Decentralized output feedback control for nonlinear similar large-scale composite systems with unmatched uncertainties

In this paper, nonlinear similar large-scale composite systems, in which the unmatched uncertainties not only appear in the isolated subsystems but also appear in the interconnections, are discussed. A kind of nonlinear decentralized output feedback controllers easy to be designed for the systems are proposed, and the relations between the control gain, the uncertain bounds and stabilized domain are presented. Finally, numerical simulation shows that our result is effective.