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4th International Conference on Electrical Machines and drives, ICEMd 2024

作者： Vahaj, Amirabbas Tahanian, Hamed R&D Department Karaj Iran Electromagnetic Design Group R&D Department Karaj Iran

ISBN: (纸本)9798331507510

This paper calculates AC losses in the stator winding of large generators. In large generators, copper loss in the stator winding consists of conventional copper loss known as dC copper loss, AC copper loss which is due to the AC current passing through the conductors and causing eddy current in the conductors, and additional loss called Circulating Current (CC) loss which caused by using parallel strands in the coil of generators to diminish eddy current loss in stator winding of large generators. The exact calculation of AC and CC loss beside dC loss is crucial for the thermal analysis of the machine because they are determinative and considerable. Hence in this paper, an analytical model is presented to calculate dC, AC and CC loss simultaneously. To feed the inputs of the presented model, Finite Element Model (FEM) is used which creates a hybrid model for finding dC, AC and CC losses. In the end presented model was validated by FEM. Then it is used to calculate the stator winding loss of a 120MW synchronous generator. © 2024 IEEE.

关键词： AC generator motors

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Strength analysis of the bushing system supporting set for a medium power turbo-generator using the multiphysics method 4

Strength analysis of the bushing system supporting set for a...

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4th International Conference on Electrical Machines and drives, ICEMd 2024

作者： rostami, Saeed Shoreshi, Peyman Nikfar, Mohsen R&D Department Karaj Iran Mechanical Design Group R&D Department Karaj Iran

ISBN: (纸本)9798331507510

In this paper, a comprehensive stress analysis of the bushing support system for a medium-power turbo-generator is presented, using the multiphysics approach. For evaluation of the system response, the finite element method (FEM) is utilized for three types of loads: electromagnetic, thermal, and mechanical. The electromagnetic and thermal loads are computed for both rated and fault conditions. In addition, mechanical loads, including bolt pre-tension, weight, and seismic acceleration are applied. All various loads are combined through a standard method, and the subsequent stress distribution is analyzed for all components based on the appropriate stress criteria. Since the bushings are used in transferring electrical currents from the stator windings to the casing outlet, allowable creepage and air electrical distances, by standard regulations, should be observed. Consequently, the support structures are required to be constructed from non-conductive materials or designed to meet the specified minimum distances. In this study, EPGM composite material is selected for the supports due to its non-conductive properties and ability to withstand the worst conditions. The structural design of supports is optimized to ensure their durability under the worst conditions. Finally, the safety factors for all components are calculated and then compared to the permissible limits. © 2024 IEEE.

关键词： Bushings

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research on Lightweight Encryption Methods for In-Vehicle Ethernet in Intelligent Automobiles 6

Research on Lightweight Encryption Methods for In-Vehicle Et...

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6th International Conference on Internet of Things, Automation and Artificial Intelligence, IoTAAI 2024

作者： dong, Bin Zhao, Xi Fan, Zhirong Cai, Yanbo Wuhan University of Technology School of Automation Hubei Wuhan China R&d Institute Dongfeng Motor Corporation Software Engineering Research Center Hubei Wuhan China R&d Institute Dongfeng Motor Corporation Department of Digitalization and Capability Assurance Hubei Wuhan China

ISBN: (纸本)9798350386974

In recent years, the trends of electrification, intelligence, connectivity, and sharing have led to increasingly complex automotive electronic and electrical systems. Against this backdrop, innovating and expanding the automotive electronic and electrical architecture has become particularly crucial. Service-Oriented Architecture (SOA), AUTOSAr standards, and in-vehicle Ethernet technology have emerged as key technologies and trends driving this development. SOME/IP (Scalable Service-Oriented Middleware over IP) is an important protocol for implementing SOA architecture, inheriting characteristics such as high speed, real-time performance, high fault tolerance, and flexibility from Ethernet. The main function of SOME/IP is to transmit messages from the sender to the receiver during communication. However, the lack of considerations for security verification, integrity, and confidentiality increases uncertainty and risks. Therefore, this paper designs and implements an Ethernet secure communication solution from the perspective of SOME/IP protocol security. This solution innovatively encrypts and decrypts service interface parameters at the application layer, enhancing the security of the in-vehicle network. © 2024 IEEE.

关键词： automotive Ethernet encryption security service interfaces SOME/IP

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Blood glucose level prediction for diabetes based on modified fuzzy time series and particle swarm optimization

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COMPUTATIONAL INTELLIGENCE 2021年第1期37卷 155-175页

作者： Nizam Ozogur, Hatice Ozogur, Gokhan Orman, Zeynep Istanbul Univ Cerrahpasa Dept Comp Engn Istanbul Turkey Arcelik AS R&D Software Design Dept Istanbul Turkey

Blood glucose control is an essential goal for the patients who have Type-1 diabetes (T1d). The prediction of the blood glucose levels for the next 30-minute is crucial. If the predicted blood glucose level is in the critical ranges, and these predictions can be known in advance, then the patients can take the necessary cautions to prevent from it. In this article, we propose a modified fuzzy particle swarm optimization algorithm for the prediction of blood glucose levels of 30-minute after the last measurement. We form the average and patient-specific models to predict the blood glucose level of the patients. Both models are tested on two different datasets which contain patients with T1d. The experimental results are evaluated in terms of root mean squared error and Clarke error grid analysis metrics. The results indicate that our proposed modified algorithm is feasible to be applied to the prediction of blood glucose levels. In addition, this approach can assist patients with T1d for their blood glucose control.

关键词： blood glucose level prediction fuzzy time series particle swarm optimization Type-1 diabetes

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A Line Complex-Based Evolutionary Algorithm for Many-Objective Optimization

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IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1150-1167页

作者： Liang Zhang Qi Kang Qi deng Luyuan Xu Qidi Wu the Department of Control Science and Engineering Tongji UniversityShanghai 201804 the Jiangsu Province Support Software Engineering R&D Center for Modern Information Technology Application in Enterprise Suzhou 215104China the Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China

In solving many-objective optimization problems(MaO Ps),existing nondominated sorting-based multi-objective evolutionary algorithms suffer from the fast loss of selection *** candidate solutions become nondominated during the evolutionary process,thus leading to the failure of producing offspring toward Pareto-optimal front with *** we find a more effective way to select nondominated solutions and resolve this issue?To answer this critical question,this work proposes to evolve solutions through line complex rather than solution points in Euclidean ***,Plücker coordinates are used to project solution points to line complex composed of position vectors and momentum *** position vectors of the solution points,momentum vectors are used to extend the comparability of nondominated solutions and enhance selection ***,a new distance function designed for high-dimensional space is proposed to replace Euclidean distance as a more effective distancebased *** on them,a novel many-objective evolutionary algorithm(MaOEA)is proposed by integrating a line complex-based environmental selection strategy into the NSGAⅢ*** proposed algorithm is compared with the state of the art on widely used benchmark problems with up to 15 *** results demonstrate its superior competitiveness in solving MaOPs.

关键词： Environmental selection line complex many-objective optimization problems(MaOPs) Plücker coordinate

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research and implementation of cooperative computing and simulation results management platform for electromagnetic transients 3

Research and implementation of cooperative computing and sim...

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3rd International Conference on Electronic Information Engineering and data Processing, EIEdP 2024

作者： Xu, dechao Zhai, Yuanyuan rao, Yufei Liu, Haiping Haidian District Beijing100192 China Henan Electric Power Research Institute Henan Zhengzhou450052 China Software R&D department of Beijing Daoheng Software Co. Ltd. Beijing100012 China

ISBN: (纸本)9781510680531

With the expansion of power system scale and the increase of complexity, electromagnetic transient simulation plays a more and more important role in power system analysis. However, traditional simulation methods face the problems of large amount of calculation and long-time consumption, which is difficult to meet the needs of rapid analysis and decision-making of modern power systems. At the same time, the working mode of many people in different places requires that the platform can realize real-time data sharing and exchange. In order to solve this problem, this paper proposes and implements a distributed platform for cooperative calculation and simulation results management of electromagnetic transients. The platform uses multi-client collaborative computing technology to achieve efficient calculation of large-scale electromagnetic transient simulation. At the same time, through the collaborative sharing and management mechanism, the cloud browsing, displaying and publishing functions of electromagnetic transient models, graphs and results for multi-users are realized, which can promote efficient communication of projects. This paper first introduces the overall architecture and key technologies of the platform, and then describes the implementation process of the platform in detail, including task division, data synchronization, collaborative computing and result management. Finally, the feasibility and superiority of the platform are verified by experiments. © 2024 SPIE.

关键词： decision making

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6th Workshop on software Engineering for Cyber-Physical Production Systems (SECPPS’24)

6th Workshop on Software Engineering for Cyber-Physical Prod...

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2024 software Engineering, SE 2024

作者： Greiner, Sandra Walter, Jörg Koren, István University of Bern Software Engineering Group BernCH-3012 Switzerland OFFIS Institute for Information Technology R&D Department Manufacturing OldenburgD-26122 Germany RWTH Aachen University AachenD-52074 Germany

ISBN: (纸本)9783885797371

software plays an increasingly important role in assuring effective and efficient operation of industrial automation engineering systems. We plan an interactive full-day workshop to discuss software engineering methods to support the maintenance of Cyber-Physical Production Systems (SECPPS’24). This workshop edition, which lines up in a series of gatherings initiated at SE’21, shall consist of paper presentations and lightning talks, with a focus on discussing the presented topics. © 2024 Gesellschaft fur Informatik (GI). All rights reserved.

关键词： Computer software maintenance

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research on Intelligent Circumvent Scheme for 5G Sub-Beam Interference

Research on Intelligent Circumvent Scheme for 5G Sub-Beam In...

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2023 IEEE Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMC+SIPI 2023

作者： Zhu, Wentao Xu, Jinpeng Wu, Yuan Zhang, Chenxi Tan, rumeng China Mobile Group Design Institute Co Ltd R&d Center of Network Design and Optimization Beijing China China Mobile Group Design Institute Co Ltd Zhejiang Branch Hangzhou China China Telecom Research Institute Green & Low-Carbon Tech. R&d Department Guangzhou China

ISBN: (纸本)9798350309768

The beam polling strategy is introduced in Nr system by 3GPP to achieve more flexible coverage, however, it may lead to SSB interference in same frequency and time slot. To solve this problem, this paper analyzes two interference optimization schemes, sub-beam separated by mod3 and sub-beam random configure scheme, and proposes an interference circumvent scheme based on user distribution and dynamic beam configuration(UddBC). The proposed scheme uses multiple ways to reducing the overlapping coverage probability and improving the accurate coverage rate. To evaluate beam level optimization scheme, a kind of sub-beam level simulation solution is also proposed. Simulation and actual network verification results show that the proposed UddBC optimization scheme has certain advantages in terms of interference reduction and coverage improvement, and it is feasible and practical to promote the actual network performance. © 2023 IEEE.

关键词： 5G mobile communication systems

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NTT WEST’s Efforts in Providing APN Services

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NTT Technical review 2023年第9期21卷 26-31页

作者： Ota, Atsushi Nishiki, Masayuki Kimura, Hideaki Matsumoto, Kenji Tanabe, Katsuhiro Yonesaka, Shinji Setsunan University Osaka Japan Osaka University Japan R&D Center NTT WEST Corporation University of Tsukuba Ibaraki Japan Value Design Department NTT WEST Corporation Kyushu Institute of Technology Fukuoka Japan Value Design Department NTT WEST Corporation Shimane University Japan

With the declared purpose of "‘Connecting’ then ‘opening’ the door to the new world," NTT WEST seeks to contribute to the further development of communities and address a variety of challenges posed by changes in society by refining its technologies and wisdom and co-create new value. The entire NTT Group has been working to actualize the Innovative Optical and Wireless Network (IOWN) concept. In this article, we introduce NTT WEST’s efforts toward this end, especially related to the development of the All-Photonics Network (APN) in creating use cases and providing the APN commercial service in the form of IOWN1.0. © 2023 Nippon Telegraph and Telephone Corp.. All rights reserved.

关键词： remote control

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Comparison of Fractional and Integral Slot Winding Configurations on the Position Error for A Conventional Wound-rotor resolver

Comparison of Fractional and Integral Slot Winding Configura...

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2023 IEEE International Magnetic Conference - Short Papers, INTErMAG Short Papers 2023

作者： Onsal, Murat demir, Yucel Aydin, Metin Mds Motor Design Ltd. R&d Department Kocaeli41275 Turkey Kocaeli University Department of Mechatronics Engineering Kocaeli41380 Turkey

ISBN: (纸本)9798350338362

resolvers are feedback elements used in the control of electric motors for many years. They are highly preferred in many parts of industry. One of the most important reasons for using resolvers is that they are more reliable than other electronic feedback elements especially in harsh environments requiring shock resistance or high vibration. At the same time, its ability to work at high temperatures makes them preferred in demanding and harsh applications. Both integral and fractional slot windings are used in resolvers. However, no detailed comparison is given for the two types of resolvers in various features including position errors. This study focuses on the design and comparison of a conventional wound-rotor resolver with both winding configurations focusing on position errors. © 2023 IEEE.

关键词： Feedback

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