Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)最新文献_第5页

Reliability improvement of airport ground transportation vehicles using neural networks to anticipate system failure 基于神经网络的机场地面运输车辆故障预测可靠性研究

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981623

A.E. Smith, D. Coit, C. W. Mccullers

{"title":"Reliability improvement of airport ground transportation vehicles using neural networks to anticipate system failure","authors":"A.E. Smith, D. Coit, C. W. Mccullers","doi":"10.1109/RAMS.2002.981623","DOIUrl":"https://doi.org/10.1109/RAMS.2002.981623","url":null,"abstract":"This paper describes a joint industry/university collaboration to develop a prototype system to provide real time monitoring of an airport ground transportation vehicle with the objectives of improving availability and minimizing field failures by estimating the proper timing for condition-based maintenance. Hardware for the vehicle was designed, developed and tested to monitor door characteristics (voltage and current through the motor that opens and closes the doors and door movement time and position), to quickly predict degraded performance, and to anticipate failures. A combined statistical and neural network approach was implemented. The neural network \"learns\" the differences among door sets and can be tuned quite easily through this learning. Signals are processed in real time and combined with previous monitoring data to estimate, using the neural network, the condition of the door set relative to maintenance needs. The prototype system was installed on several vehicle door sets at the Pittsburgh International Airport and successfully tested for several months under simulated and actual operating conditions. Preliminary results indicate that improved operational reliability and availability can be achieved.","PeriodicalId":395613,"journal":{"name":"Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123962204","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: 7

Modelling of maintenance, within discrete event simulation 建模维护，在离散事件模拟

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981652

L. Warrington, J.A. Jones, N. Davis

{"title":"Modelling of maintenance, within discrete event simulation","authors":"L. Warrington, J.A. Jones, N. Davis","doi":"10.1109/RAMS.2002.981652","DOIUrl":"https://doi.org/10.1109/RAMS.2002.981652","url":null,"abstract":"The concept of maintenance free operating periods (MFOP) requires co-ordination of failure avoidance, failure anticipation and maintenance delay techniques, with the objective of enhancing operational capability in a cost-effective manner. Individual aspects might be modelled mathematically but discrete event simulation is required for an analysis with the necessary fidelity. The ultra reliable aircraft model (URAM) is an aircraft reliability and maintenance discrete event simulation designed to investigate MFOP concepts. Analysis during its development identified several important factors pertaining to maintenance: Allocation and scheduling of resource; maintenance objectives and their operational & time-based over-ride; forward planning of scheduled & prognostics based maintenance; diagnostics, covering both fault visibility & isolation; task prioritisation, based on system structural importance, criticality importance, time & cost. These have been successfully implemented, making URAM an efficient and representative simulation of aircraft reliability, maintenance support and operational tasking. The factors and their implementation in URAM may easily be transferred to discrete event simulation of other complex assets such as ships and railway systems.","PeriodicalId":395613,"journal":{"name":"Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115137210","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: 42

Reliability tests on power devices 电力设备可靠性试验

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981711

J. Marcos, J. Pallás, S. Fernandez-Gomez

{"title":"Reliability tests on power devices","authors":"J. Marcos, J. Pallás, S. Fernandez-Gomez","doi":"10.1109/RAMS.2002.981711","DOIUrl":"https://doi.org/10.1109/RAMS.2002.981711","url":null,"abstract":"System dependability has become an important aspect to consider because of the large number of components included in modern systems and the high availability requirements that users demand. In systems such as switch-mode power supplies, power devices like IGBTs play a fundamental role in system functionality and performance, hence the use of reliable components is key. In this paper, the design of dependable systems based on reliable power devices is addressed. Reliability tests have been carried out on a set of IGBTs used in a battery charger to extract accurate reliability prediction models for this type of devices and degradation models, which can help the system designer to generate highly dependable systems. This paper describes the first phase of the authors' research that focus on determining degradation models for IGBTs due to environmental causes. Their tests show the high resistance of the selected devices to environmental stress. None of the devices has failed the tests, and the variation in their electrical characteristics is minimal. This is an important conclusion because our final objective is the design of reliable battery chargers, which requires the use of power devices that can tolerate high stress without degradation of their characteristics. In addition, they were able to detect a flaw in their measurement methodology that helped them to improve their test and analysis flow for the second phase of their research.","PeriodicalId":395613,"journal":{"name":"Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126933921","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: 11

On reliability modeling and analysis of highly-reliable large systems 高可靠大型系统的可靠性建模与分析

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981685

J. Loman, Wendai Wang

引用次数: 16

A discrete-event simulator for predicting outage time and costs as a function of maintenance resources 一个离散事件模拟器，用于预测停机时间和成本作为维护资源的函数

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981710

M. Hecht, J. Handal

{"title":"A discrete-event simulator for predicting outage time and costs as a function of maintenance resources","authors":"M. Hecht, J. Handal","doi":"10.1109/RAMS.2002.981710","DOIUrl":"https://doi.org/10.1109/RAMS.2002.981710","url":null,"abstract":"With the increasing air traffic and growth of deployed FAA equipment, high equipment availability and low outage time is also becoming more important. While the use of simulation models and simple queuing models for assessing the impact of staffing on availability has been available for more than 5 decades, it has not been widely used because of the cost and complexity of implementation. This paper presents an analytical model and software tool that can be used by non-experts to relate FAA maintenance resources including staffing, training, shift allocation, and geographical deployment to National Airspace System (NAS) facility and service downtime and availability. The analytical methodology and tool presented in this paper make it possible for any user to rapidly assess how changes in staffing, training. equipment count, and reliability will impact outage time, availability, maintenance backlog and technician utilization. It allows users to easily perform parametric studies on a variety of \"what if\" scenarios related to economics and capacity. The most significant benefit is that these results can now be made available to analysts and decision makers. The net result will be more informed decisions to account for the impact of maintenance resources on NAS capacity and overall economics.","PeriodicalId":395613,"journal":{"name":"Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121867952","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

An approach for understanding and testing third party software components 一种理解和测试第三方软件组件的方法

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981657

J. M. Haddox, G. M. Kapfhammer

{"title":"An approach for understanding and testing third party software components","authors":"J. M. Haddox, G. M. Kapfhammer","doi":"10.1109/RAMS.2002.981657","DOIUrl":"https://doi.org/10.1109/RAMS.2002.981657","url":null,"abstract":"In this paper we present an approach to mitigating software risk by understanding and testing third party, or commercial-off-the-shelf (COTS), software components. Our approach, based on the notion of software wrapping, gives system integrators an improved understanding of how a COTS component behaves within a particular system. Our approach to wrapping allows the data flowing into and out of the component at the public interface level to be intercepted. Using our wrapping approach, developers can apply testing techniques such as fault injection, data collection and, assertion checking to components whose source code is unavailable. We have created a methodology for using software wrapping in conjunction with data collection, fault injection, and assertion checking to test the interaction between a component and the rest of the application. The methodology seeks to identify locations in the program where the system's interaction with COTS components could be problematic. Furthermore, we have developed a prototype that implements,our methodology for Java applications. The goal of this process is to allow the developers to identify scenarios where the interaction between COTS software and the system could result in system failure. We believe that the technology we have developed is an important step towards easing the process of using COTS components in the building and maintenance of software systems.","PeriodicalId":395613,"journal":{"name":"Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130394294","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: 33

Integrated system for reliability-modeling of cold plastic deformation tools used in car industry 汽车冷塑性变形工具可靠性综合建模系统

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981644

C. Băban, I. Radu, M. Baban

{"title":"Integrated system for reliability-modeling of cold plastic deformation tools used in car industry","authors":"C. Băban, I. Radu, M. Baban","doi":"10.1109/RAMS.2002.981644","DOIUrl":"https://doi.org/10.1109/RAMS.2002.981644","url":null,"abstract":"In this paper, the reliability assurance of the cold plastic deformation tools used in the car industry was performed by reliability modeling, inspection planning and renewal policies. At the beginning of the paper, a data acquisition system for the measurement of the tools failure was developed. Using the experimental information obtained by the data acquisition system, the global reliability analysis of the equipment was performed by the Kolmogorov-Smirnov goodness-of-fit test. After the reliability modeling, the inspection planning and renewal policies were achieved. The acquisition and the processing of the experimental data, the global reliability modeling, the inspection planning and the renewal policy were performed by an integrated software system developed by the authors. This integrated software system was used for the reliability modeling of a combined stamping die used in the car industry. In conclusion, the reliability modeling of the cold plastic deformation tools used in the car industry allows the estimation of the reliability measures of these tools. The inspection and renewal policy may be designed and the reliability assurance can be achieved.","PeriodicalId":395613,"journal":{"name":"Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130539626","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: 8

A simple graphical approach for comparing reliability trends of different units in a fleet 比较机队中不同部件可靠性趋势的简单图解方法

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981617

L. Tang, M. Xie

引用次数: 2

Utility of popular software defect models 流行的软件缺陷模型的实用性

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981659

P. Hartman

引用次数: 6

The future of reliability engineering as a profession 可靠性工程作为一种职业的未来

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI: 10.1109/RAMS.2002.981680

K. Kapur

引用次数: 1