Adaptive Output Feedback Control for Nonlinear Interconnected Time-Delay Systems Subject to Global Performance Constraint

This article considers the prescribed performance tracking problem for a class of nonlinear interconnected time-delay systems, in which system states are unavailable and each subsystem is subject to unmodeled dynamics. Based on a novel performance function, the effect of initial values is eliminated in the prescribed performance method and the dynamic surface control method is employed to avoids the complexity explosion problem. With the reduced-order observer and fuzzy logic system, decentralized adaptive fuzzy output feedback control approach is proposed and the output feedback control strategy is further explored concerning global tracking performance constraint provided that the nonlinear time-delay functions are known or satisfy other mild assumptions. A numerical simulation is provided to substantiate our method.