Iet Science Measurement & Technology最新文献_第2页

Noncontact estimation of the onset of ice accretion in turbofan stators 非接触式估算涡轮风扇定子中开始结冰的时间

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-03-26 DOI: 10.1049/smt2.12191

Khalid Saleh, John Leis, David Buttsworth

{"title":"Noncontact estimation of the onset of ice accretion in turbofan stators","authors":"Khalid Saleh, John Leis, David Buttsworth","doi":"10.1049/smt2.12191","DOIUrl":"10.1049/smt2.12191","url":null,"abstract":"The problem of crystal ice formation inside aircraft turbine engines is well-documented, and poses a significant risk to safety. The problem is not only one of power loss in flight, but the very real possibility that a flame-out event could occur due to ice accretion on compressor stators, with potentially catastrophic outcomes. Although many instrumentation systems have been developed for wing ice detection, incipient formation of crystal ice is somewhat more difficult to detect. This is compounded by the need for a noncontact sensor which is robust to in-flight conditions. This paper proposes an approach to the detection of ice formation based on microwave transmission characteristics across the first and possibly the second stage of the compressor stator. It is shown that noncontact detection is feasible under realistic conditions. The contribution of this paper is twofold. First, the microwave transmission approach is motivated using wind tunnel measurements, and appropriate frequency bands are determined. Next, a signal processing approach involving higher-order analysis of time-frequency distribution characteristics is then put forward. Experimental results are presented to support the hypothesis that multiband detection offers a workable approach to the incipient crystal-ice detection problem.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12191","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140379516","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

Predicting the coupling of HPEM waveform with a power amplifier in perforated conductive enclosure using FDDM/VF 使用 FDDM/VF 预测穿孔导电外壳中 HPEM 波形与功率放大器的耦合情况

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-03-15 DOI: 10.1049/smt2.12189

Ali Kalantarnia, Abdollah Mirzabeigi

{"title":"Predicting the coupling of HPEM waveform with a power amplifier in perforated conductive enclosure using FDDM/VF","authors":"Ali Kalantarnia, Abdollah Mirzabeigi","doi":"10.1049/smt2.12189","DOIUrl":"10.1049/smt2.12189","url":null,"abstract":"One of the most common methods to protect electronic and telecommunication systems in a high-power electromagnetic (HPEM) environment is using a conductive enclosure. Amplifiers are the vital parts in transmitter and receiver systems as the main components of a telecommunication system, so investigating the effects of HPEM waveform on their performance is very important. The Presence of apertures in the body of the conductive enclosure, as well as non-linear elements such as transistors in amplifiers, adds to the complexity of examining the coupling of electromagnetic fields on the performance of amplifiers. Considering the importance of the topic, in this study, the impact of the HPEM waveform on the power amplifier inside the conductive enclosure has been investigated. By using the finite difference delay modelling (FDDM) numerical method as a stable method followed by the vector fitting (VF) method, the electromagnetic problem has become a circuit problem, which allows examining the response of the power amplifier and any circuit, including non-linear elements against the interference field. Responses of bipolar linear and non-linear components in the perforated conductive enclosure by the proposed method have been compared with the results obtained by computer simulation technology microwave studio (CST-MWS) for verification.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239206","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

Front Cover: Equivalent transmission line characterization and multi-layer material measurement analysis of the signal conversion process in the pulsed electro-acoustic method 封面：脉冲电声法信号转换过程的等效传输线特性分析和多层材料测量分析

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-03-13 DOI: 10.1049/smt2.12188

Hanwen Ren, Siyang Zhao, Jian Mu, Haoyu Gao, Tianrun Qi, Zhiyun Han, Zhihui Li, Qingmin Li

引用次数: 0

Enhanced complex wire fault diagnosis via integration of time domain reflectometry and particle swarm optimization with least square support vector machine 通过时域反射测量和粒子群优化与最小平方支持向量机的集成，增强复杂导线故障诊断能力

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-03-07 DOI: 10.1049/smt2.12187

Abderrzak Laib, Mohamed Chelabi, Yacine Terriche, Mohammed Melit, Hamza Boudjefdjouf, Hafiz Ahmed, Zakaria Chedjara

{"title":"Enhanced complex wire fault diagnosis via integration of time domain reflectometry and particle swarm optimization with least square support vector machine","authors":"Abderrzak Laib, Mohamed Chelabi, Yacine Terriche, Mohammed Melit, Hamza Boudjefdjouf, Hafiz Ahmed, Zakaria Chedjara","doi":"10.1049/smt2.12187","DOIUrl":"https://doi.org/10.1049/smt2.12187","url":null,"abstract":"Urban power systems rely on intricate wire networks, known as the power grid, which form the essential electric infrastructure in cities. While these networks transmit electricity from power plants to consumers, they are vulnerable to faults caused by manufacturing errors and improper installation, posing risks to system integrity. Thus, accurate identification and assessment of these faults are crucial to prevent damage and maintain system reliability. The objective of this research is to present an innovative and efficient methodology for diagnosing complex wire networks through the application of time domain reflectometry (TDR) combined with the particle swarm optimization (PSO) and least squares support vector machine (LSSVM) algorithm. This research addresses the imperative need to accurately locate and assess breakage faults within wire networks, emphasizing their role in both power transmission and communication infrastructure. To model the TDR answer of a specific complex wire network, a forward model is established utilizing resistance, inductance, capacitance and conductance (RLCG) parameters and the finite difference time domain (FDTD) method. Subsequently, the PSO-LSSVM approach is used to solve the inverse problem of localizing faults in complex wire networks. The experimental results validate the practicality of this approach in real-world systems.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429289","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

A new born-approximation approach to compute the effects of motion on the solution of electromagnetic problems involving moving materials with stationary boundaries 计算运动对涉及静止边界运动材料的电磁问题求解影响的新天生近似方法

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-03-07 DOI: 10.1049/smt2.12184

Mirco Raffetto, Mario Rene Clemente Vargas, Kirill Zeyde

{"title":"A new born-approximation approach to compute the effects of motion on the solution of electromagnetic problems involving moving materials with stationary boundaries","authors":"Mirco Raffetto, Mario Rene Clemente Vargas, Kirill Zeyde","doi":"10.1049/smt2.12184","DOIUrl":"10.1049/smt2.12184","url":null,"abstract":"The non-relativistic motion of media induces very weak effects on electromagnetic fields. For this reason, it is extremely difficult to compute such effects with traditional techniques. To overcome this difficulty, a novel approach is introduced in this work. It is based on the Born approximation of the solution of electromagnetic problems involving media in motion. The formulation of these problems makes use of equivalent field sources and is specifically tailored to find the effects of motion on the electromagnetic field. The new methodology exploits traditional simulators able to deal with media at rest. The motion of the materials has to be managed by specific programs performing simple algebraic calculations. The simplest of the methods proposed does not present any additional complexity with respect to more traditional approaches to the same problems. All methods deal with time-harmonic electromagnetic fields and, for this reason, they can manage materials in motion with stationary boundaries. A complete set of simulations for cylinders moving in the axial direction show that the new methods outperform traditional numerical approaches and, in some significant cases, traditional approaches based on semi-analytical techniques. The good features of the new methodology are shown to hold true for a range of velocity values spanning 11 decades; such a range covers most of the applications of practical interest.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12184","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140259509","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

A low-cost method for testing and analyzing the cervical range of motion 测试和分析颈椎活动范围的低成本方法

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-03-04 DOI: 10.1049/smt2.12186

Xun Zhang, Guanghua Xu, Zejin Li, Zhicheng Teng, Xin Zhang, Sicong Zhang

引用次数: 0

A low-cost Raspberry Pi based time domain reflectometer for fault detection in electric fences 基于 Raspberry Pi 的低成本时域反射仪，用于电围栏故障检测

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-02-27 DOI: 10.1049/smt2.12183

Gabriel Kiarie, Ciira wa Maina, Kumbirayi Nyachionjeka

引用次数: 0

A new differential magnetic-field probe with high detection sensitivity for near-field scanning 用于近场扫描的新型高探测灵敏度差分磁场探头

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-02-27 DOI: 10.1049/smt2.12173

Duan Nie, Ruiqi Wang, Lei Wang

引用次数: 0

Evaluation method for insulation degradation of power transformer windings based on incomplete internet of things sensing data 基于不完整物联网传感数据的电力变压器绕组绝缘劣化评估方法

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-02-03 DOI: 10.1049/smt2.12174

Yuehan Qu, Hongshan Zhao, Shice Zhao, Libo Ma, Zengqiang Mi

{"title":"Evaluation method for insulation degradation of power transformer windings based on incomplete internet of things sensing data","authors":"Yuehan Qu, Hongshan Zhao, Shice Zhao, Libo Ma, Zengqiang Mi","doi":"10.1049/smt2.12174","DOIUrl":"10.1049/smt2.12174","url":null,"abstract":"This paper proposes a novel evaluation method to address the challenge of evaluating insulation degradation in power transformer windings based on incomplete online Internet of Things (IoT) sensing data. The method leverages the Wasserstein Slim Generative Adversarial Imputation Network with Gradient Penalty algorithm to fill the irregularly missing power transformer IoT perception data, including voltage, current, temperature, and partial discharge. Subsequently, electrical, thermal, and mechanical performance degradation damage indicators for transformer winding insulation are constructed using the filled and complete IoT perception data. By applying the tensor fusion algorithm, the characteristics of these degradation damage indicators are fused, leading to the development of a comprehensive degradation evaluation index for the winding insulation. The evaluation of the winding insulation degradation state is achieved through the minimum quantization error method. The proposed method is validated using the real-world transformer IoT perception data, and the experimental results demonstrate its ability to accurately assess the degree of winding insulation degradation, regardless of the presence of random or continuous irregularities in IoT sensing data.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139807932","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

Pattern clustering method of magnetic near-field radiation emissions based on DBSCAN algorithm 基于 DBSCAN 算法的磁近场辐射发射模式聚类方法

IF 1.4 4区工程技术

Iet Science Measurement & Technology Pub Date : 2024-01-31 DOI: 10.1049/smt2.12182

Bo Hou, Rui Ding, Weiheng Shao, Siyang Liu, Liwei Wang

{"title":"Pattern clustering method of magnetic near-field radiation emissions based on DBSCAN algorithm","authors":"Bo Hou, Rui Ding, Weiheng Shao, Siyang Liu, Liwei Wang","doi":"10.1049/smt2.12182","DOIUrl":"10.1049/smt2.12182","url":null,"abstract":"The analysis of magnetic near-field radiation emissions (MNRE) has recently raised more attention in device-level electromagnetic compatibility testing. Pattern clustering of MNRE for integrated circuits manually is very time-consuming because of the multi-dimensional characteristics of MNRE, such as frequency, spatial position, emission intensity, etc. This paper proposes a novel pattern clustering method of MNRE, including strong emission frequency extraction, feature extraction, and density-based clustering. Ring oscillator and five working states are designed on a Field Programmable Gate Array with 256 Ball Grid Array package, which are used to create a complex multi-source emission case for verifying the effectiveness of the clustering method. The verification results show that the proposed method can correctly cluster the multi-source emission patterns. Further, the method is also applied to a Microcontroller Unit with unknown operating states; the results show that the proposed method also can effectively distinguish the unknown emission patterns and locate the unknown interference source. The accuracy of the interference source location is proven by 3D X-ray microscope inspection.","PeriodicalId":54999,"journal":{"name":"Iet Science Measurement & Technology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/smt2.12182","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140477071","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