
Saunder January 22, 2014 10:43 K15053˙Book
Chapter 1
An Overview
1.1 Introduction
Disturbances widely exist in modern industrial control systems and bring adverse
effects to the performance of control systems. Therefore, disturbance rejection is one
of the key objectives in controller design. In this book, the disturbances refer to not
only the disturbances from the external environment of a control system but also
uncertainties from the controlled plant including unmodeled dynamics, parameter
perturbations, and nonlinear couplings of multivariable systems, which are difficult
to handle [19].
In the process control community, especially in petroleum, chemical, ...