On the sampled-data input-to-state stabilization of passive systems

The problem of sampled-data input-to-state stabilization of nonlinear passive systems is considered. Under the assumptions of existence of globally defined normal form and the input-to-state stability (ISS) of internal dynamics, we show that the system is semiglobally input-to-state stabilizable with assignment of the prescribed ISS gain using sampled-data output feedback.