Modern methods of filter design and controller design often yield
systems of very high order, posing a problem for their implementation.
Over the past two decades or so, sophisticated methods have been
developed to achieve simplification of filters and controllers. Such
methods often come with easy-to-use error bounds, and in the case of
controller simplification methods, such error bounds will usually be
related to closed-loop properties.
This book is the first comprehensive treatment of approximation methods
for filters and controllers. It is fully up to date, and it is authored
by two leading researchers who have personally contributed to the
development of some of the methods. Balanced truncation, Hankel norm
reduction, multiplicative reduction, weighted methods and coprime
factorization methods are all discussed.
The book is amply illustrated with examples, and will equip practising
control engineers and graduates for intelligent use of commercial
software modules for model and controller reduction.