2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)最新文献_第10页

Bayesian methods for evaluating discrete reliability growth 离散可靠性增长评估的贝叶斯方法

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2009-05-12 DOI: 10.1109/RAMS.2009.4914707

J. Hall, A. Mosleh

{"title":"Bayesian methods for evaluating discrete reliability growth","authors":"J. Hall, A. Mosleh","doi":"10.1109/RAMS.2009.4914707","DOIUrl":"https://doi.org/10.1109/RAMS.2009.4914707","url":null,"abstract":"Bayesian estimation procedures are derived herein that may be utilized to evaluate reliability growth of discrete-use systems, such as guns, rockets, missile systems, torpedoes, etc. One advantage of these Bayesian procedures is that they directly quantify the epistemic uncertainties in model parameters, i.e., the shape parameters of the beta distribution, as well as several reliability growth metrics of basic interest to program management. These metrics include: (1) the initial system reliability; (2) the projected reliability following failure mode mitigation; (3) reliability growth potential, i.e., the theoretical upper-limit on reliability achieved by finding and fixing all failure modes via a specified level of effectiveness; (4) the expected number of failure modes observed during testing; (5) the probability of observing a new failure mode and; (6) the fractional contribution of correctable failure modes to the initial probability of failure. These metrics and associated model equations give reliability practitioners the means to: (1) assess reliability achievement of discrete-use systems undergoing development; (2) address model goodness-of-fit concerns and; (3) quantify programmatic risk, and system maturity.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116245476","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

Ruggedness and reliability of lead free electronics 无铅电子产品的坚固性和可靠性

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 1900-01-01 DOI: 10.1109/RAMS.2010.5447988

J. E. Starr

引用次数: 0

Developmental space-system elicitation techniques for risk-informed design practices 发展空间系统启发技术的风险知情设计实践

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 1900-01-01 DOI: 10.1109/RAMS.2010.5448024

B. J. Franzini, B. Putney

{"title":"Developmental space-system elicitation techniques for risk-informed design practices","authors":"B. J. Franzini, B. Putney","doi":"10.1109/RAMS.2010.5448024","DOIUrl":"https://doi.org/10.1109/RAMS.2010.5448024","url":null,"abstract":"The environment designers must conquer to realize crewed space-exploration initiatives presents a heavily mass constrained design space coupled with immense consequences given hardware failures. The balance of these two highly dependent design elements throughout the design process requires insights provided through reliability and risk assessments at early stages of system concept development. If reliability impacts are not analyzed, designers often apply too much redundancy to ensure crew safety or apply too little redundancy or failure mitigation hardware to ensure they meet mass requirements imposed by mission designers. Understanding what the addition of mass to a design is buying you, from a performance as well as reliability perspective, can ensure design trades are being made with a risk-informed perspective. The technique discussed in this paper conveys a method of risk-informed design that is guided by system design documents and based heavily on face-to-face designer interaction and elicitation. This approach proved very efficient, as designers were closely engaged early in design cycles and forced to focus on reliability strategies that were heavily influenced and implemented by the designer's own expertise.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130071912","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

Design of accelerated life testing using proportional hazards-proportional odds 使用比例风险-比例几率的加速寿命试验设计

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 1900-01-01 DOI: 10.1109/RAMS.2010.5448032

Tingting Huang, T. Jiang

{"title":"Design of accelerated life testing using proportional hazards-proportional odds","authors":"Tingting Huang, T. Jiang","doi":"10.1109/RAMS.2010.5448032","DOIUrl":"https://doi.org/10.1109/RAMS.2010.5448032","url":null,"abstract":"D-optimality is adopted in the optimum design of accelerated life testing in recent years. However, for some cases, the optimization results tend to approach the extreme stress levels and processing accelerated life testing under such stress levels would not obtain much information about lifetime and reliability of the test units. This paper presents an optimum design of constant stress accelerated life testing based on proportional hazardsproportional odds using penalized local D-optimality. It establishes the objective function as the product of the Fisher information matrix as defined in proportional hazardsproportional odds model and penalty functions which describe the ‘closeness’ of the probability density functions of two specified stress levels. Optimization results are obtained by maximizing the objective function subject to certain constraints. This optimum method avoids obtaining limit stress levels of test planning using D-optimality for some cases. Simulation study is given finally. The comparison of the optimization results by D-optimality and penalized local Doptimality shows that optimization results using penalized local D-optimality is more reasonable.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121383108","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

How to design a better reliability test program 如何设计一个更好的可靠性测试程序

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 1900-01-01 DOI: 10.1109/RAMS.2010.5447979

M. Silverman

引用次数: 0

Reintegration of sustainment into systems engineering during the department of defense acquisition process 在国防部采办过程中将维持融入系统工程

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 1900-01-01 DOI: 10.1109/RAMS.2010.5448052

Grant R. Schmieder

引用次数: 1

Availability target of the railway infrastructure: an analysis 铁路基础设施可用性目标分析

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 1900-01-01 DOI: 10.1109/RAMS.2010.5448035

A. P. Patra, U. Kumar, Per-Olof Larsson Kråik

{"title":"Availability target of the railway infrastructure: an analysis","authors":"A. P. Patra, U. Kumar, Per-Olof Larsson Kråik","doi":"10.1109/RAMS.2010.5448035","DOIUrl":"https://doi.org/10.1109/RAMS.2010.5448035","url":null,"abstract":"The railway has been accepted as one of the most environmentally friendly modes of transport for goods and passengers. However, the railway sector is striving to increase its capacity to meet the growing demand for the transport of goods and passengers with a high level of punctuality in its services. Higher availability requires the effective operation and maintenance of infrastructure, often necessitating the implementation of cost-effective preventive maintenance strategies. Therefore, a higher availability target means higher maintenance investment. However, the question of setting the availability target for the infrastructure is not easy, as it involves many influencing decision parameters, apart from a good understanding of the network configuration and traffic density. Railway networks that have a smaller number of trains and a low punctuality requirement do not require higher availability targets. The aim of this paper is to estimate the availability target for railway infrastructure based on the capacity and punctuality requirements of infrastructure managers and train operating companies. The objectives of the paper are to develop an approach to i) estimating the capacity of the infrastructure based on the design and operational characteristics and evaluating the influence of infrastructure availability on the required capacity and ii) estimating the volume of primary and secondary delay due to failures and maintenance of the infrastructure and establishing the relationship between availability and punctuality requirements. To achieve these objectives, an example is presented with parameters drawn from failure, maintenance and traffic data. Finally, a model has been developed in Petri-Nets to establish a relationship between availability, capacity and punctuality. Monte Carlo simulation is used to establish the relationship. The simulation results illustrate the effect of infrastructure availability on train delays and capacity.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133681730","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: 13