, "People in control [Interviews with Milan Mares and Li-Chen Fu]," Control
Systems Magazine, IEEE , vol.29, no.1, pp.22-25, Feb. 2009
Abstract: Presents interviews with editors of systems-and control-related
journals worldwide.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753740&isnumber=4753726

Tan, X.; Iyer, R.V., "Modeling and control of hysteresis," Control
Systems Magazine, IEEE , vol.29, no.1, pp.26-28, Feb. 2009
Abstract: The five articles in this special issue focus on the modeling and
control of hysteresis. Hysteresis is a nonlinear effect that arises in diverse
disciplines ranging from physics to biology, from material science to
mechanics, and from electronics to economics.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753741&isnumber=4753726

Cross, R.; Grinfeld, M.; Lamba, H., "Hysteresis and economics," Control
Systems Magazine, IEEE , vol.29, no.1, pp.30-43, Feb. 2009
Abstract: The goal of this article is to explore the rationale underlying the
application of hysteresis to economic models. In particular, we explain why
many aspects of real economic systems are hysteretic. The aim is to be explicit
about the difficulties encountered when trying to incorporate hysteretic
effects into models that can be validated and then used as possible tools for
macroeconomic control. The growing appreciation of the ways that memory effects
influence the functioning of economic systems is a significant advance in
economic thought and, by removing distortions that result from oversimplifying
specifications of input-output relations in economics, has the potential to
narrow the gap between economic modeling and economic reality. Static
hysteresis input-output systems, hysterons, and Preisach models are defined,
and the form that macroeconomic models with hysteresis typically take is
described. Then some relevant economics background is sketched, and the
distinctive nature of models in economics is discussed in detail. In the
following central section of the article the results of approximately two
decades of hysteresis modeling in economics are summarized.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753742&isnumber=4753726

Appelbe, B.; Flynn, D.; Mcnamara, H.; O'Kane, P.; Pimenov, A.; Pokrovskii, A.;
Rachinskii, D.; Zhezherun, A., "Rate-Independent Hysteresis in Terrestrial
Hydrology," Control Systems Magazine, IEEE , vol.29, no.1,
pp.44-69, Feb. 2009
Abstract: The goal of this article is twofold. The first objective is to
demonstrate the role of hysteresis in hydrology. The second objective is to
describe a class of simple and convenient mathematical models of hydrological
systems with hysteresis and to briefly discuss methods for the quantitative and
qualitative analysis of such models. This article is organized as follows. In
the first section we discuss the role of the Preisach model. We then present an
explicit expression for analogues of wetting and drying curves in the Preisach
model context. The central role in this section is occupied by special
one-parameter classes of Preisach operators which are useful as models of
soil-water hysteresis for particular soils. Fitting is discussed in the context
of the GRIZZLY database of hysteretic soil-water characteristics. The second
section introduces a simple but instructive example of a differential equation
coupled with a Preisach nonlinearity. This equation serves as a basis for
modeling vegetated soil in terrestrial hydrology. The third section is
dedicated to the FEST model, where FEST stands for "fully vegetated slab
of soil with transpiring plants". This model describes drainage,
transpiration, and infiltration flows in a fully vegetated slab of soil. We
demonstrate that hysteresis effects are critical, both on qualitative and
quantitative levels, for modeling hydrological systems and flows in soil, while
theoretical analysis and numerical implementation of the models raise
interesting mathematical questions. To demonstrate the application of this
model we use rainfall data gathered in the Feale region in County Kerry, Ireland, covering a period of 19 months
between July 2002 and February 2004. The FEST model includes a quantitative
description of the dynamics of the plant biomass, which depends on the amount
and regularity of precipitation and soil type, including details of soil-water
hysteresis. Hence, the FEST model can be used as a component of ecological
system- - models. Finally, the qualitative properties of the FEST model are
discussed.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753743&isnumber=4753726

Kam Leang; Qingze Zou; Devasia, S., "Feedforward control of piezoactuators
in atomic force microscope systems," Control Systems Magazine, IEEE
, vol.29, no.1, pp.70-82, Feb. 2009
Abstract: This article describes an inversion-based feedforward approach to
compensate for dynamic and hysteresis effects in piezoactuators with
application to AFM technology. To handle the coupled behavior of dynamics and
hysteresis, a cascade model is presented to enable the application of
inversion-based feedforward control. The dynamics, which include vibration and
creep, are modeled using linear transfer functions. A frequency-based method is
used to invert the linear model to find an input that compensates for vibration
and creep. The inverse is noncausal for nonminimum-phase systems. Similarly,
the hysteresis is handled by an inverse-Preisach model. To avoid the complexity
of finding the inverse-Preisach model, high- gain feedback control can be used
to linearize the system's behavior. A feedforward input is then combined with
the feedback system to compensate for the linear dynamics to achieve high-speed
AFM imaging. Finally, recent efforts in feedforward control for an SPM
application including the use of iteration to handle hysteresis as well as
uncertainties and variations in the system model is discussed.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753744&isnumber=4753726

Iyer, R.V.; Xiaobo Tan, "Control of hysteretic systems through inverse
compensation," Control Systems Magazine, IEEE , vol.29, no.1,
pp.83-99, Feb. 2009
Abstract: Inverse compensation is a fundamental technique in the control of
systems with hysteresis. In this expository article, we present algorithms for
constructing the inverse of the Preisach operator, a hysteresis model with
application to magnetics, smart materials, terrestrial hydrology, and
economics. Adaptive inverse control is discussed for cases where hysteresis
parameters are not known precisely. To meet the demand of highly dynamic applications,
an embedded inversion approach is presented that exploits the parallelism
offered by FPGAs.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753745&isnumber=4753726

Oh, J.; Drincic, B.; Bernstein, D., "Nonlinear feedback models of
hysteresis," Control Systems Magazine, IEEE , vol.29, no.1,
pp.100-119, Feb. 2009
Abstract: In the present article we investigate multistability and hysteresis
within the context of linear systems with nonlinear feedback. For concreteness
and simplicity, we focus primarily on single-input, single-output linear
systems with companion-form realizations. For various choices of the
realization parameters, we characterize the input-output equilibria set. We
analyze this set in detail for the case of a deadzone nonlinearity, and we
determine the values of the realization parameters that give rise to
traversal-type or bifurcation-type hysteresis. The rich diversity of hysteretic
phenomena that can be generated by interconnecting a linear system with a
feedback nonlinearity is the motivation for this article.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753746&isnumber=4753726

Powers, W.F., "Lessons Learned from a Control Systems Way of Life," Control Systems
Magazine, IEEE , vol.29, no.1, pp.120-125, Feb. 2009
Abstract: The author presents ten lessons he has learned from a control systems
way of life.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753747&isnumber=4753726

Astolfi, A., "Stability of Dynamical Systems - Continuous, Discontinuous,
and Discrete Systems (by Michel, A.N. et al.; 2008) [Bookshelf]," Control
Systems Magazine, IEEE , vol.29, no.1, pp.126-127, Feb. 2009
Abstract: The goal of this book is to provide a reference text for graduate
students and researchers on stability theory for the class of systems
encountered in modern applications. This goal is achieved since the book offers
a self-contained presentation of stability theory. The book is organized in
nine chapters, most of which include sections with notes and references,
problems, and bibliography. Some of the topics covered include: the history of
stability theory; dynamical systems; invariance theory; discrete-event systems;
finite-dimensional systems; linear systems; pulse-width-modulated feedback systems;
digital filters; and stability issues for infinite-dimensional (continuous and
discontinuous) systems. The book is clearly written, and difficult concepts are
illustrated by means of good examples. The book should provide a useful
reference for researchers working in control theory as well as for Ph.D.
students.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753748&isnumber=4753726

Gu, G., "Linear Feedback Control - Analysis and Design with MATLAB (by
Dingyu Xue et al; 2007) [Bookshelf]," Control Systems Magazine, IEEE
, vol.29, no.1, pp.128-129, Feb. 2009
Abstract: There is a need for a book that contains not only control theory but
also adequate Matlab examples. This book, written primarily as a reference
book, fills this gap. The text is organized into eight chapters, which cover
modeling, analysis, simulation, and controller design. Each chapter contains
Matlab examples with short scripts and plots inserted within the text. In
addition, each chapter provides a large number of exercises that require the
use of various Matlab commands or Matlab programming. This book is useful for a
wide range of users, including beginners in the field, students who wish to
bridge the gap between control theory and the use of Matlab in the analysis and
design of control systems, and practicing engineers.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753749&isnumber=4753726

, "Cardiovascular and Respiratory Systems: Modeling, Analysis, and Control
[by Batzel, J.J. et al.; 2007) [Bookshelf]," Control Systems Magazine,
IEEE , vol.29, no.1, pp.129-131, Feb. 2009
Abstract: This book presents a technique for applying optimal control theory
and parameter estimation to the analysis of regulation processes in the
cardiovascular and respiratory systems. The book is organized into five
chapters and three appendices. Each chapter begins with an introduction to the
key physiological concepts related to the topics in the chapter. Next, a
mathematical model representing the dynamics of the physiological system of
interest is provided with a clear explanation. The model is then formulated as
a control systems problem, for analysis and parameter estimation. Clinical
applications of the model are presented as examples. The appendices summarize
control theories used in the analysis in each chapter. The text is a useful reference
book for control researchers who wish to explore applications in medicine. The
book can also be used as a textbook for a graduate-level special topic course,
although additional references in human physiology and optimal control systems
might be needed.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753750&isnumber=4753726

Angeli, D., "Ordinary Differential Equations (by Miller, R.K. and Michel,
A.N.; 2007) [Bookshelf]," Control Systems Magazine, IEEE , vol.29,
no.1, pp.131-132, Feb. 2009
Abstract: This book offers a twist for dynamical systems stability both in a
linear and nonlinear setup. The material is rigorously presented and organized
in a self-contained, yet not-too-pedantic manner. Some of the topics covered
include: initial value problem; proving solutions; oscillation theory; boundary
value problems; classical Lyapunov methods; the existence of stable and
unstable manifolds; stability of periodic solutions, the Poincare-Bendixson
theorem for planar systems, and Andronov-Hopf bifurcations. The material is
adequate for both mathematicians and engineers at the "advanced
undergraduate or graduate level," as remarked by the authors.
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4753751&isnumber=4753726