International Journal of Reliability, Risk and Safety: Theory and Application最新文献_第2页

Assessment of Spare Parts Requirement by Reliability: A Case Study 备件需求可靠性评估:一个案例研究

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.2

Ali Nouri Qarahasanlou, Reza ShakorShahabi, Negar Fallahnejad

{"title":"Assessment of Spare Parts Requirement by Reliability: A Case Study","authors":"Ali Nouri Qarahasanlou, Reza ShakorShahabi, Negar Fallahnejad","doi":"10.30699/ijrrs.5.1.2","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.2","url":null,"abstract":"Spare parts provision is a complex problem and requires an accurate model to analyze all factors that may affect the required number of spare parts. The number of spare parts required for an item can be effectively estimated based on its reliability. The reliability characteristics of an item are influenced by different factors such as the operational environment, maintenance policy, operator skill, etc. However, in most reliability-based spare parts provision (RSPP) studies, the effect of these influence factors has not been considered. Hence, the statistical approach selected for reliability performance analysis must be able to handle the effect of these factors. One of the important models for reliability analysis by considering risk factors is the proportional hazard model (PHM), which has received less attention in the field of spare parts provisioning. Thus, this paper aims to demonstrate the application of the available reliability models with covariates in the field of spare part predictions using a case study. The proposed approach was evaluated with data from the system of fleet loading of the Jajarm Bauxite mine in Iran. The outputs represent a significant difference in spare parts forecasting and inventory management when considering covariates.","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115847945","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

Acoustic Emission Characteristics Determination for Online Structural Monitoring of Fatigue Crack Growth inAluminium Alloy 2025 2025铝合金疲劳裂纹扩展在线结构监测的声发射特性测定

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.5

Javad Sharifi Ghaderi, M. Ahmadi Najafabadi

引用次数: 0

Analysis of Discrete Fix Up Limit Time of Two Systems Prediction 两系统预测的离散修正极限时间分析

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.1

Tijjani A. Waziri

引用次数: 0

Prediction of Wear Failure in Journalpin Bearings 轴向销轴承磨损失效预测

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.3

H. Karimaei

{"title":"Prediction of Wear Failure in Journalpin Bearings","authors":"H. Karimaei","doi":"10.30699/ijrrs.5.1.3","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.3","url":null,"abstract":"Wear damage is a common failure in engine bearing shells. Wear failure induces changes in the bearing geometry and affects the oil film pressure and the durability of bearing shells. In this paper, wear failure in journalpin (main) bearings of a reciprocating engine is studied. Using a dynamic model, forces and torques in the journalpin bearings have been calculated and used in the analysis. To calculate the lubricating characteristics of the bearing, such as minimum oil film thickness and maximum oil film pressure, the Elasto-HydroDynamic (EHD) model that incorporate mass conservation algorithms is utilized. Wear failure in journalpin bearings of a reciprocating engine is assessed and the results are presented. Archard’s model is used as a wear model of journalpin-bearing material. The asperity interaction of two rough surfaces is considered by the boundary lubrication model. The results show that the wear rate at the initial stage of engine running is high. The results indicate that the main reason for wear in the journalpin bearings is the applied torque on the bearing, leading to edge wear. In a V-12 or 6Inline engine, journalpin bearing number 4 has the highest amount of torque applied and therefore has the highest amount of wear.","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"3 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130763825","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

Aviation Safety International Standards in the Framework of National Air Law 国家航空法框架下的航空安全国际标准

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.8

H. Kazemi

{"title":"Aviation Safety International Standards in the Framework of National Air Law","authors":"H. Kazemi","doi":"10.30699/ijrrs.5.1.8","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.8","url":null,"abstract":"Expansion of aviation is not achievable without regulating and improving air safety worldwide. Air safety in aviation has always been associated with approving and implementing national and international laws, regulations and standards. The international aviation community has approved uniform safety regulations under treaties, bilateral agreements, and internationally required standards. The international civil aviation organization (ICAO) is continuously updating standards following the development of aviation technologies. However, implementing international air safety standards involves compliance with and implementation of the regulations by the states in their air transportation. With the adoption and updating of international air standards of ICAO, do the member states comply with them? Member States are not in the same status regarding the development of the aviation industry. Various political, economic, and technical factors impede countries' correct and appropriate implementation of standards. Hence, the member countries should obtain a legal method so that the international technical air standards in their aviation industry become mandatory. However, they should adopt these standards under national law and harmonize them with international air standards. Formulating them under national law is the preferred way to comply with these uniform international safety standards. To accomplish this, the relevant national legal and regulatory infrastructure for air regulations should be established in all states. The author first explains the theoretical and practical basis of developing comprehensive international aviation safety standards and then describes the mechanism and process of approving these standards in the framework of the national code.","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130355345","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

Fault-tolerant Sliding Mode Controller and Active Vibration Control Design for Attitude Stabilization of a Flexible Spacecraft in the Presence of Bounded Disturbances 存在有界扰动的柔性航天器姿态稳定容错滑模控制器与主动振动控制设计

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.11

Marzieh Eghlimi, M. Azimi, Alireza Alikhani

{"title":"Fault-tolerant Sliding Mode Controller and Active Vibration Control Design for Attitude Stabilization of a Flexible Spacecraft in the Presence of Bounded Disturbances","authors":"Marzieh Eghlimi, M. Azimi, Alireza Alikhani","doi":"10.30699/ijrrs.5.1.11","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.11","url":null,"abstract":"This paper concerns vibration control and attitude stabilization of a flexible spacecraft with faulty actuators. The PID-based sliding mode fault-tolerant scheme is developed to preserve the system against bounded external disturbances, rigid-flexible body interactions, and partial actuator failures. The proposed control law, which combines the advantages of the PID and SMC, is proposed to enhance the robustness and reduce the steady state errors while reducing complexity and the computational burden and preserving the great properties of the SMC controller. It has been shown that the SMC controller is effective in accommodating different actuator fault scenarios and behaves healthily. Additionally, an active vibration control (AVC) law utilizing a strain rate feedback (SRF) algorithm and piezoelectric (PZT) sensors/actuators is activated during the maneuver to compensate for residual vibrations resulting from attitude dynamics and actuator failures. Numerical simulations demonstrate the proposed schemes' superiority in fault tolerance and robustness compared to conventional approaches .","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"310 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115913258","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

Nonparametric Estimation of the Family of Risk Measures Based on Progressive Type ll Censored Data 基于渐进式ii型截尾数据的风险测度族非参数估计

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.9

F. Yousefzadeh

{"title":"Nonparametric Estimation of the Family of Risk Measures Based on Progressive Type ll Censored Data","authors":"F. Yousefzadeh","doi":"10.30699/ijrrs.5.1.9","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.9","url":null,"abstract":"Tail risk analysis plays a central strategic role in risk management and focuses on the problem of risk measurement in the tail regions of extreme risks. As one crucial task in tail risk analysis for risk management, the measurement of tail risk variability is less addressed in the literature. Neither the theoretical results nor inference methods are fully developed, which results in the difficulty of modeling implementation. Practitioners are then short of measurement methods to understand and evaluate tail risks, even when they have large amounts of valuable data in hand. In this paper, some nonparametric methods of estimation for the class of variability measures among proportional hazards models based on progressively Type-II censored data are derived. We showed some properties of these estimators. Simulation studies have been performed to see the effectiveness of the proposed methods, and a real data set has been analyzed for illustrative purposes. Some well-known variability measures, such as the Gini mean difference, the Wang right tail deviation and the cumulative residual entropy, are, up to a scale factor, in this class.","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"411 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133382635","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

A Novel Method for Software Reliability Assessment via Neuro-Fuzzy System 基于神经模糊系统的软件可靠性评估新方法

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.6

E. Babaie

{"title":"A Novel Method for Software Reliability Assessment via Neuro-Fuzzy System","authors":"E. Babaie","doi":"10.30699/ijrrs.5.1.6","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.6","url":null,"abstract":"Nowadays, the utilization of software engineering in various areas of technology is remarkably increased. As a matter of fact, it is used in many critical applications such as eye surgery, autopilot systems of airplanes, centralized traffic control (CTC), and so on. Therefore, the reliability of software is very important, and it plays an essential role in the lifetime of the software. Software reliability is one of the main characteristics of software quality. Moreover, the rapid assessment of the reliability of the application is essential during the software life cycle. In this paper, I use the neuro-fuzzy methods to assess the software's reliability in order to cope with uncertainties in measuring the actual parameters of the software. By designing neuro-fuzzy inference systems and applying four parameters of the ISO/IEC 9126quality model(i.e., the maturity of software, fault-tolerant, recoverability, and reliability compliance) and finding the parameters of a fuzzy system by exploiting approximation techniques from neural networks, I present an integrated assessment model for evaluation of software reliability. The case study used in this paper to evaluate the proposed method is the software income tax calculator. By applying the input parameters, I observe that the software reliability is 0.65. software reliability in our proposed method is more exact than software reliability in the fuzzy multi-criteria and fuzzy method because The weights of the input parameters have been set by experts and software developers, and simulations are carried out using MATLAB tool (ANFIS). Simulations confirm that the proposed method provides acceptable results.","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133402073","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

Failure Mode and Effects Analysis on the Hydraulic System of Aircraft Ilyushin-76 伊尔76型飞机液压系统失效模式及影响分析

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.7

Heshmat Mohamad Khanlo, Ali Mohammad Mahmodi Kohan

{"title":"Failure Mode and Effects Analysis on the Hydraulic System of Aircraft Ilyushin-76","authors":"Heshmat Mohamad Khanlo, Ali Mohammad Mahmodi Kohan","doi":"10.30699/ijrrs.5.1.7","DOIUrl":"https://doi.org/10.30699/ijrrs.5.1.7","url":null,"abstract":"The emergence of accidents in industrial and aerospace environments has increased with the increase of activities in this field and the use of machinery. In traditional systems, after accidents and irreparable damage occur, research is done to investigate the defects and their causes. But today, due to the existence of different methods of hazard identification and risk assessment, before the occurrence of accidents, it is possible to identify accident hotspots and critical areas and to prevent and control them. Reviewing the analysis of failure modes and their effects (FMEA) is one of the industry's common risk assessment methods. Its purpose is to analyze the failure to obtain a comprehensive repair program that leads to the continuation of the operation of physical assets. In this study, with the help of the FMEA method, the risk priority number of the Ilyushin-76 aircraft hydraulic system was calculated, and its critical parts were identified. Due to the shortcomings of the usual risk priority number in the FMEA method, side methods of aggregation of ideas and Schaefer evidence theory were used to calculate the risk priority number. Using these methods, involving probabilities in the expression of opinion, the results of determining critical components became closer to reality. From the results obtained from the study and evaluation of critical components by the two usual RPN methods and Schaefer evidence theory, nine highly critical components are obtained jointly.","PeriodicalId":395350,"journal":{"name":"International Journal of Reliability, Risk and Safety: Theory and Application","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134068217","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 Mixed Integer Model for Unrelated Parallel Machine Scheduling with Job Deteriorating Effect 具有作业退化效应的不相关并行机器调度的混合整数模型

International Journal of Reliability, Risk and Safety: Theory and Application Pub Date : 2022-06-01 DOI: 10.30699/ijrrs.5.1.10

M. Sheikhalishahi, M. Zhalechian

引用次数: 1