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16 produkter
16 produkter
Del 252 - Lecture Notes in Economics and Mathematical Systems
On the Use of Stochastic Processes in Modeling Reliability Problems
Häftad, Engelska, 1985
562 kr
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Stochastic processes are powerful tools for the investigation of reliability and availability of repairable equipment and systems. Because of the involved models, and in order to be mathematically tractable, these processes are generally confined to the class of regenerative stochastic processes with a finite state space, to which belong: renewal processes, Markov processes, semi-Markov processes, and more general regenerative processes with only one (or a few) regeneration staters). The object of this monograph is to review these processes and to use them in solving some reliability problems encountered in practical applications. Emphasis is given to a comprehensive exposition of the analytical procedures, to the limitations in volved, and to the unification and extension of. the models known in the literature. The models investigated here assume. that systems have only one repair crew and that no further failure can occur at system down. Repair and failure rates are general ized step-by-step, up to the case in which the involved process is regenerative with only one (or a few) regeneration state(s). Investigations deal with different kinds of reliabilities and availabilities for series/parallel structures. Preventive main tenance and imperfect switching are considered in some examples.
E-bok
PDF, Engelska, 20072 279 kr
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This 5th edition differs from the 4th one for some refinements and extensions mainly on investigation and test of complex repairable systems. For phased-mission systems a new approach is given for both reliability and availability (Section 6. 8. 6. 2). Effects of common cause failures (CCF) are carefully investigated for a 1-out-of-2 redundancy (6. 8. 7). Petri nets and dynamic FTA are introduced as alternative investigation methods for repairable systems (6. 9). Approximate expressions are further developed. An unified approach for availability estimation und demonstration is given for exponentially and Erlangian distributed failure-free and repair times (7. 2. 2, A8. 2. 2. 4, A8. 3. 1. 4). Con$dence limits at system level are given for the case of constant failure rates (7. 2. 3. 1). Investigation of nonhomogeneous Poisson processes is refined and more general point processes (superimposed, cumulative) are discussed (A7. 8), with application to data analysis (7. 6. 2) & cost optimization (4. 7). Trend tests to detect early failures or wearozdi are introduced (7. 6. 3). A simple demonstration for mean & variance in a cumulative process is given (A7. 8. 4). Expansion of a redundancy 2-out-of-3 to a redundancy 1-out-of-3 is discussed (2. 2. 6. 5). Some present production-related reliability problems in VLSI ICs are shown (3. 3. 4). Maintenance strategies are reviewed (4. 6). As in the previous editions of this book, reliability figures at system level have indices SI (e. g.
Häftad, Tyska, 1997
812 kr
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Dieses Buch gibt eine fundierte Einführung in die Methoden der Qualitäts- und Zuverlässigkeitssicherung bei der Entwicklung und Produktion von Geräten und Systemen. Der Schwerpunkt liegt auf der Anwendung, vor allem auch in Verbindung mit der ISO 9001 und der EU-Produkthaftungsregelungen. Zahlreiche Beispiele, Abbildungen und Tabellen illustrieren die praxisnah aufbereiteten, sauber mathematisch begründeten Inhalte. Dem Leser wird somit ein rascher Einstieg in Theorie und Praxis der Qualitäts- und Zuverlässigkeitssicherung geboten, der auch für das Selbststudium geeignet ist. Das Werk richtet sich sowohl an Entwicklungsingnieure, Projektleiter, Qualitätsfachleute, Produktionsingenieure sowie Ingenieure in Marketing und Vertrieb als auch an Studenten an Fachhochschulen und Universitäten.
E-bok
PDF, Engelska, 20102 421 kr
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27 Required function (mission profile) • Set up the reliability block diagram FMEA where (RBD), by performing a redundancy appears Eliminate reliability weaknesses • Determine the component stresses • component/material selection • Compute the failure rate Ai of each • derating component • screening • Compute R(t) at the assembly level • redundancy • Check the fulfillment of reliability design rules • Perform a preliminary design review no yes Go to the next assembly or to the next integration level Figure 2. 1 Reliability analysis procedure at assembly level Taking account of the above considerations, Fig. 2. 1 shows the reliability analysis procedure used in practical applications at assembly level. The proce dure of Fig. 2. 1 is based on the part stress method discussed in Section 2. 2. 4 (see Section 2. 2. 7 for the part count method). Also included are a failure modes and effect analysis (FMEA/FMECA), to check the validity of the assumed failure modes, and a verification of the adherence to design guidelines for relia bility in a preliminary design review (Section 5. 1, Appendices A3. 3. 5 & A4). Verification of the assumed failure modes is mandatory where redundancy appears, in particular because of the series element in the reliability block diagram (see for instance Example 2. 6, Sections 2. 3. 6 for elements with more than one failure mode & 6. 8. 7 for common cause failures, and Figs. 2. 8- 2. 9 & 6. 17- 6.
E-bok
PDF, Engelska, 20132 680 kr
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This book shows how to build in, evaluate, and demonstrate reliability and availability of components, equipment, systems. It presents the state-of-the-art of reliability engineering, both in theory and practice, and is based on the author''s more than 30 years experience in this field, half in industry and half as Professor of Reliability Engineering at the ETH, Zurich. The structure of the book allows rapid access to practical results. This final edition extend and replace all previous editions. New are, in particular, a strategy to mitigate incomplete coverage, a comprehensive introduction to human reliability with design guidelines and new models, and a refinement of reliability allocation, design guidelines for maintainability, and concepts related to regenerative stochastic processes. The set of problems for homework has been extended. Methods & tools are given in a way that they can be tailored to cover different reliability requirement levels and be used for safety analysis. Because of the Appendices A6 - A8, the book is also self contained from a mathematical point of view, and can be used as a text book or as a desktop reference, with a large number of tables (60), figures (190), and examples (210 of which 70 as problems for homework) to support the practical aspects.
E-bok
PDF, Engelska, 2012734 kr
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Stochastic processes are powerful tools for the investigation of reliability and availability of repairable equipment and systems. Because of the involved models, and in order to be mathematically tractable, these processes are generally confined to the class of regenerative stochastic processes with a finite state space, to which belong: renewal processes, Markov processes, semi-Markov processes, and more general regenerative processes with only one (or a few) regeneration staters). The object of this monograph is to review these processes and to use them in solving some reliability problems encountered in practical applications. Emphasis is given to a comprehensive exposition of the analytical procedures, to the limitations in volved, and to the unification and extension of. the models known in the literature. The models investigated here assume. that systems have only one repair crew and that no further failure can occur at system down. Repair and failure rates are general ized step-by-step, up to the case in which the involved process is regenerative with only one (or a few) regeneration state(s). Investigations deal with different kinds of reliabilities and availabilities for series/parallel structures. Preventive main tenance and imperfect switching are considered in some examples.
E-bok
PDF, Tyska, 2013488 kr
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Dieses Buch gibt eine fundierte Einführung in die Methoden der Qualitäts- und Zuverlässigkeitssicherung bei der Entwicklung und Produktion von Geräten und Systemen. Der Schwerpunkt liegt auf der Anwendung, vor allem auch in Verbindung mit der ISO 9001 und der EU-Produkthaftungsregelungen. Zahlreiche Beispiele, Abbildungen und Tabellen illustrieren die praxisnah aufbereiteten, sauber mathematisch begründeten Inhalte. Dem Leser wird somit ein rascher Einstieg in Theorie und Praxis der Qualitäts- und Zuverlässigkeitssicherung geboten, der auch für das Selbststudium geeignet ist. Das Werk richtet sich sowohl an Entwicklungsingnieure, Projektleiter, Qualitätsfachleute, Produktionsingenieure sowie Ingenieure in Marketing und Vertrieb als auch an Studenten an Fachhochschulen und Universitäten.
E-bok
PDF, Engelska, 20121 733 kr
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High reliability, maintanability, and safety are expected fro complex equipment and systems. This book presents state-of-the-art methods and procedures used for cost and time effective quality and reliability assurance during the design and production of equipment and systems. It is based on more than 20 years experience gained by the author in research and industry.The book covers theory, practice, and management aspects and addresses the needs of scientists, system-oriented engineers, engineers in development and production and project and quality assurance managers. The second edition has been completely updated revised and includes modern concepts such as Total Quality Management (TQM) and Concurrent Engineering.
Häftad, Engelska, 2012
1 755 kr
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High reliability, maintanability, and safety are expected fro complex equipment and systems. This book presents state-of-the-art methods and procedures used for cost and time effective quality and reliability assurance during the design and production of equipment and systems. It is based on more than 20 years experience gained by the author in research and industry.The book covers theory, practice, and management aspects and addresses the needs of scientists, system-oriented engineers, engineers in development and production and project and quality assurance managers. The second edition has been completely updated revised and includes modern concepts such as Total Quality Management (TQM) and Concurrent Engineering.
E-bok
PDF, Engelska, 20131 140 kr
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High reliability, maintainability, and safety are expected from complex equipment and systems. To build these characteristics into an item, failure rate and failure mode analyses have to be performed early in the design phase, starting at the com ponent level, and have to be supported by a set of design guidelines for reliability and maintainability as well as by extensive design reviews. Before production, qualification tests of prototypes must ensure that quality and reliability targets have been reached. In the production phase, processes and procedures have to be selec ted and monitored to assure the required quality level. For many systems, availabi lity requirements must also be satisfied. In these cases, stochastic processes can be used to investigate and optimize availability, including logistical support. This book presents the state of the art of the methods and procedures necessary for a cost and time effective quality and reliability assurance during the design and production of equipment and systems. It takes into consideration that: 1. Quality and reliability assurance of complex equipment and systems requires that all engineers involved in a project undertake a set of specific activities from the definition to the operating phase, which are performed concurrently to achieve the best performance, quality, and reliability for given cost and time schedule targets.
E-bok
PDF, Engelska, 20131 100 kr
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The large interest granted to this book made a 4th edition necessary. The structure of the book is unchanged, with its main part in Chapters 1 - 8 and self contained appendices Al - A5 on management aspects and A6 -A8 on basic probability theory, stochastic processes & statistics. Such a structure allows rapid access to practical results and a comprehensive introduction to the mathematical foundation of reliability theory. The content has been extended and reviewed. New models & considerations have been added to Appendix A 7 for stochastic processes (NHPP), Chapter 4 for spare parts provisioning, Chapter 6 for complex repairable systems (imperfect switching, incomplete coverage, items with more than two states, phased-mission systems, fault tolerant reconfigurable systems with reward and frequency / duration aspects, Monte Carlo simulation), and Chapters 7 & 8 for reliability data analysis. Some results come from a stay in 2001 as Visiting Fellow at the Institute of Advanced Study of the University of Bologna. Performance, dependability, cost, and time to market are key factors for today''s products and services. However, failure of complex systems can have major safety consequences.
E-bok
PDF, Tyska, 2013531 kr
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Aus den Besprechungen: "...Mit der wachsenden Komplexität von Geräten und Anlagen sind im Laufe der Jahre die Aspekte von Zuverlässigkeit und Verfügbarkeit immer mehr in den Vordergrund gerückt. Das vorliegende Buch beschreibt den Stand der Technik auf dem Gebiet der Qualitäts- und Zuverlässigkeitssicherung von Geräten und Anlagen. Es richtet sich in erster Linie an Entwicklungsingenieure sowie an Qualitäts- und Zuverlässigkeitsfachleute. Behandelt werden Zuverlässigkeitsanalysen in der Entwicklungsphase, Wahl und Qualifikation elektronischer Bauteile, Instandhaltbarkeitsanalysen in der Entwicklungsphase, Qualitätssicherung der Software, Zuverlässigkeit und Verfügbarkeit reparierbarer Betrachtungseinheiten, statistische Zuverlässigkeitsprüfungen sowie Hebung der Qualität und der Zuverlässigkeit in der Fertigungsphase." Qualität und Zuverlässigkeit#1
E-bok
PDF, Tyska, 2013538 kr
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Inbunden, Engelska, 2017
3 495 kr
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This book shows how to build in and assess reliability, availability, maintainability, and safety (RAMS) of components, equipment, and systems. It presents the state of the art of reliability (RAMS) engineering, in theory & practice, and is based on over 30 years author's experience in this field, half in industry and half as Professor of Reliability Engineering at the ETH, Zurich. The book structure allows rapid access to practical results. Methods & tools are given in a way that they can be tailored to cover different RAMS requirement levels. Thanks to Appendices A6 - A8 the book is mathematically self-contained, and can be used as a textbook or as a desktop reference with a large number of tables (60), figures (210), and examples / exercises^ 10,000 per year since 2013) were the motivation for this final edition, the 13th since 1985, including German editions. Extended and carefully reviewed to improve accuracy, it represents the continuous improvement effort to satisfy reader's needs and confidence. New are an introduction to risk management with structurally new models based on semi-Markov processes & to the concept of mean time to accident, reliability & availability of a k-out-of-n redundancy with arbitrary repair rate for n - k=2, 10 new homework problems, and refinements, in particular, on multiple failure mechanisms, approximate expressions, incomplete coverage, data analysis, and comments on ë, MTBF, MTTF, MTTR, R, PA.
E-bok
PDF, Engelska, 20174 267 kr
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This book shows how to build in and assess reliability, availability, maintainability, and safety (RAMS) of components, equipment, and systems. It presents the state of the art of reliability (RAMS) engineering, in theory & practice, and is based on over 30 years author''s experience in this field, half in industry and half as Professor of Reliability Engineering at the ETH, Zurich. The book structure allows rapid access to practical results. Methods & tools are given in a way that they can be tailored to cover different RAMS requirement levels. Thanks to Appendices A6 - A8 the book is mathematically self-contained, and can be used as a textbook or as a desktop reference with a large number of tables (60), figures (210), and examples / exercises^ 10,000 per year since 2013) were the motivation for this final edition, the 13th since 1985, including German editions. Extended and carefully reviewed to improve accuracy, it represents the continuous improvement effort to satisfy reader''s needs and confidence. New are an introduction to risk management with structurally new models based on semi-Markov processes & to the concept of mean time to accident, reliability & availability of a k-out-of-n redundancy with arbitrary repair rate for n - k=2, 10 new homework problems, and refinements, in particular, on multiple failure mechanisms, approximate expressions, incomplete coverage, data analysis, and comments on ë, MTBF, MTTF, MTTR, R, PA.
Häftad, Engelska, 2018
3 373 kr
Skickas inom 5-8 vardagar
This book shows how to build in and assess reliability, availability, maintainability, and safety (RAMS) of components, equipment, and systems. It presents the state of the art of reliability (RAMS) engineering, in theory & practice, and is based on over 30 years author's experience in this field, half in industry and half as Professor of Reliability Engineering at the ETH, Zurich. The book structure allows rapid access to practical results. Methods & tools are given in a way that they can be tailored to cover different RAMS requirement levels. Thanks to Appendices A6 - A8 the book is mathematically self-contained, and can be used as a textbook or as a desktop reference with a large number of tables (60), figures (210), and examples / exercises^ 10,000 per year since 2013) were the motivation for this final edition, the 13th since 1985, including German editions. Extended and carefully reviewed to improve accuracy, it represents the continuous improvement effort to satisfy reader's needs and confidence. New are an introduction to risk management with structurally new models based on semi-Markov processes & to the concept of mean time to accident, reliability & availability of a k-out-of-n redundancy with arbitrary repair rate for n - k=2, 10 new homework problems, and refinements, in particular, on multiple failure mechanisms, approximate expressions, incomplete coverage, data analysis, and comments on ë, MTBF, MTTF, MTTR, R, PA.