Control with Sample-Data Measurements

In this chapter, we formulate our main problem and discuss some necessary mathematical concepts related to feedback control design for nonlinear systems under sample-data output measurements. Then we present a theoretical analysis of an extended version of the invariant ellipsoid method. Then two feedbacks are analyzed: a linear feedback proportional to the current state estimate obtained by a Luenberger-type estimator; and a full-order linear dynamic controller governed by a linear ordinary differential equation with available sample data as input.