Adaptive Robust Stabilization of a Class of Time-Delay Uncertain Systems

For a class of time-delay uncertain systems with bounded unmatched perturbations in which the upper bounds of the uncertainties are unknown, robust controllers are designed based on the estimated values, to guarantee the robust stability of the closed-loop systems up to uniform ultimate boundedness. Sufficient condition is given to ensure robust stability of closed-loop systems. Simulation result verifies the correctness of the conclusion.