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2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)最新文献

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Accelerated life testing of packaging box under multiple environmental stresses 多种环境应力下包装盒的加速寿命试验
Shuaishuai Zhao, Jie Zhou, K. Peng
To evaluate the life of a packaging box, accelerated life testing was conducted under multiple environmental stresses. Based on the potential failure mode and mechanism, sensitive stresses were determined in accelerated life testing. The method of events compression and increasing stress levels was used for accelerated life testing based on the life profile of packaging box. The test included an environmental aging test, a random vibration test, a fork transport test, an artificial dismounting test, a declivitous impact test, and a rotating edge drop test. The standard timing test statistical scheme was used to evaluate the life of packaging box. The results indicate that the lowest confidence limit of the life of a packaging box life is 9.94 year under 80% confidence level.
为了评估包装盒的寿命,在多种环境应力下进行了加速寿命试验。基于潜在失效模式和失效机理,在加速寿命试验中确定了敏感应力。基于包装盒的寿命曲线,采用事件压缩和应力水平递增的方法进行了加速寿命试验。试验包括环境老化试验、随机振动试验、叉运输试验、人工拆装试验、倾斜冲击试验和旋转边缘跌落试验。采用标准定时试验统计方案对包装盒的寿命进行评价。结果表明,在80%的置信水平下,包装盒寿命的最低置信限为9.94年。
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引用次数: 0
Software reliability growth model of reactor protection system based on ratio analysis of critical faults 基于临界故障比率分析的电抗器保护系统软件可靠性增长模型
Chao Guo, Shuqiao Zhou, Duo Li
The application of digital instrumentation and control systems in Nuclear Power Plants (NPPs) provides a series of advantages, but it also raises challenges in the reliability analysis of safety-critical systems in the NPPs. Software testing is one of the most significant processes to assure software reliability, and the safety-critical systems of NPPs are sensitive to the severity of software faults, especially the critical faults that infect the system function greatly. Previous software reliability models related to the analysis of fault severity were mostly based on the assumption of different severities. In this paper, the fault severity data collected during the software test process were used for modeling the test process with a Software Reliability Growth Model based on a non-homogeneous Poisson process. The mean value function was derived by considering the ratios of critical and non-critical faults and was named as “Ratio of Critical-Faults model” (RCF model). The fault data collected while developing the safety-critical system were used to validate this model. According to the analysis, RCF model had fitting abilities similar to that of the Goel-Okumoto model and Inflection S-shaped model whereas the prediction effect of the RCF model was better than that of these two models, especially when little data were collected, which could be used to determine the release time of the software.
数字仪表与控制系统在核电站中的应用带来了一系列优势,但也对核电站安全关键系统的可靠性分析提出了挑战。软件测试是保证软件可靠性的重要环节之一,核电站安全关键型系统对软件故障的严重程度非常敏感,尤其是对系统功能影响较大的关键故障。以往与故障严重程度分析相关的软件可靠性模型大多基于不同严重程度的假设。本文利用软件测试过程中收集的故障严重程度数据,建立了基于非齐次泊松过程的软件可靠性增长模型,对测试过程进行建模。通过考虑临界故障与非临界故障的比例,推导出该模型的均值函数,并将其命名为“临界故障比模型”(RCF模型)。在开发安全关键系统过程中收集的故障数据用于验证该模型。分析表明,RCF模型的拟合能力与Goel-Okumoto模型和Inflection s型模型相似,但RCF模型的预测效果优于这两种模型,特别是在数据采集较少的情况下,可以用来确定软件的发布时间。
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引用次数: 2
Area method used in the evaluation of resilience implementation approaches in system of systems 用面积法评价系统的弹性实施方法
Xing Pan, Yanjing Yang, Zhuo Jiang, Ye Lin
System of systems (SoS), like transportation systems and combat systems, is integrated by a set of independently operating systems that interact with each other to provide an end-to-end capability, which cannot be achieved by individual systems. Resilience is the ability of an SoS to recover to a desired performance level after disruptive events. Even though many measures have been proposed to evaluate resilience, there is no one general metric that can be used in all situations. Given that what we actually need is the performance process with time, this paper presents an area method to evaluate resilience by calculating the area below the performance curve after disruption. Meanwhile, we propose the SoS operating time, combined with the area method, to identify which of the recovered performance levels and the recovery speeds is more important according to different situations. Finally, the proposed research enables us to evaluate resilience implementation approaches and select the best one.
系统的系统(SoS),像运输系统和作战系统一样,由一组独立的操作系统集成,这些系统相互作用,提供端到端的能力,这是单个系统无法实现的。弹性是组织在破坏性事件发生后恢复到预期性能水平的能力。尽管已经提出了许多评估弹性的方法,但没有一个通用的度量标准可以在所有情况下使用。鉴于我们实际需要的是随时间变化的性能过程,本文提出了一种面积法,通过计算中断后性能曲线下的面积来评估弹性。同时,我们提出了SoS的运行时间,并结合面积法,根据不同的情况确定哪些恢复的性能水平和恢复速度更重要。最后,本文提出的研究使我们能够评估弹性实施方法并选择最佳方法。
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引用次数: 1
Reliability simulation analysis of satellite products 卫星产品可靠性仿真分析
Taibin Hu, Xiao Xiong
The reliability simulation modeling and analysis of satellite products were studied in this paper. In order to increase the reliability of satellite system, the important products can be design with redundancy structure. Reliability modeling is the basis for satellite reliability engineering. The function and configuration of satellite system is more and more complex, traditional reliability modeling method such as RBD is not applicable. Reliability simulation method can apply to complex system. The reliability simulation method and the basic steps are studied firstly. General reliability simulation models for most products are given, including serial model, parallel model, standby redundancy, voting model. Research is mainly focused on the reliability simulation methods of complex satellite products, such as ring redundancy for TWTAs, more than one redundancy form for gyroscopes, and more than one logic relationship for momentum wheels. Finally, reliability simulation result curves of one satellite system are given as an example.
本文对卫星产品可靠性仿真建模与分析进行了研究。为了提高卫星系统的可靠性,可以对重要产品进行冗余结构设计。可靠性建模是卫星可靠性工程的基础。卫星系统的功能和结构越来越复杂,传统的可靠性建模方法如RBD已不适用。可靠性仿真方法适用于复杂系统。首先研究了可靠性仿真的方法和基本步骤。给出了大多数产品的通用可靠性仿真模型,包括串行模型、并联模型、备用冗余模型、投票模型。主要研究twta的环形冗余、陀螺仪的多冗余形式、动量轮的多逻辑关系等复杂卫星产品的可靠性仿真方法。最后以某卫星系统为例,给出了可靠性仿真结果曲线。
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引用次数: 2
A model-driven testing framework based on requirement for embedded software 基于嵌入式软件需求的模型驱动测试框架
Haishen Lei, Yichen Wang
Based on hardware and software integration testing and model driven testing binding requirements, we propose a model based on the needs of embedded software driver initial framework to analyze and identify the needs of embedded systems hardware and software object creation object interaction model, then the model analysis and testing constraints and on the basis of test scenarios, and then establish MARTE model test requirements, test cases accordingly converted into XML model, obtain the initial set of test cases through model transformation algorithm and model checking, and finally the use of intelligent algorithms to obtain objective test set. Expectations for increasing demand for embedded software in line with the degree of automation of the verification process, the verification and running on the target machine's software to achieve high-level functions and needs consistency.
基于软硬件集成测试和模型驱动测试的需求绑定,提出了基于嵌入式软件驱动模型的需求初始框架,对嵌入式系统软硬件对象的需求进行分析和识别,创建对象交互模型,然后对模型进行约束和测试分析,并在此基础上给出测试场景,然后建立MARTE模型测试需求,将测试用例相应转换为XML模型;通过模型转换算法和模型检查获得初始测试用例集,最后利用智能算法获得客观测试集。期望嵌入式软件的需求符合越来越高的自动化程度,验证过程要与运行在目标机上的软件实现高级功能和需求的一致性。
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引用次数: 7
Response surface method and reliability calculation based on the generating function method 响应面法和基于生成函数法的可靠度计算
K. Sun, Jinyu Zhou
The generating function method is an important tool for the structural reliability analysis and performance assessment of multi-state systems. However, no corresponding solving method is available for implicit limited state functions. Therefore, a response surface method based on the generating function method is proposed, and its reliability is calculated. This method is improved based on the classical response surface method by using the present most dangerous point (minimum) of fitting the limited state function obtained as the design point and the expansion point of the next iteration, making the expansion point closer to the failure surface, enhancing the approximate precision of the limited state function near the failure surface, and providing a feasible way for calculating the system reliability in a highly precise manner with the generating function method of non-uniform discretization. Examples are provided to demonstrate that the new method improves the convergence rate and calculation accuracy and reduces the iterative and cumulative error.
生成函数法是多状态系统结构可靠性分析和性能评估的重要工具。而隐式有限状态函数没有相应的求解方法。为此,提出了一种基于生成函数法的响应面法,并对其可靠性进行了计算。该方法在经典响应面法的基础上进行了改进,将拟合得到的有限状态函数的当前最危险点(最小值)作为设计点和下一次迭代的展开点,使展开点更靠近失效面,提高了失效面附近有限状态函数的近似精度。采用非均匀离散化的生成函数法,为高精度地计算系统可靠度提供了可行的方法。算例表明,新方法提高了收敛速度和计算精度,减小了迭代和累积误差。
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引用次数: 0
Reliability assessment based on Bayesian networks for full authority digital engine control systems 基于贝叶斯网络的全授权数字发动机控制系统可靠性评估
Naixin Li, Zhong Lu, Jia Zhou
Full Authority Digital Engine Control (FADEC) systems are widely used in commercial aircraft engines nowadays and system reliability has an important effect on the safety of aircraft operation. A reliability analysis framework is proposed in this study. Bayesian networks (BNs) are used to obtain the reliability function of the system which is able to analyze FADEC systems in the continuous time domain. A practical FADEC system is provided to illustrate the effectiveness of our formalism. Compared with others, this formalism can analyze systems in the continuous time domain, and a multi-state characteristic can be described. The result shows that our BN based formalism is a powerful tool for reliability analysis of FADEC systems.
目前,全授权数字发动机控制系统(FADEC)广泛应用于商用飞机发动机,其可靠性对飞机的安全运行有着重要的影响。本文提出了一种可靠性分析框架。利用贝叶斯网络(BNs)得到系统的可靠性函数,使其能够在连续时域内分析FADEC系统。最后给出了一个实际的FADEC系统,说明了该方法的有效性。与其他形式相比,该形式可以在连续时域内分析系统,并且可以描述系统的多状态特征。结果表明,基于BN的形式化方法是FADEC系统可靠性分析的有力工具。
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引用次数: 2
Degradation process and lifetime evaluation of repairable and non-repairable systems subject to random shocks 随机冲击下可修与不可修系统的退化过程与寿命评估
Shuyang Guo, Yufeng Sun, Guangyan Zhao, Zhiwei Chen
This paper studies the degradation process of mechanical systems which are composed of multiple sub-systems which have been subjected to continuous wear and random shocks. We have developed a new mathematical model of series systems and established the function curve of each sub-system's degradation over time to evaluate the system's lifetime. Previous research mainly focused on simple non-repairable systems with multiple sub-systems which suffered from independent degradation processes, and held the view that systems can normally work only when the total degradation of each sub-system is less than the threshold level. This new model extends previous research by considering both a non-repairable system and a repairable system subject to multiple degradation processes, and these two types of systems will also fail when the degradation of the overall system is greater than the threshold level. The model is demonstrated on a specific example by means of Monte-Carlo simulation.
本文研究了由多个子系统组成的机械系统在连续磨损和随机冲击作用下的退化过程。建立了串联系统的数学模型,建立了各子系统随时间退化的函数曲线,对串联系统的寿命进行了评价。以往的研究主要集中在具有独立退化过程的多子系统的简单不可修复系统,认为只有各子系统的退化总量小于阈值水平时,系统才能正常工作。该模型扩展了以往的研究,同时考虑了不可修复系统和可修复系统存在多个退化过程,当整个系统的退化大于阈值水平时,这两种类型的系统也会失效。通过蒙特卡罗仿真对该模型进行了验证。
{"title":"Degradation process and lifetime evaluation of repairable and non-repairable systems subject to random shocks","authors":"Shuyang Guo, Yufeng Sun, Guangyan Zhao, Zhiwei Chen","doi":"10.1109/ICRMS.2016.8050038","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050038","url":null,"abstract":"This paper studies the degradation process of mechanical systems which are composed of multiple sub-systems which have been subjected to continuous wear and random shocks. We have developed a new mathematical model of series systems and established the function curve of each sub-system's degradation over time to evaluate the system's lifetime. Previous research mainly focused on simple non-repairable systems with multiple sub-systems which suffered from independent degradation processes, and held the view that systems can normally work only when the total degradation of each sub-system is less than the threshold level. This new model extends previous research by considering both a non-repairable system and a repairable system subject to multiple degradation processes, and these two types of systems will also fail when the degradation of the overall system is greater than the threshold level. The model is demonstrated on a specific example by means of Monte-Carlo simulation.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124512661","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
Reliability assessment of electric energy data collector 电能数据采集器可靠性评估
Feng Lin, J. Shao, Jianguo Miao, Jian Wu
Being instrumental in electric energy data collection for energy data collection and supervisory systems, the reliability of an electric energy collector not only affects the reliability of the system, but also directly influences users' satisfaction. With the objective of addressing the problem of reliability assessment of an electric energy data collector, the failure mechanism of the data collector was first identified, followed by a cyclical acceleration method, which includes a sub test known as step stress test. Based on the exponential distribution of the fault time of the electrical energy collector, the Gamma distribution was assumed as the prior distribution and a multilevel Bayesian no-failure data statistical analysis method was used to calculate the average life span of the collector using the experimental data. Further, we adopted the Arrhenius equation under temperature stress and the activation energy value of electronic products to calculate the reliable life expectancy of the electrical energy collector under the normal operating temperatures. Additionally, this method is suitable for other electric energy data collectors as the main structure and working principle are similar.
电能采集器作为电能数据采集和电能监控系统的重要工具,其可靠性不仅影响到系统的可靠性,而且直接影响到用户的满意度。为了解决电能数据采集器的可靠性评估问题,首先确定了数据采集器的失效机制,然后采用循环加速方法,其中包括一个称为阶梯应力测试的子测试。基于电能集热器故障时间的指数分布,假设伽玛分布为先验分布,利用实验数据采用多水平贝叶斯无故障数据统计分析方法计算集热器的平均寿命。进一步,我们采用温度应力下的Arrhenius方程和电子产品的活化能值来计算电能集热器在正常工作温度下的可靠寿命。此外,由于主要结构和工作原理相似,该方法也适用于其他电能数据采集器。
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引用次数: 0
Cascading failure of interdependent networks with traffic: Using a redundancy design to protect influential nodes 具有流量的相互依赖网络的级联故障:使用冗余设计来保护有影响的节点
Lijun Liu, Yongfeng Yin, Zenghu Zhang
With the rapid development of technology, several infrastructure networks are often coupled together and thus need to be modeled as interdependent networks. Because of potential overloads, interdependent networks are more fragile when suffering from attacks. Existing studies have primarily concentrated on the cascading failure process of interdependent networks without load, or the robustness of isolated network with traffic. Only limited research have been done on the cascading failure process caused by overload in interdependent networks. Redundancy is a primary design approach that can enhance the reliability and robustness of the system. In this paper, we propose a method that adds redundant design for the influential nodes in interdependent networks with traffic to suppress overloading. First, a detailed model with a redundant design and redundant level is introduced. Three strategies (Random, Degree and Betweenness) based on the potential knowledge of network centrality can be used to identify the influential nodes of networks. Then, two indicators are presented to evaluate the robustness of interdependent networks. Lastly, we analyze the common effects between the coupling strength and the redundancy on the invulnerability of interdependent networks. Experiments on two interdependent networks demonstrate that with a suitable coupling attributes (strength and preference) and a higher degree of redundancy, an interdependent network is more robust under random attacks. The results suggest that such a redundant design can permit construction of highly robust interactive networked systems.
随着技术的快速发展,多个基础设施网络经常耦合在一起,因此需要将其建模为相互依赖的网络。由于潜在的过载,相互依赖的网络在遭受攻击时更加脆弱。现有的研究主要集中在无负载的相互依赖网络的级联失效过程,或有流量的孤立网络的鲁棒性。对相互依赖网络中过载引起的级联失效过程的研究有限。冗余是提高系统可靠性和鲁棒性的主要设计方法。本文提出了一种在具有流量的相互依赖网络中对有影响的节点增加冗余设计以抑制过载的方法。首先,介绍了一个具有冗余设计和冗余级别的详细模型。基于网络中心性潜在知识的三种策略(Random、Degree和betweness)可用于识别网络的影响节点。然后,提出了两个指标来评估相互依赖网络的鲁棒性。最后,我们分析了耦合强度和冗余对相互依赖网络的抗灾性的共同影响。在两个相互依赖网络上的实验表明,具有合适的耦合属性(强度和偏好)和较高的冗余度,相互依赖网络在随机攻击下具有更强的鲁棒性。结果表明,这种冗余设计可以允许构建高度健壮的交互式网络系统。
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引用次数: 0
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2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)
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