2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)最新文献_第3页

Engineering design analysis (Physics of Failure) 工程设计分析(失效物理)

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5448049

Gary S. Drake

引用次数: 7

Compliance testing is NOT reliability testing 遵从性测试不是可靠性测试

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5447981

V. Hegde

引用次数: 1

From HALT results to an accurate field MTBF estimate 从HALT结果到准确的现场MTBF估计

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5448013

Harry W. McLean

引用次数: 9

Assessment of maintenance policies for a multi-deterioration rates system 多劣化率系统的维护策略评估

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5447964

A. Ponchet, M. Fouladirad, A. Grall

引用次数: 0

Degraded systems with multiple performance parameters subject to shocks 具有多个性能参数的系统受到冲击

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5447968

Chun-yang Li, Xun Chen, X. Yi, J. Tao

引用次数: 5

Developing effective spare parts estimations results in improved system availability 开发有效的备件评估可以提高系统的可用性

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5447985

B. Ghodrati, D. Banjevic, A. Jardine

{"title":"Developing effective spare parts estimations results in improved system availability","authors":"B. Ghodrati, D. Banjevic, A. Jardine","doi":"10.1109/RAMS.2010.5447985","DOIUrl":"https://doi.org/10.1109/RAMS.2010.5447985","url":null,"abstract":"Production and manufacturing firms are under great pressure to continuously reduce their production costs in order to stay competitive. Industrial operation cost analysis shows that, in general, maintenance represents a significant proportion of the overall operating cost. For instance, the cost of maintenance in the highly mechanized Kiruna underground iron ore mine in Sweden is 30–50% of the total operating cost. Spare parts availability, an issue of the maintenance process, is studied in this paper. Simply stated, production can be enhanced by the increased availability of functional machinery and the subsequent minimization of the total production cost. Spare parts estimation based on machine reliability characteristics and operating environment is a pragmatic method to improve supportability; it can guarantee non-delay in spare parts logistics which can ultimately improve production output. This study uses an improved statistical-reliability (S-R) approach which incorporates system/machine operating environment information in systems reliability analysis. It selects a multiple regression type of analysis based on Cox's proportional hazards modeling (PHM). It considers a parametric approach with a baseline Weibull hazard function and time independent covariates and analyzes the influence of operating environment factors on this model. Based on the results of analyses, a mathematical model for spare parts prediction in component level for non-repairable parts is developed and the findings are validated through a case study in the Swedish mining industry. The study finds that the outputs represent a significant difference in the required spare parts estimation when considering the influence of the system operating environment. The difference is significant in the sense of spare parts forecasting and inventory management; this can enhance the availability of parts and consequently of machines resulting in economical operation and cost savings.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124041129","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: 20

The Extended Continuous Evaluation reliability growth model 扩展连续评估可靠性增长模型

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5447998

L. H. Crow

{"title":"The Extended Continuous Evaluation reliability growth model","authors":"L. H. Crow","doi":"10.1109/RAMS.2010.5447998","DOIUrl":"https://doi.org/10.1109/RAMS.2010.5447998","url":null,"abstract":"In 2007 the Defense Science Board convened a Task Force to investigate and make recommendations on changes that would increase the reliability of military systems. In 2008 a report was issued by the Task Force which gives the Task Force findings and recommendations. The Task Force found that the “lack of continuous RAM improvement during design, and the resulting low initial MTBF and low Growth Potential are the most significant reasons that systems are failing to meet their operational suitability requirements.” In addition, the Task Force recommended that “RAM, to include a robust reliability growth program, be a mandatory contractual requirement and document progress as part of every major program review.” The Task Force also noted that, “More importantly, an operational perspective earlier in the developmental process has often proven to be a catalyst to early identification and correction of problems.” See Ref. 3. As a result of these finding it is clear that reliability growth tests need to be implemented and conducted closer to operational, real-word conditions in order to evaluate and grow the reliability under conditions close to actual use conditions. This is referred to as “Operational-Like” reliability growth test and represents a new direction within the Department of Defense. A structured Operational-Like reliability growth test would be testing conducted in accordance with the Mission Profile Testing methodology presented in Crow Ref. 2. The author, as a member of this Task Force, concurs with these findings and recommendations. This paper presents a model that is design for continuous reliability growth evaluation over a single or multiple test phases. The model has applications to reliability growth testing in general and is particularly appropriate for Operational-Like testing.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124467125","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

Calculating an appropriate multiplier for ßλ when modeling common cause failure in triplex systems 三工系统共因故障建模时，计算ßλ的适当乘法器

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5447996

J. Bukowski, Rudolph P. Chalupa

引用次数: 2

Development of an acceleration model for subsea pressure 开发海底压力加速度模型

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5448030

A. Thiraviam, T. Foley, L. Malone

{"title":"Development of an acceleration model for subsea pressure","authors":"A. Thiraviam, T. Foley, L. Malone","doi":"10.1109/RAMS.2010.5448030","DOIUrl":"https://doi.org/10.1109/RAMS.2010.5448030","url":null,"abstract":"Accelerated Life Testing (ALT) is an effective method of demonstrating and improving product reliability in applications where the products are expected to perform for a long period of time. ALT accelerates a given failure mode by testing at amplified stress level(s) in excess of operational limits. Statistical analysis (parameter estimation) is then performed on the data, based on an acceleration model to make life predictions at use level. The acceleration model thus forms the basis of accelerated life testing methodology. Well established accelerated models such as the Arrhenius model and the Inverse Power Law (IPL) model exist for key stresses such as temperature and voltage. But there are other stresses, failure mechanisms and special cases where there is no clear model of choice. One such scenario is the case where viscoelastic strain due to subsea pressure is the dominant failure mechanism. This paper presents the steps followed in the development of an acceleration model for subsea pressure. Although a final model has not been developed, the data obtained through a series of tests leads to an acceleration model that follows an exponential functional form. The life predictions based on the model also incorporate the use of field data. The test results were based on an accelerated life test performed over a period of one year and also includes several short term progressive stress tests. Further research on the development of the model includes independent testing to verify the true nature of acceleration of life through subsea pressure.","PeriodicalId":299782,"journal":{"name":"2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127154859","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: 2

Potential application of FORM and SORM for PRA FORM和SORM在PRA中的潜在应用

2010 Proceedings - Annual Reliability and Maintainability Symposium (RAMS) Pub Date : 2010-04-15 DOI: 10.1109/RAMS.2010.5448004

I. Miller, E. Zampino, S. Pai, V. Nagpal

引用次数: 0