Global practical tracking for a class of nonlinear systems via linear sampled-data control

This paper considers the problem of global practical tracking via state feedback sampled-data control for a class of uncertain nonlinear systems. Under a lower-triangular linear growth condition, a sampled-data state feedback controller is constructed such that the states are globally bounded and the error between the system output and the reference signal will be rendered smaller than a given tolerance. The proposed state feedback sampled-data controllers are linear and can be easily implemented in practice.