H2 optimal control solution for a combined energy and attitude control system

This addendum is an extension of a series of research work on the combined energy and attitude control system (CEACS) for small satellites. Previous works appeared in Acta Astronautica showed that the CEACS is able to simultaneously perform the attitude control and energy storage task. This addendum focuses on the CEACS attitude control enhancement by employing the H-2 optimal control method. Governing equations describing the CEACS H-2 attitude control architecture are established. Numerical treatments are performed in order to validate the attitude control option. (C) 2012 Elsevier Ltd. All rights reserved.