Iet Science Measurement & Technology最新文献_第3页

Universal domain adaptation for machinery fault diagnosis based on multi-scale dual attention network and entropy-based clustering 基于多尺度双注意网络和基于熵的聚类的机械故障诊断通用域自适应

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-08-13 DOI: 10.1049/smt2.12213

Chun-Yao Lee, Guang-Lin Zhuo

引用次数: 0

Rotating machine bearing health prognosis using a data driven approach based on KS-density and BiLSTM

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-08-04 DOI: 10.1049/smt2.12215

Houssem Habbouche, Tarak Benkedjouh, Yassine Amirat, Mohamed Benbouzid

{"title":"Rotating machine bearing health prognosis using a data driven approach based on KS-density and BiLSTM","authors":"Houssem Habbouche, Tarak Benkedjouh, Yassine Amirat, Mohamed Benbouzid","doi":"10.1049/smt2.12215","DOIUrl":"https://doi.org/10.1049/smt2.12215","url":null,"abstract":"Rolling element bearings are vital components within rotating machinery, making them a central focus of maintenance in the prognostics and health management sector. This involves closely monitoring their condition to accurately predict the remaining useful life, increasing reliability while minimizing unexpected breakdowns, thereby enabling cost savings through planned maintenance, and enhancing operational stability and security. To achieve this goal, it is necessary to build an online intelligent system for degradation monitoring and failure prognosis by the construction of a robust health indicator and making quantitative measure for bearing degradation. In this paper, an efficient and reliable approach is proposed to estimate the remaining useful life of bearing. A new prediction method is presented by the combination of kernel smoothing density (KS-density) and bidirectional long short-term memory (BiLSTM). Firstly, KS-density smoothens the preliminarily estimated probability distribution function using machinery degradation data. Secondly, the obtained KS-density is used in feed deep learning technique based on BiLSTM models. On this basis, the variation of the signal distribution models between the current faulty state and the normal conditions state is quantified for bearing health assessment. The effective recognition of bearing degradation by the proposed Weibull-based health index is demonstrated through experimental validations utilizing run-to-failure datasets, provided by the centre for intelligent maintenance systems. The comparison with the literature's review show that the prediction results of the proposed approach are more accurate.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"19 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12215","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An improved BRISK-FREAK-based algorithm combined with LSD algorithm for complex pointer meter identification 基于 BRISK-FREAK 的改进算法与 LSD 算法相结合，用于复杂指针式仪表的识别

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-07-21 DOI: 10.1049/smt2.12204

Zhiniu Xu, Xiaonan Wu, Yuxuan Liu, Lina Zhao, Lijuan Zhao, Shipeng Song, Ruilei Cui

{"title":"An improved BRISK-FREAK-based algorithm combined with LSD algorithm for complex pointer meter identification","authors":"Zhiniu Xu, Xiaonan Wu, Yuxuan Liu, Lina Zhao, Lijuan Zhao, Shipeng Song, Ruilei Cui","doi":"10.1049/smt2.12204","DOIUrl":"10.1049/smt2.12204","url":null,"abstract":"To locate and read the complex pointer meter dial for the images with uneven illumination, blurred dial, and tilted dial, this paper firstly proposes an improved BRISK-FREAK algorithm for dial position. Then, combined with the Line Segment Detector (LSD) algorithm, an automatic identification method for complex pointer meter is proposed. The dial of a large number of SF6 complex pressure pointer meter images are located and the results reveal that the proposed improved BRISK-FREAK algorithm has good adaptability under strong interference. The computational speed of the proposed algorithm is 33% and 17% higher than the Scale-Invariant Feature Transform (SIFT) algorithm and the Binary Robust Invariant Scalable Keypoints (BRISK) algorithm respectively. The positioning success rate of the proposed algorithm is 40%, 64%, and 32% higher than that of the SIFT, Oriented FAST and Rotated BRIEF (ORB) and BRISK algorithms respectively. The reading success rate of the proposed method is 94.5%, which is 19.5%, 39.9% and 14.8% higher than that of the methods based on the ORB, SIFT and BRISK algorithms respectively. It is particularly suitable for application in the actual substations to realize the identification of complex pointer meters.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"18 9","pages":"471-480"},"PeriodicalIF":1.4,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141818188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Finite difference delay modelling for analysis of shielding effectiveness of perforated conductive enclosure 用于分析穿孔导电外壳屏蔽效果的有限差分延迟模型

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-07-14 DOI: 10.1049/smt2.12210

Ali Kalantarnia, Siavash Rajabi, Abdollah Mirzabeigi

引用次数: 0

A new method for surge arrester placement in high-voltage substations considering environmental effects 考虑环境影响的高压变电站避雷器安置新方法

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-07-09 DOI: 10.1049/smt2.12208

Faridoddin Safaei, Mohsen Niasati

{"title":"A new method for surge arrester placement in high-voltage substations considering environmental effects","authors":"Faridoddin Safaei, Mohsen Niasati","doi":"10.1049/smt2.12208","DOIUrl":"10.1049/smt2.12208","url":null,"abstract":"Conventional approaches for determining the optimal locations of surge arresters (SAs) can result in an unnecessary increase in the number of these devices in high-voltage substations. This study presents an effective technique for determining the optimal locations of SAs. The lightning back flashover (BF) and switching over-voltages are predicted with the accurate modeling of the transient behavior of all elements of high-voltage substations and transmission lines, considering the effect of environmental conditions. Also, the proposed limiting parameter Monte Carlo (MC-LP) method is utilized to correctly select the probability distribution of the possible strokes for predicting the insulation risk (IR) of a transformer based on transient over-voltage on the transformer end. Therefore, the most appropriate location to install an SA can be determined with a minimum number of calculations using the structural data of the substation, lines connected to it, and the transformer. Simulations are based on experimental results, and the number of calculations significantly decreases using the proposed algorithm. Simulations of the sample network and implementation of the proposed algorithm with MATLAB and EMTP-RV prove the efficiency of the proposed method for optimum SA placement.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"18 9","pages":"481-494"},"PeriodicalIF":1.4,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12208","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy-based PINNs for solving coupled field problems: Concepts and application to the multi-objective optimal design of an induction heater 基于能量的 PINNs 用于解决耦合场问题：感应加热器多目标优化设计的概念与应用

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-07-07 DOI: 10.1049/smt2.12212

Marco Baldan, Paolo Di Barba

{"title":"Energy-based PINNs for solving coupled field problems: Concepts and application to the multi-objective optimal design of an induction heater","authors":"Marco Baldan, Paolo Di Barba","doi":"10.1049/smt2.12212","DOIUrl":"https://doi.org/10.1049/smt2.12212","url":null,"abstract":"Physics-informed neural networks (PINNs) are neural networks (NNs) that directly encode model equations, like Partial Differential Equations (PDEs), in the network itself. While most of the PINN algorithms in the literature minimize the local residual of the governing equations, there are energy-based approaches that take a different path by minimizing the variational energy of the model. It is shown that in the case of the steady thermal equation weakly coupled to magnetic equation, the energy-based approach displays multiple advantages compared to the standard residual-based PINN: it is more computationally efficient, it requires a lower order of derivatives to compute, and it involves less hyperparameters. The analyzed benchmark problems are the single- and multi-objective optimal design of an inductor for the controlled heating of a graphite plate. The optimized device is designed by involving a multi-physics problem: a time-harmonic magnetic problem and a steady thermal problem. For the former, a deep neural network solving the direct problem is supervisedly trained on Finite Element Analysis (FEA) data. In turn, the solution of the latter relies on a hypernetwork that takes as input the inductor geometry parameters and outputs the model weights of an energy-based PINN (or ePINN). Eventually, the ePINN predicts the temperature field within the graphite plate.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"18 9","pages":"657-666"},"PeriodicalIF":1.4,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High power, broadband, coaxial to microstrip bi-directional coupler in the VHF/UHF band VHF/UHF 波段高功率、宽带、同轴至微带双向耦合器

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-07-07 DOI: 10.1049/smt2.12211

Tohid Naeimi, Arash Ahmadi

{"title":"High power, broadband, coaxial to microstrip bi-directional coupler in the VHF/UHF band","authors":"Tohid Naeimi, Arash Ahmadi","doi":"10.1049/smt2.12211","DOIUrl":"10.1049/smt2.12211","url":null,"abstract":"Broadband couplers consist usually of multiple coupled lines that are each a quarter wave-length long. Herein, in contrast to conventional methods, a short length of a microstrip line is coupled to a coaxial line. The length of the coupled microstrip line is small compared to the wavelength at the lowest operating frequency. The coupling is weak and the microstrip line is λ/8 at the highest operating frequency. The proposed structure resembles a pair of coupled lines with a linear coupling response. The coupling exhibits a slope of 6 dB/octave over multi-octave bandwidth. The microstrip line is connected to a lumped element compensating network at the coupled port. The compensating network is a low-pass circuit with a slope of −6 dB/octave. The power handling of the coupler is high due to the coaxial line and the weakly coupled microstrip line. Electromagnetic simulations and analytical formulations are presented. The broadband coupler handles nearly 1 kW of input power. Due to the weak coupling of the microstrip-coaxial coupler, the lumped element circuit needs to handle <1.5 W. A high-power coupler has been fabricated for the frequency range of 30 to 500 MHz. It exhibits a coupling response of 56 ± 0.4 dB.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"18 9","pages":"512-521"},"PeriodicalIF":1.4,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141670376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Induced voltage in piezoelectric tube driven segments and their use in nanopositioning, an assessment 压电管驱动段的感应电压及其在纳米定位中的应用评估

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-06-26 DOI: 10.1049/smt2.12209

Morteza Mohammadzaheri, Reza Tafreshi, Mohsen Bazghaleh, Steven Grainger, Mohammad Khorasani

{"title":"Induced voltage in piezoelectric tube driven segments and their use in nanopositioning, an assessment","authors":"Morteza Mohammadzaheri, Reza Tafreshi, Mohsen Bazghaleh, Steven Grainger, Mohammad Khorasani","doi":"10.1049/smt2.12209","DOIUrl":"https://doi.org/10.1049/smt2.12209","url":null,"abstract":"A piezoelectric tube actuator has a number of segments or electrodes. The induced voltage and the piezoelectric voltage, two easy-to-measure electrical signals in piezoelectric tubes, have been used in position estimation of these actuators since 2006 and 1982. However, since introduction, the induced voltage has never been compared with the piezoelectric voltage for piezoelectric tubes’ position estimation. In addition, only linear models have been used to present the relationship between the induced voltage and the position of piezoelectric tubes. In other words, in the literature, it has been practically assumed that (1) the relationship between the induced voltage and the position is linear, and (2) the induced voltage can estimate the position more accurately compared to the piezoelectric voltage. This article assesses and nullifies both these assumptions. In this research, with the use of the experimental data, both aforementioned voltage signals were mapped into the position through linear and nonlinear models. It was shown that the position can be estimated less accurately with the induced voltage compared to the piezoelectric voltage, and the relationship of the position with the induced voltage presents higher and non-negligible nonlinearity compared to the one with the piezoelectric voltage.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"18 9","pages":"495-502"},"PeriodicalIF":1.4,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12209","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the online monitoring technique for transformer oil level based on ultrasonic sensors 基于超声波传感器的变压器油位在线监测技术研究

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-06-21 DOI: 10.1049/smt2.12203

Yongcan Zhu, Kaiyang Bing, Dongyang Liu, Jiacheng He, Haonan Shi, Xinbo Huang

{"title":"Research on the online monitoring technique for transformer oil level based on ultrasonic sensors","authors":"Yongcan Zhu, Kaiyang Bing, Dongyang Liu, Jiacheng He, Haonan Shi, Xinbo Huang","doi":"10.1049/smt2.12203","DOIUrl":"https://doi.org/10.1049/smt2.12203","url":null,"abstract":"In order to solve the problem of remote oil level measurement for unmanned transformers, this paper proposes an online monitoring technology for transformer oil level based on ultrasonic sensors. Subsequently, a finite element model and experimental testing platform were constructed to analyse and verify the influencing factors of the transformer oil level sensors. The results indicated that there is a lower measurement error at 140 kHz in the ultrasonic frequency range of 20–320 kHz, which can be selected as the recommended frequency. The impurities in the oil and the thickness of the tank wall have a slight impact on the accuracy of oil level measurement, and can lead to a decrease in the signal-to-noise ratio of the echo. Furthermore, as the speed of sound increases by about 4 m/s, for every 1°C increase in oil temperature, it is necessary to calibrate the measurement results based on the oil temperature. The test results of actual experimental transformers showed that the designed online monitoring device can achieve high-precision monitoring of transformer oil level, with a relative error generally less than 3%.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":"18 7","pages":"349-360"},"PeriodicalIF":1.4,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12203","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142160257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reconstruction of rough surfaces from a single receiver at grazing angle 从单个接收器重建掠过角粗糙表面

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-06-13 DOI: 10.1049/smt2.12207

Yuxuan Chen, Mark Spivack, Orsola Rath Spivack

引用次数: 0