It is difficult to overstate the importance of considering control constraints in control system design: such constraints have well-known implications for the behaviour of the resulting closedloop system, and ignoring these constraints can lead to a dramatic loss of performance and, potentially, stability. It is therefore not surprising that papers addressing these issues have populated the literature for many years, although the number of books largely devoted to constrained control systems is rather small. Notable exceptions are [1][2][3], although none of these works consider perhaps the most common way of addressing control constraints: anti-windup compensation.The subject of this review is the first and, so far, only, book to address the topic of anti-windup compensation, and it is authored by two eminent authorities in the field. Professors Glattfelder and Schaufelberger are regular contributors to the anti-windup literature and accomplished practical control engineers; it is this background which influences the style and tone of the book. In addition to input (control) constrained systems, the book treats systems having their outputs constrained in a similar manner. The approach adopted for the treatment of this topic is 'override' control, which is akin to anti-windup compensation for the constrained outputs rather than the constrained inputs. The authors are in the minority of academics who consider this important control engineering problem and it is the consideration of this topic which, perhaps, distinguishes the book above anything else.The book is essentially split into two parts: the first part covers PI control of dominant first order systems; the second part generalizes the concepts of the first to plants of higher order with more complex controllers and also lays the foundations for multivariable anti-windup/override control.An interesting feature of the book is the 'inductive' approach which the authors adopt; rather than starting from a general treatment of the problem, the authors prefer to point out the key features of their ideas using relatively simple systems at first and then extend these ideas to more complex systems. This strategy accounts for the first part of the book, where only first order systems under PI control are considered, and it works rather well. In the first part, the concepts of anti-windup, override control and simultaneous anti-windup and override control are introduced for systems with, respectively, input, output and input and output constraints. The emphasis in these chapters is on the architecture of the antiwindup/override controllers and a useful practical strand is developed as the authors describe and group various techniques which are currently in use in industry. The main goal of these chapters is to introduce the reader to the concepts associated with the design of such compensators and how the choice of the parameters associated with the antiwindup compensators/override controllers affects the transient response of the system.In the second part of the book,...

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This paper describes a feature modelling technique aimed at modelling the software assets behind a product family. The proposed technique improves upon traditional feature modelling approaches in five respects. First, it proposes a feature meta-model that removes ambiguities found in earlier metamodels. Second, it offers a natural way to express complex composition rules for the features. Third, it offers a means to decompose large feature diagrams into extensible and self-contained modules. Fourth, it defines an XML-based approach to expressing the feature models that offers a low-cost path to the development of support tools for building the models. Fifth, it explicitly supports both the modelling of the product family and of the applications instantiated from it. The paper presents the feature modelling technique in the context of an ongoing project to build a generative environment for family instantiation. Experience from two cases studies is discussed at the end of the paper.