DECENTRALIZED ROBUST CONTROLLER-DESIGN FOR A CLASS OF INTERCONNECTED UNCERTAIN SYSTEMS - WITH UNKNOWN BOUND OF UNCERTAINTY

In this paper, a simple decentralized robust control scheme is propose d for a class of interconnected time-varying systems with uncertaintie s. The uncertainties may appear in the interconnections between the su bsystems and also within the subsystems, and they are possibly nonline ar and time-varying, The uncertainties are hounded, but the bounds of the uncertainties are unknown in controller design, When certain match ing conditions are satisfied for the uncertain interconnections and th e uncertainties within the subsystems, the proposed decentralized cont rol scheme guarantees the controled system to converge exponentially w ith a prescribed degree toward the equilibrium of the system, or a res idual hall around the equilibrium.