Robust Adaptive Output-Feedback Tracking for a Class of Nonlinear Time-Delayed Plants

摘要

Within the model reference adaptive control (MRAC) framework, a continuous adaptive output-feedback control scheme is developed for a class of nonlinear SISO dynamic systems with time delays which is robust with respect to unknown time-varying plant delays and to an external disturbance with unknown bounds. A special form of the Lyapunov-Krasovskii functional with a “virtual” adaptation gain vector is introduced to prove stability.