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An Improved Preisach Distribution Function Identification Method Considering the Reversible Magnetization

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CES Transactions on electrical Machines and Systems 2023年第4期7卷 351-357页

作者： Long Chen Lvsheng Cui Tong Ben Libing Jing College of electrical Engineering and New Energy China Three Gorges UniversityYichang443002China Hubei Provincial Engineering Technology Research Center for Power Transmission Line China Three Gorges UniversityYichang 443002China Hebei University of Technology Tianjin 300130China IEEE

This paper presents an identification method of the scalar Preisach model to consider the effect of reversible magnetization in the process of distribution function identification.By reconsidering the identification process by stripping the influence of reversible components from the measurement data,the Preisach distribution function is identified by the pure irreversible components.In this way,the simulation accuracy of both limiting hysteresis loops and the inner internal symmetrical small hysteresis loop is ensured.Furthermore,through a discrete Preisach plane with a hybrid discretization method,the irreversible magnetic flux density components are computed more efficiently through the improved Preisach model.Finally,the proposed method results are compared with the traditional method and the traditional method considering reversible magnetization and validated by the laboratory test for the B30P105 electrical steel by Epstein frame.

关键词： Magnetic material Preisach distribution function Reversible magnetization Hybrid discretization method

A Review of Nonlinear Kalman Filter Appling to Sensorless Control for AC Motor Drives

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CES Transactions on electrical Machines and Systems 2019年第4期3卷 351-362页

作者： Zhonggang Yin Fengtao Gao Yanqing Zhang Chao Du Guoyin Li Xiangdong Sun the Department of electrical Engineering Xi'an University of TechnologyXi'an710048China

Sensorless control of AC motor drives,which takes the advantages of cost saving,higher reliability,and less hardware,has been developed for several decades.Among the existing speed sensorless control methods,nonlinear Kalman filter-based one has attached widespread attention due to its superb estimation accuracy and inherent resistibility to noise.However,the determination of noise covariance matrix and robustness of model uncertainties are still open issues in practice.A great number of studies try to solve these problems in resent years.This paper reviews the application of extended Kalman filter(EKF),unscented Kalman filter(UKF),and cubature Kalman filter(CKF)in speed sensorless control for AC motor drives.As an iterative algorithm,EKF has advantages in processor implementation.However,EKF suffers from the linearization error and model uncertainties when applying to sensorless control system.This paper presents the predominant improvements of EKF which is also applicative in UKF and CKF mostly.

关键词： AC motor drive nonlinear Kalman filter robustness sensorless control.

A Novel Thermoelectric Generator for the Detection of electrical equipment

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A Novel Thermoelectric Generator for the Detection of Electr...

Wireless communications empowered by reconfigurable intelligent surfaces: Model-based vs model-free channel estimation

中国材料大会2012

作者： Hongtao Yu Zhifeng Zhang Qingquan Qiu Qiang Sun Guomin Zhang Shaotao Dai The key laboratory of Applied Superconductivity Institute of Electrical EngineeringCAS University of Chinese Academy of Sciences

ISBN: (纸本)9783037856062;3037856068

Semiconductor thermoelectric generators have a series of advantages, such as compact volume, high-level reliability, and effective power generation in the presence of temperature difference. In many occasions, as a result of high voltage, electrical equipments can’t be measured by the way of direct contact. In order to avoid equipment faults caused by low-voltage contact, a thermoelectric generator which uses waste heat of electrical equipments in service was designed. electrical equipments often operate below 400K, and in this condition Bi2Te3 shows an outstanding performance of power generation. In order to solve the problems of little temperature difference and output power on steady-state, two methods were introduced. On the one hand, the temperature difference can be increased by filling with thermal insulation padding between the p-n junctions and using a heat sink in the cold side, and on the other hand, the output voltage and power will be augmented by increasing the number of p-n junctions. These methods have been proved effectively by simulation and experiment with promising outcomes.

关键词： Thermoelectric generator electrical equipment Thermoelectric effect Output performance Power management

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Journal of Information and Intelligence

Journal of Information and intelligence 2023年第3期1卷 253-266页

作者： Li Wei Chongwen Huang George C.Alexandropoulos Ahmet M.Elbir Zhaohui Yang Zhaoyang Zhang Marco Di Renzo Merouane Debbah Chau Yuen Engineering Product Development Pillar Singapore University of Technology and DesignSingapore 487372Singapore College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China Department of Informatics and Telecommunications National and Kapodistrian University of Athens15784 AthensGreece Interdisciplinary Centre for Security Reliability and TrustUniversity of LuxembourgL-4365 Esch-sur-AlzetteLuxembourgand Duzce UniversityDuzce 81620Turkey Universite Paris-Saclay CNRSCentraleSupelecLaboratoire des Signaux et Systemes91192France Khalifa University of Science and Technology Abu DhabiUnited Arab Emirates School of electrical and Electronics Engineering Nanyang Technological UniversitySingapore 639798Singapore

Reconfigurable intelligent surfaces(RISs)are lately being attractive for their great potential in future sixth generation wireless communications(6G),which is attributed to their affordable energy consumption and easy integration.However,the large numbers of low-cost reflecting elements comprising RISs impose challenges for channel acquisition in various RIS-based wireless applications,such as RIS-enhanced orthogonal frequency-division multiplexing and multi-user multipleinput multiple-output systems.In this article,we first overview the state-of-the-art RIS hardware architectures designed to assist channel estimation for RIS-empowered wireless communication systems.We also overview existing channel estimation approaches,which are categorized into model-based and model-free techniques,and discuss their advantages and limitations depending on the RIS deployment.Design challenges with RIS-empowered systems in terms of hardware and other parameter limitations are presented,together with future research directions for channel estimation in RIS-based wireless systems,such as RISs with extremely large numbers of elements,multi-hop communications with RISs,and frequency division duplexing for high mobility systems.

关键词： Reconfigurable intelligent surfaces Channel estimation Model-based methods Model-free methods

A Smartphone-Based Networked Control Platform: Design and Implementation

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A Smartphone-Based Networked Control Platform: Design and Im...

MoTransFrame:Model Transfer Framework for CNNs on Low-Resource Edge Computing Node

第三十九届中国控制会议

作者： Dong-Liang Chen Guo-Ping Liu College of Mechanical and Electronic Engineering Dalian Minzu University Center for Control Theory and Guidance Technology Harbin Institute of Technology key laboratory of Intelligent Perception and Advanced Control of state Ethnic Affairs Commission Department of Artificial intelligence and Automation Wuhan University

The rapid development of embedded systems and IT makes electrical devices functional and tiny. This progress is especially reflected in the smartphone industry. In this paper, a novel applicable wireless control platform based on smartphones is proposed. The system is of high value due to the advantages of smartphones such as mobility, resourcefulness, tiny and etc.Mechanisms are designed in this paper to guarantee the real-timeness of the controller. To ease the controller implementation,code auto-generation technique is integrated to the platform, which is able to convert Simulink block diagrams to executable files for Android smartphones. In addition, protocols are designed to transfer data to remote workstations such that the control system can be supervised and monitored on-line. At last, the control platform is tested on a spacecraft simulator. The experimental results validate the effectiveness and reliability of the designed platform.

关键词： Networked Control Platform Smartphones Real Time Control

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Computers, Materials & Continua 2020年第12期65卷 2321-2334页

作者： Panyu Liu Huilin Ren Xiaojun Shi Yangyang Li Zhiping Cai Fang Liu Huacheng Zeng National University of Defense Technology Changsha410073China Training and Administration Department the Central Military CommissionBeijing100851China Department of Science and Technology China Electronics Technology Group CorporationBeijing100846China National Engineering laboratory for Public Safety Risk Perception and Control by Big Data Beijing100041China School of Design Hunan UniversityChangsha410082China Department of electrical and Computer Engineering University of LouisvilleLouisvilleKY 40292USA

Deep learning technology has been widely used in computer vision,speech recognition,natural language processing,and other related fields.The deep learning algorithm has high precision and high reliability.However,the lack of resources in the edge terminal equipment makes it difficult to run deep learning algorithms that require more memory and computing power.In this paper,we propose MoTransFrame,a general model processing framework for deep learning models.Instead of designing a model compression algorithm with a high compression ratio,MoTransFrame can transplant popular convolutional neural networks models to resources-starved edge devices promptly and accurately.By the integration method,Deep learning models can be converted into portable projects for Arduino,a typical edge device with limited resources.Our experiments show that MoTransFrame has good adaptability in edge devices with limited memories.It is more flexible than other model transplantation methods.It can keep a small loss of model accuracy when the number of parameters is compressed by tens of times.At the same time,the computational resources needed in the reasoning process are less than what the edge node could handle.

关键词： Edge computing convolutional neural network model transformation model compression

Transformer’s Condition Assessment Method Based on Combination of Cloud Matter Element and Principal Component Analysis

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Energy and Power Engineering 2017年第4期9卷 659-666页

作者： Qianli Hong Jiantao Zhang Qing Xie Shaodong Liang Yuqin Xu Si Li Weitao Hu Department of electrical Engineering North China Electric Power University Baoding Hebei China Beijing Electric Power Corporation Beijing China state Grid Hebei Maintenance Branch Shijiazhuang China

With the development of power grid, as one of the key equipment, the transformer’s condition assessment method has always receive attention from experts, scholars concern more and more about the method’s practicality and reliability. In the traditional condition assessment method, due to the characteristics of the transformer’s complex structure, the assessment system is not comprehensive enough, or the assessment system is too complex, the indexes are not easy to quantify, such problems are emerging. The traditional method is complex and the degree of quantification is not enough. Therefore it is necessary to propose a condition assessment method that is easy to carry out the condition assessment work and does not affect the assessment results. In this paper, we propose a method to assess the state of the transformer’s complex structure. First, we establish a comprehensive assessment system, then apply the method of principal component analysis to optimize the index system, and then use the theory of cloud-matter-element. Finally the reliability and rationality of the method are verified by an example.

关键词： Transformer Assessment Method Principle Component Analysis Cloud Model

Properties of intermediate-frequency vacuum arc in sinusoidal curved contact and butt contact

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Plasma Science and Technology 2020年第2期22卷 29-37页

作者：佟子昂武建文金巍陈均 School of Automation Science and electrical Engineering Beihang UniversityBeijing 100191People's Republic of China Guizhou Tianyi electrical Co. Ltd.Zunyi 563002People's Republic of China

In this report,two new contact structures of a vacuum interrupter with a sinusoidal curved surface are proposed to improve the capability by increasing the surface area.The experimental investigation of vacuum arc at intermediate frequency(360-800 Hz)was conducted and the results were compared with a butt contact with the same contact diameter(41 mm)and the same material.By analyzing the arc behavior,arc voltage characteristics,arc energy,current interrupting capacity,ablation of the anode contact and condensation of the arc products at a 3 mm gap,the differences in their vacuum arc characteristics were determined.The correlations of their arc energy with the amplitude and the frequency of the current were also achieved.Analysis suggests that the ruled curved contact has strong application potentiality because of its low arc energy,low arc voltage noise and arc voltage peak,light ablation on the surface of the anode contact and high interrupting capacity.

关键词： sinusoidal curved surface intermediate frequency voltage characteristics arc energy vacuum arc properties arc behavior

Architecture and challenges for low-altitude security system

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Architecture and challenges for low-altitude security system