Y. Guo
Large-scale systems, decentralized control, time-delay, nonlinearcontrol, backstepping
The problem of decentralized disturbance attenuation is considered for a new class of large-scale nonlinear systems with delayed state interconnections. This class of large-scale time-delay systems broadens most existing classes of large-scale time-delay systems in that the uncertain interconnections are bounded by general nonlin- ear functions instead of linear or polynomial-type functions. It is shown that by decentralized memoryless state feedback control, the closed-loop system achieves internal global asymptotical stability in the sense of Lyapunov and external stability in the sense of L2 gain. Nonlinear Lyapunov-Krasovskii functionals are constructed that render the linear and polynomial-type growth conditions on the interconnections as special cases.
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