Observer-Based Sampled-Data Control for A Class of Nonlinear Systems

We study the observer-based sampled-data output feedback controller design for a class of nonlinear systems. Firstly, a sampled-data state observer is designed to estimate the unknown system states. Afterwards, the sampled-data output feedback controller is obtained based on the delay-dependent control method. The system stability analysis is performed by using linear matrix inequalities (LMIs) based on the Lyapunov- Krasovskii method. Results indicate global exponential stability of the closed-loop system. At last, a simulation example is given to verify the proposed control strategy.