2008 Annual Reliability and Maintainability Symposium最新文献_第7页

System reliability evaluation using normalized test data 使用标准化测试数据进行系统可靠性评估

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925797

J.B. Farmer, P. Ellner

引用次数: 0

What's wrong with bent pin analysis, and what to do about it 弯针分析有什么问题，该怎么做

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925827

N. Ozarin

{"title":"What's wrong with bent pin analysis, and what to do about it","authors":"N. Ozarin","doi":"10.1109/RAMS.2008.4925827","DOIUrl":"https://doi.org/10.1109/RAMS.2008.4925827","url":null,"abstract":"Bent pin analysis is an important kind of failure modes and effects analysis that almost always ignores real-world behavior. The somewhat undisciplined nature of this FMEA means there is heavy reliance on human judgment, and given the particularly tedious nature of the task, the results are typically both incomplete and inaccurate. The analysis also provides oversimplified predictions of failure rates based on averages, or omits them entirely. However, carefully defining analysis rules that more realistically reflect real-world events make it possible for a computer to perform a great deal of the task with far more accuracy. Using these rules, the computer can determine individual failure rates for each permutation of short and open circuits. The computer can also go beyond these computations and do a great deal of additional analysis work, freeing humans to concentrate on circuits and systems instead of pins and wires. Finally, the computer can automatically supply repeated worksheet information - and bent pin FMEA worksheets have a lot of it - so that you never need to enter anything more than once. The result is a far more accurate, consistent, and complete analysis requiring much less effort. It brings bent pin analysis into the 21st century.","PeriodicalId":143940,"journal":{"name":"2008 Annual Reliability and Maintainability Symposium","volume":"12 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113962111","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: 6

A systems reliability approach to decision making in autonomous multi-platform systems operating a phased mission 自主多平台系统分阶段任务决策的系统可靠性方法

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925761

J. Andrews, D. Prescott, R. Remenyte-Prescott

引用次数: 19

Probabilistic common-cause failures analysis 概率共因故障分析

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925821

L. Xing, Wendai Wang

引用次数: 25

A unified model for evaluating the safety integrity level of safety instrumented systems 安全仪表系统安全完整性水平评价的统一模型

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925784

J. Bukowski

引用次数: 3

An age-adjusted comparison of field failure data for repairable systems 可修系统现场故障数据的年龄调整比较

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925769

T. Halim, L. Tang

{"title":"An age-adjusted comparison of field failure data for repairable systems","authors":"T. Halim, L. Tang","doi":"10.1109/RAMS.2008.4925769","DOIUrl":"https://doi.org/10.1109/RAMS.2008.4925769","url":null,"abstract":"The conventional calendar-based mean cumulative function (MCF) plot is useful in monitoring the field reliability of a population of repairable systems deployed in a large quantity. It is simple and easily understood by management. However, it is age-confounded when the system population is heterogeneous with age. Assuming that the systems follow the well-known ldquoBathtubrdquo behavior, the population which consists of a higher proportion of aged systems will perform badly on the MCF plot compared to another population made up of mainly newer systems. Hence, direct comparisons between the two populations may not be fair. This paper illustrates a few simple steps that aid in mitigating such age heterogeneity issue prior to plotting the MCF. The age-adjusted MCF allows a fairer comparison of maintenance performance between the populations. The applicability of the proposed approach is demonstrated using actual field failure data. The case study shows that if differences in system age compositions are not accounted for, different conclusions could be drawn which could be detrimental to the maintenance personnel morale. Worse still, precious maintenance resources might be channeled to the wrong location. Other than age, the proposed approach can be easily extended to adjust for other system attributes.","PeriodicalId":143940,"journal":{"name":"2008 Annual Reliability and Maintainability Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128744433","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

An approach for estimating the reliability of transmission oils 一种估计传动油可靠性的方法

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925807

C. Maisch, B. Bertsche, B. Hohn, H. Otto

{"title":"An approach for estimating the reliability of transmission oils","authors":"C. Maisch, B. Bertsche, B. Hohn, H. Otto","doi":"10.1109/RAMS.2008.4925807","DOIUrl":"https://doi.org/10.1109/RAMS.2008.4925807","url":null,"abstract":"This paper deals with an approach for estimating the reliability of transmission oils. Forecasting oil degradation, especially oil oxidation allows to adjust the right oil change intervals in order to save costs and expand the transmission's lifetime. A brief overview about the machine component transmission oil imparts fundamental knowledge. Afterwards definitions of oil failures and combining them to an oil failure system are explained. The oil lifetime line describes the relationship between possible oil temperature and oil lifetime. Such a line is the keystone in order to describe the oil's failure behavior caused by oil oxidation. That's why two approaches are presented to derive an oil lifetime line. Both approaches use a certain oil failure criteria explained in the paper. The first approach is based on the pitting damage accumulation hypothesis. This hypothesis is expanded with the effect of oil degradation what enables to derive an oil lifetime line out of the results of a back-to-back spur gear rig test. Second a General Log Linear Model is used with available data to estimate the gears pitting lifetime depending on oil degradation. With the defined oil failure criteria it was possible to derive an oil lifetime line for mineral oil based fluids. Further work will include the estimation of an oil lifetime line with a probability and confidence intervals. Synthetic oil based fluids need to be investigated more intensive in order to create a suitable oil lifetime line for such fluids.","PeriodicalId":143940,"journal":{"name":"2008 Annual Reliability and Maintainability Symposium","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131434276","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 methodology for managing reliability growth during operational mission profile testing 一种在作战任务剖面测试过程中管理可靠性增长的方法

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925768

L. H. Crow

{"title":"A methodology for managing reliability growth during operational mission profile testing","authors":"L. H. Crow","doi":"10.1109/RAMS.2008.4925768","DOIUrl":"https://doi.org/10.1109/RAMS.2008.4925768","url":null,"abstract":"It is common practice for systems to be subjective to operational testing during their development program. The objective of this testing is to evaluate the performance, including reliability, of the system under conditions that represent actual use conditions. Because of expense, resources, schedule, and other considerations, these operational tests rarely represent exactly the actual use conditions. Rather, stated mission profile conditions are specific for the operational testing. These mission profiles conditions are typically general statements that guide the testing on an average basis during the testing. Because of practical constraints the elements that make up the mission profile conditions are typically tested under varying schedules with the intent that on average the mission profile conditions are met. It is also common practice that reliability corrective actions are incorporated into the system during this type of testing. That is, the test is often an operational mission profile reliability growth test. Under these conditions, we usually have a lack of structure for managing the elements that make up the mission profiles, which makes it very difficult to have an agreed-on methodology for estimating the system's reliability. This is especially true if reliability growth is occurring. Many systems fail operational testing because key assessments parameters can not be made in a straightforward clear manner so that management can take timely and appropriate action. This paper addresses this issue and presents a methodology currently being applied on major Department of Defense programs for operational reliability growth testing.","PeriodicalId":143940,"journal":{"name":"2008 Annual Reliability and Maintainability Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129682222","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: 12

Uncertainty in Life Cycle Cost of railway track 铁路轨道全寿命周期成本的不确定性

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925767

A. P. Patra, P. Soderholm, U. Kumar

引用次数: 1

A case study on network reliability analysis for systems with non-independent paths 非独立路径系统的网络可靠性分析实例研究

2008 Annual Reliability and Maintainability Symposium Pub Date : 2008-01-28 DOI: 10.1109/RAMS.2008.4925779

Meng-Lai Yin, R. Arellano

引用次数: 2