Summary: IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 43, NO. 4, APRIL 1998 457
Hybrid Control Systems: An Introductory
Discussion to the Special Issue
Abstract-- This introductory paper provides an overview of
hybrid systems and gives a brief introduction to the major ap-
proaches in hybrid systems research with several book references.
A brief guide for the papers in this special issue, which present
several approaches to modeling, analysis, and synthesis of hybrid
systems, is also given.
I. THE HYBRID NATURE OF HYBRID SYSTEMS
HYBRID means, in general, heterogeneous in nature or
composition. The term hybrid systems is understood to
mean systems with behavior defined by entities or processes
of distinct characteristics. The hybrid systems of interest
here are dynamic systems where the behavior of interest is
determined by interacting continuous and discrete dynamics.
These systems typically contain variables or signals that take
values from a continuous set (e.g., the set of real numbers)
and also variables that take values from a discrete, typically