OlGlTAL SIGNAL PROCESSING. By F. Nekoogar and G. ... view on digital control using DSP, with a good balance of ... compares digital and analog control sys-.
OlGlTAL CONTROL USING OlGlTAL SIGNAL PROCESSING By F. Nekoogar and G. Moriarty. Prentice Ilall, 1999,430pages. (ISBN0130891037) Overall, this book is an excellent combination of theoretical subject matter and practical applications in t h e area of DSP-based control system design. The authors have maintained the balance ofacademic and industrial contents in a very practical sense, supported with ample worked examples and problems. The book covers the essentialsoftheory and applications, directly making use of software packages such as MATLAB and MATRIXx for real-world problem solving. Chapter 1 commences with a good overview on digital control using DSP, with a good balance of qualitative, quantitative, and applications information to generate reader interest. In addition, this chapter compares digital and analog control systems, allowing experienced analog readers to switch their mindset over to DSP-based digital control systems. Mathematical techniques of discrete systems, a good account of using Z transform techniques, and mapping relations h i p s between s- a n d z-planes a r e presented in Chapter 2. A large number of numerical examples for students, supplemented by appropriate appendices, make it an excellent tutorial for undergraduate and graduate students. Chapter 3 presents an excellent mathematical treatment on discrete systems analysis. Readers can gain a clear mathematical picture of analytical approaches and the need for various stability criteria and sensitivity analysis, etc. Some useful theories and slability methods, such as Routh-l-lurwitz, Jury Test, and Lyapunov, etc., are practically presented. However the chapter lacks a good practical overview on sampled data systems and real-world
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[IRCUIIS 8 DEVICES
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ADC-IIAC techniques as applied to modern data-converter IC families. Chapter 4 details the tools and techniques for designing control systems, indicating how analog experiences can be used as a basis for digital control system design. It rea^ sonably refreshes the mind of a person who has only a little memory of analog control theory. An excellent practical approach to usingMATLAB for designofcontrolsystems is presenled. The given list of problems could consolidate the design approach for a novice engineer in a mathematical sense. Chapter 5 is an excellent industrial applications collection that provides a sulficient amount of miscellaneous applications, rules ofthumb, and device comparisons. It also provides a good overview of development approaches and tools. It appears to be prepared by using a large amount of application notes and design bullelins of DSP chip manufacturers and development tool vendors. Chapter 6 is an excellent illustrative work with sufficient industrial examples and modeling of systems with observability and controllability, etc. Pole-placement problems, state estimator problems, and the use of commercial software such as MATLABISIMULINK are considered with sufficient real-world examples. An introduction to fuzzy-logic control makes the chapter complete in modern design approaches. The book as a whole presents an excellent use of worked examples with sufficient tutorial problems to solve in order to consolidate the theoretical considerations for students. The authors have creatively used a set of appendices to present the eSsrntials of mathematical tools and CAE package details in an elegant manner. Overall, it is a great contribution by an academicIindustrial engineer combination for the fast-growing DSP systems world. -Nihal Kularatna ..,.
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PRINCIPLES OF SUPERCONDUCTIVE OEUICES A N 0 CIRCUITS By T. van Duzer and C. Turner. Prentice Hall, 1999,458 pages. (ISBN 0132627426) In recent years, the words "solid-state technology" have come to mean "semiconductor technology." While it is true that semiconductor technology has an overwhelming presence, it should not be forgotten that superconductor technology remains very important for certain significant applications. For example, superconductingmagnets are the basisofmuchvey sensitive but noninvasive medical diagnostic equipment. A number of private and publicly traded companies provide components and equipment based on superconducting materials and technology. Thus, the updated second edition of the 19x1 staple reference Principles o f Superconductive Deuices and Circuits appears at a good time. While the bulk of the text remains the same, a significant a m o u n t of material has been added, largely due to the discovey of high-temperature superconducting materials in 1986 and their subsequent introduction into real applications. In addition, it is quite clear that in this second edition the authors put greater emphasis on the technologically important applications of superconducting devices. Of particular note to those familiar with the first edition, Chapter 4 has been expanded to contain more information on Josephson junction devices, Chapter 5 considers many more circuit applications, andanew Appendix C has been added that contains information on downloadable simulation programs relating to superconductive circuit design. Chapter 1 covers the basic solid-state physics of superconducting materials, while Chapter 2 deals with the micro-
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