Output Feedback Prescribed Performance Control for time delay Interconnected Systems with Unknown Control Directions

This paper investigates the problem of decentralized output feedback prescribed performance control for a class of interconnected systems with unknown control directions, unmodeled dynamics and time-delays. Based on the linear matrix inequalities technique, a full-order filter is designed. Then through the backstepping method, the output feedback controller is constructed to guarantee the stability of the systems with the prescribed performance. Finally, simulation results are presented to illustrate the effectiveness of the proposed method.