System Test and Diagnosis
System Test and Diagnosis

Author: William R. Simpson

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 389

ISBN-13: 1461527023

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System Test and Diagnosis is the first book on test and diagnosis at the system level, defined as any aggregation of related elements that together form an entity of sufficient complexity for which it is impractical to treat all of the elements at the lowest level of detail. The ideas presented emphasize that it is possible to diagnose complex systems efficiently. Since the notion of system is hierarchical, these ideas are applicable to all levels. The philosophy is presented in the context of a model-based approach, using the information flow model, that focuses on the information provided by the tests rather than the functions embedded in the system. Detailed algorithms are offered for evaluating system testability, performing efficient diagnosis, verifying and validating the models, and constructing an architecture for system maintenance. Several advanced algorithms, not commonly available in existing diagnosis tools, are discussed, including reasoning with inexact or uncertain test data, breaking large problems into manageable smaller problems, diagnosing systems with time sensitive information and time dependent tests and learning from experience. The book is divided into three parts. The first part provides motivation for careful development of the subject and the second part provides the tools necessary for analyzing system testability and computing diagnostic strategies. The third part presents advanced topics in diagnosis. Several case studies are provided, including a single detailed case study. Smaller case studies describe experiences from actual applications of the methods discussed. The detailed case study walks the reader through a complete analysis of a system to illustrate the concepts and describe the analyses that are possible. All case studies are based upon real systems that have been modeled for the purposes of diagnosis. System Test and Diagnosis is the culmination of nearly twelve years of research into diagnosis modeling and its applications. It is designed as a primary reference for engineers and practitioners interested in system test and diagnosis.

Life Cycle Costing for Engineers
Life Cycle Costing for Engineers

Author: B.S. Dhillon

Publisher: CRC Press

Published: 2009-10-26

Total Pages: 224

ISBN-13: 1439816891

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Cradle-to-grave analyses are becoming the norm, as an increasing amount of corporations and government agencies are basing their procurement decisions not only on initial costs but also on life cycle costs. And while life cycle costing has been covered in journals and conference proceedings, few, if any, books have gathered this information into an

Handbook of Human Factors Testing and Evaluation
Handbook of Human Factors Testing and Evaluation

Author: Samuel G. Charlton

Publisher: CRC Press

Published: 2019-09-25

Total Pages: 563

ISBN-13: 1000751570

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Like the first edition, the revision of this successful Handbook responds to the growing need for specific tools and methods for testing and evaluating human-system interfaces. Indications are that the market for information on these tools and applications will continue to grow in the 21st century. One of the goals of offering a second edition is to expand and emphasize the application chapters, providing contemporary examples of human factors test and evaluation (HFTE) enterprises across a range of systems and environments. Coverage of the standard tools and techniques used in HFTE have been updated as well. New features of the Handbook of Human Factors Testing and Evaluation include: *new chapters covering human performance testing, manufacturing ergonomics, anthropometry, generative design methods, and usability testing; *updated tools and techniques for modeling, simulation, embedded testing, training assessment, and psychophysiological measurement; *new applications chapters presenting human factors testing examples in aviation and avionics, forestry, road safety, and software systems; and *more examples, illustrations, graphics and tables have been added. The orientation of the current work has been toward breadth of coverage rather than in-depth treatment of a few issues or techniques. Experienced testers will find much that is familiar, as well as new tools, creative approaches, and a rekindled enthusiasm. Newcomers will discover the diversity of issues, methods, and creative approaches that make up the field. In addition, the book is written in such a way that individuals outside the profession should learn the intrinsic value and pleasure in ensuring safe, efficient, and effective operation, as well as increased user satisfaction through HFTE.

Application of Sliding Mode Methods to the Design of Reconfigurable Flight Control Systems
Application of Sliding Mode Methods to the Design of Reconfigurable Flight Control Systems

Author: Scott R. Wells

Publisher:

Published: 2002

Total Pages: 624

ISBN-13:

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Observer-based sliding mode control is investigated for application to aircraft reconfigurable flight control. An overview of reconfigurable flight control is given, including a review of the current state-of-the-art within the subdisciplines of fault detection parameter identification, adaptive control schemes, and dynamic control allocation. Of the adaptive control methods reviewed, sliding mode control (SMC) appears promising due its property of invariance to matched uncertainty. An overview of SMC is given and its properties are demonstrated. Sliding mode methods, however, are difficult to implement because unmodeled parasitic dynamics cause immediate and severe instability. This presents a challenge for all practical applications with limited bandwidth actuators. One method to deal with parasitic dynamics is the use of an asymptotic observer. Observer-based SMC is investigated, and a method for selecting observer gains is offered. An additional method for shaping the feedback loop using a filter is also developed. It is shown that this SMC prefilter is equivalent to a form of model reference hedging. A complete design procedure is given which takes advantage of the sliding mode boundary layer to recast the SMC as a linear control law. Frequency domain loop shaping is then used to design the sliding manifold. Finally, three aircraft applications are demonstrated. An F-18/HARV is used to demonstrate SISO and MIMO designs. The third application is a linear six degree-of-freedom advanced tailless fighter model. The observer-based SMC is seen to provide excellent tracking with superior robustness to parameter changes and actuator failures.

Applied Reliability and Quality
Applied Reliability and Quality

Author: Balbir S. Dhillon

Publisher: Springer Science & Business Media

Published: 2007-02-23

Total Pages: 252

ISBN-13: 1846284988

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Each industry, from robotics to health care, power generation to software, has its own tailored reliability and quality principles, methods, and procedures. This book brings these together so that reliability and quality professionals can more easily learn about each other's work, which may help them, directly or indirectly, to perform their tasks more effectively.