Eksploatacja I Niezawodnosc-Maintenance and Reliability最新文献_第10页

Investigation of the influence of transit time on a multistate transportation network in tourism 旅游中过境时间对多状态交通网络影响的研究

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-09-09 DOI: 10.17531/ein.2021.4.9

Thi-Phuong Nguyen, Yi-Kuei Lin

引用次数: 1

Evaluation of efficiency and reliability of airport processes using simulation tools 使用模拟工具评估机场流程的效率和可靠性

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-09-03 DOI: 10.17531/ein.2021.4.8

P. Gołda, T. Zawisza, M. Izdebski

引用次数: 8

A fault tree-based approach for aviation risk analysis considering mental workload overload 基于故障树的精神负荷航空风险分析方法

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-09-03 DOI: 10.17531/ein.2021.4.7

Haiyang Che, S. Zeng, Qidong You, Yueheng Song, Jianbin Guo

引用次数: 7

Study of energy consumption of a hybrid vehicle in real-world conditions 混合动力汽车在实际工况下的能量消耗研究

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-08-31 DOI: 10.17531/ein.2021.4.6

J. Mamala, M. Graba, A. Bieniek, K. Prażnowski, A. Augustynowicz, M. Śmieja

引用次数: 9

Reliability modeling for dependent competing failure processes with phase-type distribution considering changing degradation rate 考虑退化率变化的相型分布相依竞争失效过程可靠性建模

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-08-27 DOI: 10.17531/ein.2021.4.5

H-Y. Lyu, Shuai Wang, Xiaowen Zhang, Zaiyou Yang, Michael G. Pecht

{"title":"Reliability modeling for dependent competing failure processes with phase-type distribution considering changing degradation rate","authors":"H-Y. Lyu, Shuai Wang, Xiaowen Zhang, Zaiyou Yang, Michael G. Pecht","doi":"10.17531/ein.2021.4.5","DOIUrl":"https://doi.org/10.17531/ein.2021.4.5","url":null,"abstract":"In this paper, a system reliability model subject to Dependent Competing Failure Processes (DCFP) with phase-type (PH) distribution considering changing degradation rate is proposed. When the sum of continuous degradation and sudden degradation exceeds the soft failure threshold, soft failure occurs. The interarrival time between two successive shocks and total number of shocks before hard failure occurring follow the continuous PH distribution and discrete PH distribution, respectively. The hard failure reliability is calculated using the PH distribution survival function. Due to the shock on soft failure process, the degradation rate of soft failure will increase. When the number of shocks reaches a specific value, degradation rate changes. The hard failure is calculated by the extreme shock model, cumulative shock model, and run shock model, respectively. The closed-form reliability function is derived combining with the hard and soft failure reliability model. Finally, a Micro-Electro-Mechanical System (MEMS) demonstrates the effectiveness of the proposed model.","PeriodicalId":50549,"journal":{"name":"Eksploatacja I Niezawodnosc-Maintenance and Reliability","volume":"33 1 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2021-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90450512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Use of emission indicators related to CO2 emissions in the ecological assessment of an agricultural tractor 农用拖拉机生态评价中二氧化碳排放指标的使用

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-08-23 DOI: 10.17531/ein.2021.4.2

Łukasz Rymaniak, J. Merkisz, Natalia Szymlet, Michalina Kamińska, S. Weymann

{"title":"Use of emission indicators related to CO2 emissions in the ecological assessment of an agricultural tractor","authors":"Łukasz Rymaniak, J. Merkisz, Natalia Szymlet, Michalina Kamińska, S. Weymann","doi":"10.17531/ein.2021.4.2","DOIUrl":"https://doi.org/10.17531/ein.2021.4.2","url":null,"abstract":"The paper presents the proposed proprietary M exhaust emission indicator, which is based on the assumption that CO2 emissions are a measure of the correctness of the combustion process. The measurements were performed using a farm tractor meeting the Tier 3 emission norm, operated in real conditions during plowing work. The tests were carried out for a given land section at three speeds In the analysis of test results, the net engine work was used, as it is carried out in the type approval procedures. When measuring in real operating conditions, the torque read from the OBD system is overstated because it takes into account the engine’s internal resistance. In the analysis of test results, the fuel consumption, emission indicators of gaseous compounds and particulates were determined, and the best conditions for conducting agricultural works were indicated in terms of their impact on the natural environment. The aim of the work is to verify the possibility of determining the emission index for an off-road vehicle and a comparative analysis of its values for various operating parameters of a farm tractor. On this basis, it was found that the lowest values of the M identity were recorded for the test characterized by a vehicle speed of 15 km/h.","PeriodicalId":50549,"journal":{"name":"Eksploatacja I Niezawodnosc-Maintenance and Reliability","volume":"46 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75570668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Influence of meteorological conditions on road accidents. A model for observations with excess zeros 气象条件对道路交通事故的影响。有多余零的观测值的模型

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-07-09 DOI: 10.17531/EIN.2021.3.20

A. Borucka, D. Pyza

引用次数: 6

Enhancing machining accuracy reliability of multi-axis CNC machine tools using an advanced importance sampling method 采用先进的重要采样方法提高多轴数控机床的加工精度可靠性

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-07-07 DOI: 10.17531/EIN.2021.3.17

Zhiming Wang, Hao Yuan

引用次数: 2

Method of reconstructing dynamic load characteristics for durability test of heavysemitrailer under different road conditions 不同路况下重型半挂车耐久性试验动载特性重构方法

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-07-07 DOI: 10.17531/EIN.2021.3.16

Arkadiusz Czarnuch, Marek Stembalski, T. Szydłowski, Damain Batory

{"title":"Method of reconstructing dynamic load characteristics for durability test of heavy\u0000semitrailer under different road conditions","authors":"Arkadiusz Czarnuch, Marek Stembalski, T. Szydłowski, Damain Batory","doi":"10.17531/EIN.2021.3.16","DOIUrl":"https://doi.org/10.17531/EIN.2021.3.16","url":null,"abstract":"The aim of the article is to present and validate a methodology for collecting road load data on a vehicle, driving on roads and analysis of a drive data signal under the wheel in the time domain, using FRF (Frequency Response Function) and the MTS 320 eight-poster inertia reacted road simulator. The elaborated drive data, was used to control the actuators forcing the movements of the wheels and the coupling part of the semi-trailer during durability tests. The road tests were carried out by registering physical variables in the time domain, by a set of sensors mounted on a vehicle. The data was collected from roads categorized as motorways, national and local roads. Differences between the variability of the parameters, collected on the roads and the variability of the drive data under the wheel, were determined for the particular types of roads, for loaded and unloaded vehicle. The obtained accuracy of reconstruction of the road load data conditions was as high as 97%. Therefore, the proposed method is suitable for reliable durability tests with use of the road simulator.","PeriodicalId":50549,"journal":{"name":"Eksploatacja I Niezawodnosc-Maintenance and Reliability","volume":"16 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90744418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Predicting length of fatigue cracks by means of machine learning algorithms in the small-data regime 基于机器学习算法的小数据状态下疲劳裂纹长度预测

IF 2.5 3区工程技术

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-07-07 DOI: 10.17531/EIN.2021.3.19

Maciej Badora, Marzia Sepe, M. Bielecki, A. Graziano, T. Szolc

{"title":"Predicting length of fatigue cracks by means of machine learning algorithms in the small-data regime","authors":"Maciej Badora, Marzia Sepe, M. Bielecki, A. Graziano, T. Szolc","doi":"10.17531/EIN.2021.3.19","DOIUrl":"https://doi.org/10.17531/EIN.2021.3.19","url":null,"abstract":"In this paper several statistical learning algorithms are used to predict the maximal length of fatigue cracks based on a sample composed of 31 observations. The small-data regime is still a problem for many professionals, especially in the areas where failures occur rarely. The analyzed object is a high-pressure Nozzle of a heavy-duty gas turbine. Operating parameters of the engines are used for the regression analysis. The following algorithms are used in this work: multiple linear and polynomial regression, random forest, kernel-based methods, AdaBoost and extreme gradient boosting and artificial neural networks. A substantial part of the paper provides advice on the effective selection of features. The paper explains how to process the dataset in order to reduce uncertainty; thus, simplifying the analysis of the results. The proposed loss and cost functions are custom and promote solutions accurately predicting the longest cracks. The obtained results confirm that some of the algorithms can accurately predict maximal lengths of the fatigue cracks, even if the sample is small.","PeriodicalId":50549,"journal":{"name":"Eksploatacja I Niezawodnosc-Maintenance and Reliability","volume":"43 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74979723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3