Trends in nonlinear control

The goal of this tutorial is therefore to illustrate three research themes that have undergone substantial developments in the past few years, and to highlight related open problems and possible avenues for future research. The paper is organized as follows. Section II discusses the role of invariant manifolds in nonlinear control design, with special attention to the problem of global observer design; Section III presents recent advances in the theory of hybrid systems, finally nonlinear digitally controlled systems are discussed in Section IV.