Sampled-Data Delayed Output Feedback Control of a Class of Nonlinear Systems

This letter presents a sampled-data control strategy for robust stabilization of a family of uncertain nonlinear systems via delayed output signals. Instead of building dynamic observers, we use an output signal sampled at the current time and delayed output measurements at the previous n - 1 sampling points to design sampled-data controllers, which are easier for implementation by computer. Under a linear growth condition, it is proved that global robust stabilization is achievable by sampled-data delayed output feedback. The robust stability analysis of the hybrid closed-loop system with delays is conducted by the Lyapunov-Krasovskii functional method.