{"title":"Quantification of Fault Trees with CCFs Using PINN","authors":"Joonseok Lim, G. Heo","doi":"10.1109/ICSRS56243.2022.10067505","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067505","url":null,"abstract":"Research is being conducted to quantify fault trees (FTs) using physics-informed neural networks (PINNs). Based on the previous study, this work attempted to quantify FTs considering common cause failures (CCFs). The binomial failure rate (BFR) model is used to obtain the failure rate data required for continuous-time Markov chain (CTMC) which takes a role of an objective function in PINN. For better training performance, it is necessary to reduce the size of Q matrix of CTMC. The proposed method compares the PINNs among an original Q matrix, a reduced Q matrix, and an exact solution. The proposed method not only reduced learning time, but also showed improved accuracy.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115337146","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}
{"title":"A Weakest T-Norm Based Fuzzy Fault Tree Approach for Probability Assessment of Natural Gas Pipeline","authors":"Yifei Wang, Chunya Su, Mingjiang Xie","doi":"10.1109/ICSRS56243.2022.10067575","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067575","url":null,"abstract":"To evaluate the failure probability of natural gas pipeline more accurately, this paper proposes a novel method by combing fuzzy fault tree and Bayesian network. Considering the fuzzy accumulation problem of traditional α-cut set fuzzy algorithm, the weakest t-norm trapezoidal fuzzy number algorithm is proposed. The prior failure probability of the natural gas pipeline system is obtained by applying the aggregation theory. On this basis, the inference algorithm of the Bayesian network is used to calculate the accident probability and to diagnose the node’s posterior probability. The sensitivity analysis is used to find the bottom events that have the greatest impact on the failure of natural gas pipelines. The results show that the model can not only effectively calculate the failure probability of natural gas pipeline, but also determine the key risk factors affecting pipeline’s failure. And the failure probability of the natural gas pipeline can be updated by adjusting the state and probability distribution of the nodes. The proposed method can provide a theoretical basis for prolonging the life of the pipeline and preventing corrosion.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121121752","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}
{"title":"The Comparison of Photocurrent and Luminance Degradation to Estimate the Lifetime of OLED","authors":"Jun-Tae Lee, Yo-Min Choi, Sang-Dae Kim","doi":"10.1109/ICSRS56243.2022.10067766","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067766","url":null,"abstract":"Organic Light Emitting Diode (OLED) degradation is one of the main issues that the industry has to face in order to make a reliable device having sufficiently long lifetime. The lifetime estimation method described in IEC 62341-5-3 was not proper for the OLED materials developers. Some OLED degradation testing systems equip with photodiode, and the photocurrent of test device can be monitored in real time. In this study, the photocurrent degradation was compared with the luminance degradation of OLED devices. The degradation curves using the photocurrent were similar to the curves from luminance measurement, and coefficients of photocurrent degradation and luminance degradation were very similar. The estimated lifetimes calculated from photocurrent degradation were also similar to the values calculated by luminance experimental data. So, it could be concluded that the photocurrent experimental data can be used to estimate the lifetime of OLEDs.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127238764","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}
Naser Kazemi Eilaki, Trond Nordvik, I. Heldal, Carolyn Ahmer, B. C. Hagen
{"title":"At-Risk People’s Safety in Fire Incidents: Insights Learned from Applying Reliability Index Method","authors":"Naser Kazemi Eilaki, Trond Nordvik, I. Heldal, Carolyn Ahmer, B. C. Hagen","doi":"10.1109/ICSRS56243.2022.10067757","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067757","url":null,"abstract":"Escaping from a fire to a safe place can take longer and be more difficult for people belonging to at-risk groups. While there are several models addressing uncertainty during evacuation, the effect of these on the elderly and people with disabilities, especially those people who are living alone is seldom exemplified. Considering a common type of detached two-story building with a prevalent layout, this paper illustrates how safety analysis can be developed for these groups based on the fire safety index method. The computations illustrate the probability of being trapped in fire (fatality) and safety index (beta index). The timeline evacuation model for two fire scenarios considers appropriate probability distribution functions for each variable with indeterministic nature. Sensitivity analysis of the variables has been done to find the most important and effective parameters for fire safety for the chosen at-risk groups. The response time to the fire, the area of buildings, and the length of escape route are the most important variables. Also, fire growth is more critical in homes without detection systems. The type of movement disability that needs different kinds of assistive tools, has no great effect on the safety level of people that live in the same home layout and people with visual impairment who need care staff to assist for evacuation encounter the same risk of fatality as other people with movement disabilities approximately.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125398837","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}
{"title":"Data-Driven Global Sensitivity Analysis Using the Arbitrary Polynomial Chaos Expansion Model","authors":"Qizhe Li, Hanyan Huang","doi":"10.1109/ICSRS56243.2022.10067257","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067257","url":null,"abstract":"Considering the existence of stochastic uncertainty, quantifying the failure probability of structural systems is one of the important subjects of reliability research, and global sensitivity analysis (GSA) has been widely utilized to estimate the influence of the uncertainty on the system failure probability. Polynomial Chaos Expansion (PCE), a kind of surrogate model, is often utilized to replace the original model considering the heavy calculation cost of GSA. However, the traditional PCE and Sobol’ method are not suitable for the situation that input variables of systems do not have complete probabilistic distribution functions. To solve this problem, a data-driven sensitivity analysis method is proposed in this paper. The surrogate model of the original model is constructed by arbitrary Polynomial Chaos Expansion (aPCE), and different order sensitivity indices of the actual systems are calculated by Sobol’ combining with the Monte Carlo simulation. Compared with the traditional Sobol’ method, the developed algorithm has a wider scope of application in practice. The experiment results show that the proposed method is an effective GSA tool when the distribution types of input variables are not completely known.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116619125","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}
{"title":"Concepts and Relationships in Safety and Security Ontologies: A Comparative Study","authors":"Malina Adach, Kaj Hänninen, K. Lundqvist","doi":"10.1109/ICSRS56243.2022.10067740","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067740","url":null,"abstract":"Safety and security ontologies quickly become essential support for integrating heterogeneous knowledge from various sources. Today, there is little standardization of ontologies and almost no discussion of how to compare concepts and their relationships, establish a general approach to create relationships or model them in general. However, concepts with similar names are not semantically similar or compatible in some cases. In this case, the problem of correspondence arises among the concepts and relationships found in the ontologies. To solve this problem, a comparison between the Hazard Ontology (HO) and the Combined Security Ontology (CSO) is proposed, in which the value of equivalence between their concepts and their relationships was extracted and analyzed. Although the HO covers the concepts related to the safety domain and the CSO includes securityrelated concepts, both are based on the Unified Foundational Ontology (UFO). For this study, HO and CSO were compared, and the results were summarized in the form of comparison tables. Our main contribution involves the comparisons among the concepts in HO and CSO to identify equivalences and differences between the two. Due to the increasing number of ontologies, their mapping, merging, and alignment are primary challenges in bridging the gaps that exist between the safety and security domains.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124289428","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}
Sajjad Feizhoseini, A. Davoodabadi, F. Hosseinpour, H. A. Arghand, M. Behzad, E. Zio
{"title":"Experimental Investigation of Failure Thresholds of Rolling Element Bearings","authors":"Sajjad Feizhoseini, A. Davoodabadi, F. Hosseinpour, H. A. Arghand, M. Behzad, E. Zio","doi":"10.1109/ICSRS56243.2022.10067686","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067686","url":null,"abstract":"The rolling element bearing (REB) is the most common mechanical element used in industrial machinery. Usually, in data-driven prognostic models for predicting the remaining useful life (RUL) of REBs, the failure threshold (FT) is assumed as a constant value of a statistical feature, such as root mean square (RMS), peak or kurtosis, extracted from vibration signals collected by sensors. The procedure to define the FT value is conservative and expert-based. In addition, FT is typically defined only with respect to one of the features. In this paper, to analyze the effect of the definition of FT by only one feature, the correlation of statistical features is studied on accelerated-life datasets of REBs. First, by reviewing the literature in the field of PHM and FT, features including peak, kurtosis, RMS, and level crossing rate are selected to be analyzed. Then, the correlation of these features is investigated on the PRONOSTIA and the Sharif University of Technology accelerated-life datasets. The results show that the correlation of features varies in the different tests of these datasets. As a result, in this paper, it is proposed that the FT is to be defined as a multi-feature fusion, which arises from the relationship between features. This proposed method helps resolve the ambiguity in defining the FT as a single fixed value.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114505103","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}
{"title":"Analysis of FBG Sensors Performances When Integrated Using Different Methods for Health and Structural Monitoring in Aerospace Applications","authors":"A. Aimasso, M. D. Vedova, P. Maggiore","doi":"10.1109/ICSRS56243.2022.10067392","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067392","url":null,"abstract":"Optical fiber transmission lines have seen an increase in number of applications in the aerospace sector. This growth is directly related to the new optical fiber-based technologies such as Fiber Bragg Gratings (FBG). FBGs are sensors created by periodically varying the refractive index of the fiber in which they are embedded. These sensors reflect a specific band of wavelengths (Bragg Wavelength): a physical change in the fiber containing the sensor results in a change of the BW. This experimental work has the objective of studying integration methods of fibers containing FBGs, in particular preloaded and non-preloaded fiber integration methods were compared. During the test campaign, a sample with preloaded and non-preloaded FBGs was put under static tests. This allowed the two mounting methods to be compared by analyzing the response of the sensors both under tension and compression load. The results showed that there is minimal difference in behaviour between sensors embedded in preloaded or non-preloaded fibers, allowing to define the non-preloaded strategy (really easier to realize) enough reliable.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123472567","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}
I. Alsyouf, A. Shikhli, Meera Almaazmi, K. Obaideen, F. Ibrahim
{"title":"Analyzing Factors Associated with Road Accidents Involving Taxi Drivers in the United Arab Emirates","authors":"I. Alsyouf, A. Shikhli, Meera Almaazmi, K. Obaideen, F. Ibrahim","doi":"10.1109/ICSRS56243.2022.10067698","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067698","url":null,"abstract":"Known for their high traffic congestion and dense populations, urban areas are more likely to experience road accidents. The United Arab Emirates (UAE) has some of the world’s most urbanized cities. In order to reduce road accidents in the UAE, the government has addressed, among other things, driving behaviors. Taxi drivers are particularly at risk of accidents due to long driving hours and fatigue. Accidents are not exclusively caused by drivers. Therefore, this study aims to investigate other contributing factors associated with taxi accidents in the UAE. Accident records covering the period of 2015 and 2021 were collected from an anonymous taxi company in the UAE. Using SPSS software, we analyzed the data to determine the annual trend of road accidents and the frequency distribution of each factor. It has been observed that accident rates have declined in recent years. According to the results, 88.4% of accidents were considered minor and caused small damage. Additionally, approximately 41% of the accidents happened between 8:01 AM and 4:00 PM, and over 50% involved drivers with less than 5 years of experience. Further, winter season accidents were slightly higher than other seasons. As a result of this study, governments and transportation authorities can better understand the factors causing taxi accidents. Additional factors can be considered, such as psychophysiological and sociodemographic factors as well as daily travel distances and working hours.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127297747","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}
{"title":"Monitoring of Synchronization Failure for Power Electronics Converters","authors":"Mohammed Ali Khan, J. Drapela","doi":"10.1109/ICSRS56243.2022.10067639","DOIUrl":"https://doi.org/10.1109/ICSRS56243.2022.10067639","url":null,"abstract":"The recent developments in the grid integration of power electronics converters have raised some serious concerns related to their synchronization. These concerns when unattended resulted in unintentional islanding of the distributed generation (DG) units and triggered the cyclic behavior of system disconnection. Hence, to overcome these drawbacks, timely detection of these synchronization failure with high accuracy is necessary. In this paper, the applicability of an advanced recurrent neural network that allows persistent information exchange is analyzed for distinguishing between the normal operation and synchronization failure in a converter network. To achieve this a long-short term memory (LSTM) autoencoder is designed as a classification approach and employed with the power converters operating in a network. The LSTM offers advantages with automated feature extraction and ranking which are the major aspects for improving the time detection of disturbances in a system with high accuracy. To develop this approach, a three-phase grid feeder integrating a three-phase rectifier with a three-phase inverter and a single-phase inverter is designed. Measurements and normal operation and synchronization failure are analyzed to train the algorithm. The trained algorithm is identified to achieve 99.49% training accuracy and 100 % testing accuracy with a detection time of 0.2 milliseconds.","PeriodicalId":413240,"journal":{"name":"2022 6th International Conference on System Reliability and Safety (ICSRS)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127479285","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}