ADAPTIVE STABILIZATION OF A CLASS OF INTERCONNECTED SYSTEMS

A class of interconnected systems with time-varying state-delay and un certain parameters is considered. The uncertainties appear within each subsystem as well as in the interconnections among subsystems. Howeve r, the uncertainty bounding is unknown. Adaptive decentralized control lers based on output-feedback are developed to render the closed-loop trajectories of the interconnected system globally ultimely bounded. A ll the degn effort is undertaken at the subsystem level. The controlle rs consist of a linear component based on the nominal design and a non linear dynamic component to update the control parameters. The develop ed theory is illustrated by a simulation model of representative reach es of the River Nile. (C) 1997 Elsevier Science Ltd.