Annual Reliability and Maintainability Symposium 1995 Proceedings最新文献_第5页

A graphical model-based reliability estimation tool and failure mode and effects simulator 基于图形模型的可靠性估计工具和故障模式及影响模拟器

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513226

D. Nicol, D. Palumbo, M.L. Ulrey

{"title":"A graphical model-based reliability estimation tool and failure mode and effects simulator","authors":"D. Nicol, D. Palumbo, M.L. Ulrey","doi":"10.1109/RAMS.1995.513226","DOIUrl":"https://doi.org/10.1109/RAMS.1995.513226","url":null,"abstract":"A new graphical reliability estimation tool, Reliability Performance Module (RPM), is described. RPM combines the features of a powerful reliability tool, Reliability Estimation System Testbed (REST), developed at NASA Langley, with the convenient graphical modelling and simulation capabilities of an off-the-shelf commercial software package, Block Oriented Network Simulator (BONeS), from the Alta Group of Cadence Design Systems. In order to estimate the reliability of a system, the built-in BONeS graphics capabilities are used to describe the system, and the embedded REST execution engine produces a reliability analysis automatically. An additional benefit of this approach is that a detailed failure modes and effects analysis can be derived by using the simulation capabilities of the tool. The usage of and output from RPM is demonstrated with an example system. As compared to our current design process, RPM promises to reduce overall modelling and analysis time, provide better documentation, make trade studies easier, create reusable modelling components and subsystems, and provide the integration of reliability and timing analysis necessary to guarantee the safety of critical real-time systems. Future work will concentrate on producing a more seamless integration of the reliability and timing analyses. Additional planned enhancements include a distributed (parallel) processing mode, and availability and phased-mission analysis capabilities.","PeriodicalId":143102,"journal":{"name":"Annual Reliability and Maintainability Symposium 1995 Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132463625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Nickel dendrites: a new failure mechanism in ceramic hermetic packages 镍枝晶:陶瓷密封封装中的一种新的失效机制

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513221

A. Kostić, A. Rensch, D. Sturm

{"title":"Nickel dendrites: a new failure mechanism in ceramic hermetic packages","authors":"A. Kostić, A. Rensch, D. Sturm","doi":"10.1109/RAMS.1995.513221","DOIUrl":"https://doi.org/10.1109/RAMS.1995.513221","url":null,"abstract":"A new failure mechanism, nickel dendrites, was identified in hermetic ceramic packages. Nickel dendrites resulted from an unauthorized change in the supplier's assembly process. The change caused lots to be produced with package ambient moisture levels ranging from 10% by volume to 20% by volume. Device cooling in the system application reduced the package temperature below the dew point of the internal package ambient and allowed water to condense. The liquid water absorbed materials from the ambient atmosphere and reacted with the nickel underplating of the package conductors. Normal operating voltages provided the electrical potential necessary for the growth of nickel dendrites. Burn-in was not effective in screening out this failure mechanism because temperature during burn-in was above the dew point of the package ambient. The supplier revised their assembly procedures to prevent unauthorized process changes of this type. UNISYS purged all devices in the suspect date code range from the factory and field inventory. Corrective actions were implemented by UNISYS and the supplier with the result that this failure mechanism was eliminated from both field and factory. The nickel dendrite failure mechanism has not been reported in any literature. Hermetic ceramic packaging is widely used. The existence of a new failure mechanism has tremendous potential impact on product reliability, process controls, reliability prediction, and failure analysis.","PeriodicalId":143102,"journal":{"name":"Annual Reliability and Maintainability Symposium 1995 Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125262261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Applying fuzzy cognitive-maps knowledge-representation to failure modes effects analysis 模糊认知图知识表示在失效模式影响分析中的应用

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513283

C. Peláez, J. Bowles

{"title":"Applying fuzzy cognitive-maps knowledge-representation to failure modes effects analysis","authors":"C. Peláez, J. Bowles","doi":"10.1109/RAMS.1995.513283","DOIUrl":"https://doi.org/10.1109/RAMS.1995.513283","url":null,"abstract":"A failure mode and effects analysis (FMEA) seeks to determine how a system will behave in the event of a device failure. It involves the integration of several expert tasks to select components for analysis, determine failure modes, predict failure effects, propose corrective actions, etc. During an FMEA, numerical values are often not available or applicable and qualitative thresholds and linguistic terms such as high, slightly high, low, etc., are usually more relevant to the design than numerical expressions. Fuzzy set theory and fuzzy cognitive maps provide a basis for automating much of the reasoning required to carry out an FMEA on a system. They offer a suitable technique to allow symbolic reasoning in the FMEA instead of numerical methods, thus providing human like interpretations of the system model under analysis, and they allow for the integration of multiple expert opinions. This paper describes how fuzzy cognitive maps can be used to describe a system, its missions, failure modes, their causes and effects. The maps can then be evaluated using both numerical and graphical methods to determine the effects of a failure and the consistency of design decisions.","PeriodicalId":143102,"journal":{"name":"Annual Reliability and Maintainability Symposium 1995 Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115355904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 126

New benchmark for unreplicated experimental-design analysis 非重复实验设计分析的新基准

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513252

C. Benski, E. Cabau

引用次数: 2

A comparison of software-testing methodologies 软件测试方法的比较

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513287

C. Smidts, D. Sova

引用次数: 1

On reliability growth testing 关于可靠性增长试验

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513241

E. Demko

引用次数: 5

A nonexponential approach to availability modeling 可用性建模的非指数方法

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513254

D.W. Jacobson, S. Arora

引用次数: 10

Modeling silent failures in telecommunications systems 电信系统中无声故障的建模

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513255

J.A. Stanshine

引用次数: 1

The role of the R&M disciplines in the new NASA R&M学科在新NASA中的作用

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513232

R. C. Lisk

{"title":"The role of the R&M disciplines in the new NASA","authors":"R. C. Lisk","doi":"10.1109/RAMS.1995.513232","DOIUrl":"https://doi.org/10.1109/RAMS.1995.513232","url":null,"abstract":"With the increasing demand to accomplish scientific missions with fewer resources, NASA has been reexamining its technical approaches to its research and development activities. The Agency Strategic Plan, approved by the Administrator in the spring of 1994, states: \"We will conduct our programs such that we are the recognized international leader in the safety, quality and mission assurance activities. We will use a systematic and disciplined approach involving the adequacy, oversight, and support to the technical risk decision making process.\" The Office of Safety and Mission Assurance (OSMA) at NASA Headquarters has the responsibility for making this operating principle a reality. The Office of Safety and Mission Assurance has expressed as its objectives: (1) establish/maintain SRM&QA functions as aggressive contributing elements in the planning, development and implementation of NASA programs and strategic enterprises; (2) continually refine the NASA Safety and Mission Assurance Program to anticipate evolving technological requirements; (3) promote technical excellence and continual improvement in SRM&QA products and services in support of our program customers; and (4) promote the development of innovative methods/techniques to achieve safety and mission success and S&MA technology advancement.","PeriodicalId":143102,"journal":{"name":"Annual Reliability and Maintainability Symposium 1995 Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126559490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A verification tool to measure software in critical systems 在关键系统中测量软件的验证工具

Annual Reliability and Maintainability Symposium 1995 Proceedings Pub Date : 1995-01-16 DOI: 10.1109/RAMS.1995.513263

S.K. Iwohara, Dar-Biau Liu

{"title":"A verification tool to measure software in critical systems","authors":"S.K. Iwohara, Dar-Biau Liu","doi":"10.1109/RAMS.1995.513263","DOIUrl":"https://doi.org/10.1109/RAMS.1995.513263","url":null,"abstract":"Previously, software metrics have been established to evaluate the software development process throughout the software life cycle, and have been effective in helping to determine how a software design is progressing. These metrics are used to uncover favorable and unfavorable design trends and identify potential problems and deficiencies early in the development process to reduce costly redesign or the delivery of immature error prone software. One area where design metrics plays an important role is in the identification of misunderstandings between the software engineer and the system or user requirements due to incorrect or ambiguous statements of requirements. However, the metrics developed to date do not consider the additional interface to the safety engineer when developing critical systems. Because a software error in a computer controlled critical system can potentially result in death, injury, loss of equipment or property, or environmental harm, a safety metrics set was developed to ensure that the safety requirements are well understood and correctly implemented by the software engineer. This paper presents a safety metrics set that can be used to evaluate the maturity of hazard analysis processes and its interaction with the software development process.","PeriodicalId":143102,"journal":{"name":"Annual Reliability and Maintainability Symposium 1995 Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115008639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1