Diagnostyka最新文献_第3页

Health monitoring of composite car roof failure under effect of different impact velocity 不同冲击速度下复合材料汽车车顶失效的健康监测

Diagnostyka Pub Date : 2023-10-19 DOI: 10.29354/diag/174100

Ahmed Raee Madeh, Nabel Kadum Abd-Ali

引用次数: 0

A novel Parkinson's disease detection algorithm combined EMD, BFCC, and SVM classifier 一种结合EMD、BFCC和SVM分类器的帕金森病检测算法

Diagnostyka Pub Date : 2023-10-09 DOI: 10.29354/diag/171712

Nouhaila Boualoulou, Mounia Miyara, Benayad Nsiri, Taoufiq Belhoussine Drissi

引用次数: 0

Diagnosing the thermostat using vehicle on-board diagnostic (OBD) data 使用车载诊断(OBD)数据诊断恒温器

Diagnostyka Pub Date : 2023-09-29 DOI: 10.29354/diag/173002

Kazimierz Witaszek, Mirosław Witaszek

{"title":"Diagnosing the thermostat using vehicle on-board diagnostic (OBD) data","authors":"Kazimierz Witaszek, Mirosław Witaszek","doi":"10.29354/diag/173002","DOIUrl":"https://doi.org/10.29354/diag/173002","url":null,"abstract":"The thermostat is a crucial component of a car's internal combustion engine's cooling system. Failure of the thermostat can result in undercooling or overheating of the engine. Undercooling may increase wear of engine components due to poor lubrication and lead to higher fuel consumption. Conversely, overheating can damage the engine. The engine coolant temperature is one of the fundamental parameters for the proper functioning of the engine. The vehicle's onboard diagnostics system was unable to detect the malfunction of the thermostat. As a consequence, fuel consumption increased, which was especially noticeable in winter. This paper evaluates the possibility of carrying out thermostat diagnostics using data obtained from the OBD system through a diagnostic interface ELM327, which is connected to the OBD-II connector and interfaced with Torque Pro software on a smartphone. Analysis of the data confirmed that the proposed diagnostic method was appropriate. Furthermore, the impact of the thermostat malfunction on different factors such as coolant temperature, cold engine warm-up time, parameters characterising thermostat cycling, and fuel consumption of the car were studied. It was found that, apart from the already mentioned decrease in coolant temperature, the thermostat hysteresis also decreased and the thermostat cycle time increased.","PeriodicalId":52164,"journal":{"name":"Diagnostyka","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135132831","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

Identification and evaluation of the characteristics of a selected commercial mems based vibration sensor for the machine condition monitoring 对一种用于机器状态监测的商用mems振动传感器的特性进行了识别和评价

Diagnostyka Pub Date : 2023-09-27 DOI: 10.29354/diag/172581

Damian Augustyn, Marek Fidali

引用次数: 0

Experimental study of nano-composite materials on vibration responses 纳米复合材料振动响应的实验研究

Diagnostyka Pub Date : 2023-09-22 DOI: 10.29354/diag/171710

Haidar Faisal Helal Mobark, Essam Z Fadhel, Mustafa Turki Hussein, Barhm Mohamad

引用次数: 0

Comparative study on the impact transition behaviour of PPS reinforced with 40%Vf glass 掺40%Vf玻璃增强PPS的冲击转变性能对比研究

Diagnostyka Pub Date : 2023-09-21 DOI: 10.29354/diag/171711

Maryam Jawad Abdulhasan, Rand Fadhil Kadhim, Noor Alhuda Sabah Jassim

{"title":"Comparative study on the impact transition behaviour of PPS reinforced with 40%Vf glass","authors":"Maryam Jawad Abdulhasan, Rand Fadhil Kadhim, Noor Alhuda Sabah Jassim","doi":"10.29354/diag/171711","DOIUrl":"https://doi.org/10.29354/diag/171711","url":null,"abstract":"Composite materials, in most cases polymers reinforced with fibers, are these days utilized in numerous applications such as aerospace applications in which lightweight, high strength, high specific modulus and low temperature resistance are critical issues. As these materials have possible applications in different designing areas, a lot of work has been put into enhancing their performance. This study's aim was to study the impact transition behavior of PPS and its composite under different ranges of temperatures by investigating their thermal, mechanical and structural characteristics. PPS and its composite reinforced with 40% vf (volume fraction) glass fibers are employed in this study. The impact transition behavior of PPS and 40%Vf glass fibers composite were investigated by analyzing the mechanical properties: impact, tensile, bending and, hardness at the following temperature ranges: 23°C, -26°C, and -78°C. A particular refrigerator and dry ice were used to achieve the extremely low temperatures (-26 C and -78 C, respectively). The results showed that the addition of 40% glass fibers improved the impact transition behavior of 40%GF PPS composite with temperature decreasing. Which with decreasing in temperature from 23˚C to -78˚C, the impact strength of PPS decreased by fifty five percent while it increased by twenty three percent for","PeriodicalId":52164,"journal":{"name":"Diagnostyka","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136235145","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

Influence ff the disturbance created in the measuring channel on the readings of the hot-wire anemometric sensor 测量通道中产生的扰动对热线风速传感器读数的影响

Diagnostyka Pub Date : 2023-09-20 DOI: 10.29354/diag/172535

Szymon Nitkiewicz, Ahmed Al-Jumaily

引用次数: 0

On the numerical minimisation of the objective function applied to spherical harmonics fitting 目标函数的数值最小化在球谐拟合中的应用

Diagnostyka Pub Date : 2023-09-18 DOI: 10.29354/diag/171883

Mateusz Czyrzniak, Jacek Rapinski

引用次数: 0

Optimization of fractional order PI controller using meta-heuristics algorithms applied to multilevel inverter for grid-connected PV 基于元启发式算法的分数阶PI控制器优化应用于并网光伏多电平逆变器

Diagnostyka Pub Date : 2023-09-12 DOI: 10.29354/diag/171430

Boucheritte Wafa, Mechgoug Raihane, Benguesmia Hani

{"title":"Optimization of fractional order PI controller using meta-heuristics algorithms applied to multilevel inverter for grid-connected PV","authors":"Boucheritte Wafa, Mechgoug Raihane, Benguesmia Hani","doi":"10.29354/diag/171430","DOIUrl":"https://doi.org/10.29354/diag/171430","url":null,"abstract":"Due to its multiple advantages in industrial and grid-connected applications, Multi-Level Inverters (MLIs) have increased in popularity in recent years. To improve the efficiency of a grid-connected PV system's integrated multi-level inverter fractional order PI (FOPI) controllers are used to describe the control process. The control system is made up of three control loops based on FOPI controllers: one for controlling the intermediate circuit voltage (Vdc) and the other two for controlling the direct and quadratic currents (Id, Iq) supplied by the multilevel inverter. The proposed controller parameters (K p , K I , λ ) must be selected in order to increase the efficiency of the multi-level inverter while decreasing the total harmonic distortion (THD) of the output current of the inverter as well as voltage. For this we used three meta-heuristic algorithms (PSO, ABC, GWO). The performance of the three controllers PSO-FOPI, ABC-FOPI and GWO-FOPI controller is compared. The findings showed that GWO-FOPI performs better than the other PSO-FOPI and ABC-FOPI in accuracy and total harmonic distortion THD term. The simulation will be conducted using Matlab/Simulink.","PeriodicalId":52164,"journal":{"name":"Diagnostyka","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135826343","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

ARMAX-based identification and diagnosis of vibration behavior of gas turbine bearings 基于ARMAX的燃气轮机轴承振动特性识别与诊断

Diagnostyka Pub Date : 2023-09-08 DOI: 10.29354/diag/171277

Youcef Mahroug, Belgacem Said Khaldi, M. Guemana, A. Hafaifa, Abdelhamid IRATNI, Ilhami Colak

{"title":"ARMAX-based identification and diagnosis of vibration behavior of gas turbine bearings","authors":"Youcef Mahroug, Belgacem Said Khaldi, M. Guemana, A. Hafaifa, Abdelhamid IRATNI, Ilhami Colak","doi":"10.29354/diag/171277","DOIUrl":"https://doi.org/10.29354/diag/171277","url":null,"abstract":": Parametric identification approaches play a crucial role in the control and monitoring of industrial systems. They facilitate the identification of system variables and enable the prediction of their evolution based on the input-output relationship. In this study, we employ the ARMAX approach to accurately predict the dynamic vibratory behavior of MS5002B gas turbine bearings. By utilizing real input-output data obtained from their operation, this approach effectively captures the vibration characteristics of the bearings. Additionally, the ARMAX technique serves as a valuable diagnostic tool for the bearings, enhancing the quality of identification of turbine variables. This enables continuous monitoring of the bearings and real-time prediction of their behavior. Furthermore, the ARMAX approach facilitates the detection of all potential vibration patterns that may occur in the bearings, with monitoring thresholds established by the methodology. Consequently, this enhances the availability of the bearings and reduces turbine downtime. The efficacy of the proposed ARMAX approach is demonstrated through comprehensive results obtained in this study. Robustness tests are conducted, comparing the real behavior observed through various probes with the reference model, thereby validating the approach.","PeriodicalId":52164,"journal":{"name":"Diagnostyka","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49553043","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