Bin Jiang

This book takes two effectiveness challenges in the data warehousing field in focus. The first and the primary one is a practical challenge. With the approach introduced in this book, data warehouse construction should become substantially cheaper, faster and safer than it is today. The key for this effectiveness is the striking compactness of the approach. The second and the secondary one is a conceptual challenge. With the concise discussions around several fundamental concepts, thinking and discussing in this field should become more effective than it is nowadays. This book covers all major areas of data warehouse construction. It is introduced by a data warehouse definition and its context, four classifications, five categories of fifteen requirements, and a review of two methodologies and three constructional approaches. Along a sophisticated reference architecture, plenty of design issues, twenty-one design recommendations, eight practice recommendations, seven design principles, twenty-seven generic algorithms and techniques, twelve metadata-driven generic operators, seven working procedures, four paradigmatic foundations and the paradigm principle itself are presented systematically. There are thirty-five constructional exercises included in the book. If you have completed them during the reading, you have laid a solid fundament of a sophisticated generic data warehouse before you close the book. Otherwise, you can find the solutions in my next book of this series, i.e., "Realizing Generic Data Warehouses by Generic SQL Programming."

This book presents up-to-date research and novel methodologies on fault diagnosis and fault tolerant control for switched linear systems. It provides a unified yet neat framework of filtering, fault detection, fault diagnosis and fault tolerant control of switched systems. It can therefore serve as a useful textbook for senior and/or graduate students who are interested in knowing the state-of-the-art of filtering, fault detection, fault diagnosis and fault tolerant control areas, as well as recent advances in switched linear systems.

This book provides its reader with a good understanding of the stabilization of switched nonlinear systems (SNS), systems that are of practical use in diverse situations: design of fault-tolerant systems in space- and aircraft; traffic control; and heat propagation control of semiconductor power chips. The practical background is emphasized throughout the book; interesting practical examples frequently illustrate the theoretical results with aircraft and spacecraft given particular prominence. Stabilization of Switched Nonlinear Systems with Unstable Modes treats several different subclasses of SNS according to the characteristics of the individual system (time-varying and distributed parameters, for example), the state composition of individual modes and the degree and distribution of instability in its various modes. Achievement and maintenance of stability across the system as a whole is bolstered by trading off between individual modes which may be either stable or unstable or by exploiting areas of partial stability within all the unstable modes. The book can be used as a reference for academic research on switched systems or used by graduate students of control theory and engineering. Readers should have studied linear and nonlinear system theory and have some knowledge of switched and hybrid systems to get the most from this monograph.

Due to the increasing security and reliability demand of actual industrial process control systems, the study on fault diagnosis and fault tolerant control of dynamic systems has received considerable attention. Fault accommodation (FA) is one of effective methods that can be used to enhance system stability and reliability, so it has been widely and in-depth investigated and become a hot topic in recent years. Fault detection is used to monitor whether a fault occurs, which is the first step in FA. On the basis of fault detection, fault estimation (FE) is utilized to determine online the magnitude of the fault, which is a very important step because the additional controller is designed using the fault estimate. Compared with fault detection, the design difficulties of FE would increase a lot, so research on FE and accommodation is very challenging. Although there have been advancements reported on FE and accommodation for dynamic systems, the common methods at the present stage have design difficulties, which limit applications of respective design approaches. Therefore, the problems of FE and accommodation are needed to be further studied. This book considers the theory and technology of FE and accommodation for dynamic systems, and establishes a systemic and comprehensive framework of FE and accommodation for continuous/discrete-time systems.

Hybridsystems(HS)aredynamicalsystemsthatinvolvetheinteractionofconti- ousanddiscretedynamics. ThestudyofHSismotivatedbythefundamentally- bridnatureofmanyreallifeapplications. Overthelastdecade,signi?cantprogress has taken place in modeling and simulation, veri?cation, stability and controller synthesisforHS. Faultsinautomatedprocessesoftencauseundesiredreactionsandshut-downof a controlledplant,andtheconsequencescouldbedamagetotechnicalpartsofthe plant or to its environment. Fault diagnosis (FD) and fault tolerant control (FTC) arehighlyrequiredforsafetypurpose,andaimatguaranteeingcertainsystemp- formances and/or properties to be maintained in spite of faults. In the past more than30years,fruitfultheoreticalresultsonFDandFTChavebeenreportedforv- iouslinearandnonlinearsystemswithmanysuccessfulengineeringapplicationsin practicalsystems. FD problem for HS has attracted some attentions. However, to the best of the authors' knowledge, until now, the FTC issue for HS has not yet been intensively studied. FTC method for HS deserves further investigations due to its academic meaningaswellaspracticalone. 1. Motivationfromacademicresearch Itiswellknownthatthestabilityandsomespeci?cationsofHScanbeachieved underquite rigorousconditions. Most of existing results are devotedto off-line analysisanddesign,suchthattheHSworkswellaswhatitisexpected. However, faultsmayabruptlychangesystembehavior,FTCstrategiesmustbeapplied- line,notonlytokeepthestabilitybutalsotomaintainsomespeci?cationsofthe HSinpresenceoffaults. Thisresultsinagreattheoreticalchallenge,sincemany classicalFTCmethodsfornon-hybridsystemscannotbeeasilyextendedtoHS. FTCtheoryforHSneedstobedeveloped. VIII Preface 2. Motivationfrompracticalapplications Manypracticalsystemshavetobemodeledbyhybridmodels,e.g.chemicalp- cesses,switchedRLCcircuits,intelligenttransportationsystems,etc. Thesafety andreliabilityofthesesystemsareneeded,andFTCtechniquesforHSarehighly required. The HS considered in this book consists of a series of continuous modes and a switching logic. Switching from one mode to another is due to a switching law generated from the switching logic. Faulty behaviors of HS are investigated s- tematically. Two main kindsof faults are considered:Continuous faults that affect continuous modes; Discrete faults that affect the desired switching. In these two faultycases,theFTCdesignhastwomainobjectivesasfollows: 1) maintainthecontinuousperformancesincludingvariousstabilities (e.g. L- punovstability,asymptoticalstability andinput-to-statestability)oftheoriginand theoutputtracking/regulationbehaviorsalongthetrajectoriesofHS. 2) maintain the discrete speci?cations that have to be followed by HS, e.g. a desiredswitchingsequence.

The fully actuated system approach, which has gained considerable interest for its effectiveness in simplifying control design and analysis, offers a promising framework for tackling complex safety control problems. This book focuses on cooperative safety control design for multi-agent systems based on the fully actuated system approach.

The book explores the fault-tolerant control (FTC) methods for unmanned flight vehicle (UFV) by considering practical safety issues in low-altitude economic environments. It provides systematic and comprehensive descriptions of practical FTC issues of UFV in low-altitude economic environments, such as highly demanded performance constraints requirements in the presence of faults and disturbances, communication constraints including limited bandwidth and time-delay among numerous UFV, composite actuator-sensor faults in complex flight scenario, wake vortex encountered by the trailing UFV in close formation flight. To effectively address these practical safety issues for UFV in low-altitude economic environments, enhanced FTC strategies are artfully presented to improve the flight safety. Thus, UFVs can be used to execute tasks with a high safety level in the complex low-altitude economic environment. As such, the book offers readers an in-depth understanding of UFV in low-altitude economic environments and corresponding safe control design methods. The FTC methods presented here can also provide guidelines for engineers to improve the safety of aerospace engineering systems for promoting the development of low-altitude economy. The book offers a valuable asset for scientists and researchers, aerospace engineers, control engineers, lecturers and teachers, and graduates and undergraduates in the system and control community, especially those working in the field of UFV and low-altitude economic industry.