In this paper, we deal with complete attitude control of spacecraft with multi-MEDs (Momentum Exchange Devices). In particular, we focus on the case of RWs (Reaction Wheels). Although it is hard to consider overall stability and control performance of attitude control at the same time with a conventional method, this paper presents a unique method to realize attitude control while taking into account both of them at the same time. To this end, we shall introduce a virtual state variable and a coordinate transformation matrix. Both of them allow us to design a controller to a simple LPV (Linear Parameter-Varying) model, which is covered with fewer vertices. The controller designed to the simple model guarantees overall stability and control performance of the original plant by getting back the coordinate transformation. Through numerical simulations, the effectiveness of the proposed method is demonstrated.
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