based control (DOBC) are determined by
solving linear matrix inequality (LMI).
Subsequently, an integral sliding mode controller
(ISMC) is used to address other disturbances such
as space environmental disturbance torques,
unmolded uncertainties and noises from actuators
and sensors. Simulations results are provided to
verify the effectiveness of the proposed control
scheme.