An LMI Condition for the Robustness of Constant-Delay Linear Predictor Feedback with Respect to Uncertain Time-Varying Input Delays
Provides a theoretical robustness guarantee for predictor feedback controllers used in systems with uncertain time-varying delays, which is an incremental contribution to control theory.
The paper derives an LMI-based sufficient condition for exponential stability of predictor feedback systems under uncertain time-varying input delays, and extends the result to a class of infinite-dimensional boundary control systems.
This paper discusses the robustness of the constant-delay predictor feedback in the case of an uncertain time-varying input delay. Specifically, we study the stability of the closed-loop system when the predictor feedback is designed based on the knowledge of the nominal value of the time-varying delay. By resorting to an adequate Lyapunov-Krasovskii functional, we derive an LMI-based sufficient condition ensuring the exponential stability of the closed-loop system for small enough variations of the time-varying delay around its nominal value. These results are extended to the feedback stabilization of a class of diagonal infinite-dimensional boundary control systems in the presence of a time-varying delay in the boundary control input.