This paper provides an overview of recent developments on design of hybrid
controllers for continuous-time control systems that can be described by li
near or nonlinear differential stale equations. Hybrid controllers provide
a generalization of classical feedback controllers for linear and nonlinear
systems. The benefit of hybrid controllers, that they can be used to achie
ve closed-loop performance objectives that cannot be achieved using classic
al linear or nonlinear controllers, is emphasized. This paper introduces hy
brid controllers in the form of a switching control architecture and provid
es a summary of recently developed control approaches that utilize this con
trol architecture. We provide a conceptual framework for these results, ide
ntify limitations of the results, and discuss the current status of hybrid
control design approaches.