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International Conference on Electrical Machines and Systems (ICEMS)

作者： Xiaokun Zhao Cheng Zhang Weinan Wang Baoquan Kou Liangkuan Zhu College of Computer and Control Engineering Northeast Forestry University Harbin China Department of Electrical and Automation Harbin Institute of Technology Harbin China

Permanent magnet synchronous motors (PMSMs) offer the benefits of high torque density and a superior power factor. Nevertheless, the challenge lies in the inherent difficulty of adjusting the permanent magnet flux. To address this issue, this paper analyzes the influence of electromagnetic parameters on the constant-power speed range (CPSR). First, the analysis focuses on the influence of d-axis inductance and saliency ratio, aiming to establish a design method for achieving a wide CPSP in PMSMs. Second, based on the electromagnetic parameter requirements, a reverse-salient PMSM is proposed and its working principle is explained. Finally, the electromagnetic characteristics, including torque and the CPSP, are determined through the application of the finite element method (FEM). The obtained results confirm that the reverse-salient PMSM achieves a CPSP of 7:1, thus validating the accuracy of the theoretical analysis.

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Synchronization Stability of Grid-Tied VSC With control Limiters: Models, Solutions, and Boundaries

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IEEE Transactions on Energy Conversion 2024年

作者： Wu, Tianhao Jiang, Qirong Liu, Feng Huang, Meng Xie, Xiaorong State Grid Corporation of China National Power Dispatch and Control Center Beijing100031 China Tsinghua University State Key Laboratory of Power System Department of Electrical Engineering Beijing100084 China Wuhan University School of Electrical Engineering and Automation Wuhan430072 China

Existing studies on large-signal synchronization stability of the grid-following voltage-source converters (VSCs) have been focused on the phase-locked loop (PLL). Saturation nonlinearities introduced by current or voltage limiters, which can emerge during large disturbances, could greatly complicate the instability mechanism of PLL-synchronized converters. However, limited attention has been paid to such saturation-induced instability issues in prior work. This paper investigates the large-signal synchronization stability of grid-tied VSCs with full consideration to two typical kinds of saturation nonlinearities in the VSC's control system: the current hard limiter and the voltage circular limiter. The conditions under which the VSC may enter a saturated state are revealed. The impacts of hard and circular limiters on the system transient dynamics are analyzed separately. A unified differential equation (UDE) model that combines both kinds of limiters is proposed for quantitative analysis of synchronization stability. Subsequently, the averaging-theory-based analysis approximately solves the UDE model and provides the analytical large-signal stability boundaries of the system. The impacts of various factors, including operating conditions, PLL parameters, limiter thresholds, and active/reactive current control strategies, on the synchronization stability are investigated based on the proposed model. The effectiveness of theoretical analyses is validated via time-domain simulation and control hardware-in-the-loop tests. © 1986-2012 IEEE.

关键词： Phase locked loops

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Principles of Safety Signalling and Traffic control Systems Synthesis on Railways

Principles of Safety Signalling and Traffic Control Systems ...

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2023 International Conference on Industrial engineering, Applications and Manufacturing, ICIEAM 2023

作者： Efanov, Dmitrii V. Khoroshev, Valerii V. Osadchy, German V. Materials and Transport Peter the Great St. Petersburg Polytechnic University Higher School of Transport Institute of Mechanical Engineering St. Petersburg Russia The Russian University of Transport Department of Automation Remote Control and Communication on Railway Transport Moscow Russia Russian University of Transport Miit Department of Automation Remote Control and Communication on Railway Transport Moscow Russia Integrated Monitoring Systems Llc Deputy General Director - Chief Engineer of Scientific and Technical Center St. Petersburg Russia

ISBN: (纸本)9781665475952

The paper authors analyze the safety control systems synthesis problem for critical technological processes on the railway signalling and automation systems. It is shown that modern control systems for complex distributed systems, such as a railway transport system, are not implemented with absolute safety. Such systems safety is limited by considering only their own failures, control systems and their components external failures, as well as infrastructure objects failures that directly interact with control devices. Other infrastructure facilities are not considered in any way during automatic control and data transfer to on-board automation. We presents the theoretical principles for the safety train traffic control system synthesis, considering the capabilities of equipping infrastructure facilities with highly reliable and safe means of technical diagnostics and monitoring. A simplified structure of the central train traffic control complex is given, considering the diagnosing and monitoring results of all transportation process components. The conditions for the completely safety train traffic control systems synthesis are formulated. The tasks going with the safe control system synthesis problem are noted. The railway infrastructure facilities and rolling stock parameters comprehensive accounting will allow reaching a qualitatively higher level of train traffic safety. © 2023 IEEE.

关键词： Remote control

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A SINS Error Correction Approach Based on Dual-Threshold ZV Detection and Cubature Kalman Filter

A SINS Error Correction Approach Based on Dual-Threshold ZV ...

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2023 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2023

作者： Xu, Ruijie Chen, Shichao Sun, Wenqiao Lv, Yisheng Luo, Jialiang Tang, Ying Institute of Automation Chinese Academy of Sciences College of Information Science & Technology Beijing University of Chemical Technology The State Key Laboratory for Management and Control of Complex System State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Institute of Automation Chinese Academy of Sciences The Center of National Railway Intelligent Transportation System Engineering and Technology China Academy of Railway Sciences Corporation Limited The State Key Laboratory for Management and Control of Complex System State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Transportation and Economics Research Institute The Center of National Railway Intelligent Transportation System Engineering and Technology China Academy of Railway Sciences Corporation Limited Beijing China Institute of Automation Chinese Academy of Sciences The State Key Laboratory for Management and Control of Complex System State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Institute of Automation Chinese Academy of Sciences China University of Geosciences Beijing School of Information Engineering The State Key Laboratory for Management and Control of Complex System State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Rowan University Department of Electrical and Computer Engineering Glassboro United States

ISBN: (纸本)9798350337020

Global Navigation Satellite Systems (GNSS) can provide real-time positioning information for outdoor users, but cannot for indoor scenarios or heavily occluded outdoor scenarios. Strap-down Inertial Navigation System (SINS) are widely used to locate people in complex interior or heavily occluded outdoor scenarios due to its light weight and low power consumption. However, IMU of SINS are noisy, and the sampling data error is large, which is a divergence of the error with time. Therefore, it will generate a positioning accumulation error, which affects the final positioning accuracy. The problem of cumulative IMU errors is usually dealt with by Zero-Velocity Update (ZUPT). The zero-velocity detection part of basic ZUPT method usually uses a single threshold to determine the gait of pedestrian, which often has the problem of gait misjudgment and omission. To address these problems, this paper proposes a composite conditional detection method to solve the problem of misjudgment in the zero-velocity interval. In addition, we redesign the zero-velocity update algorithm and uses the Cubature Kalman filter (CKF) for pedestrian positioning error correction. The experimental results demonstrate that the proposed ZUPT method based on dual-threshold detection can better detect the interval between pedestrian motion and stationery than ones with single threshold. The zero-velocity update algorithm based on CKF has higher performance than conventional EKF and UKF methods, which constrains the cumulative error of SINS to about 0.2% of the whole walking distance. © 2023 IEEE.

关键词： Cubature Kalman Filter Inertial Pedestrian Navigation Zero-Velocity Update

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An Improved Recurrent Neural Network for Industrial control System Identification

An Improved Recurrent Neural Network for Industrial Control ...

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2022 International Conference on Electrical, control and Information Technology, ECITech 2022

作者： Sun, Yu Qiu, Shirong Tian, Bin Ji, Lianen Beijing Engineering Research Center of Power Station Automation CHN Energy Zhishen Control Technology Co. Ltd Beijing China Department of Computer Science and Technology China University of Petroleum Beijing China

ISBN: (纸本)9783800759170

The rapid development of industrial automation makes the control process more and more demanding for the accuracy of system identification. Finding an effective identification model for regulating and controlling the time-critical and nonlinear process remains a difficult problem. Therefore, this paper proposes an improved recurrent neural network for industrial control system identification, called SI-RNNs, to solve the problem of insufficient prediction accuracy of the traditional RNNs in the initial time steps. SI-RNNs adds the state initialization process to determine the initial operational state of the control systems and selects the optimal state initialization steps length by perturbating feature values approach. In practical cases, it is verified that our method can effectively improve the solution accuracy of the model for industrial control process, especially in the gated recurrent neural networks capable of long-term memory. © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

关键词： Recurrent neural networks

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Raman microscopic measurement of materials used on banknotes 26

Raman microscopic measurement of materials used on banknotes

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26th International Conference on Circuits, Systems, Communications and Computers, CSCC 2022

作者： Tomaskova, Hana Vasek, Vladimir Department of Electronic and Measurements Faculty of Applied Informatics Tomas Bata University in Zlin Zlín Czech Republic Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlin Zlín Czech Republic

ISBN: (纸本)9781665481861

The successful verification of the authenticity of banknotes, or the detection of counterfeits, is based on the combination of an effective measuring system and computer technology. In this paper, a modern diagnostic method Raman microscopy together with an exploratory tool for processing and interpreting multi-dimensional datasets, and cluster analysis, are used to study structural differences between paper and orange ink used on genuine banknotes. Six currencies of European countries were selected for this study: Croatian kuna, Czech crown, euro, Great British Pound, Polish zloty, and Swiss franc. Raman microscopy offers non-destructive, rapid analysis without any sample preparation and pre-processing, with the potential to recognize structural modification of substances, together with the advantages of optical microscopy. Cotton fibres, TiO2 in two different modifications, and other additives are successfully identified within the spectra. The patterns found in mathematically processed Raman data, especially between the paper, indicate both, the similarities and differences across the various banknotes, even of the same currency. The results serve as a base of the spectral database for authenticity control of banknotes and classification of the materials used. © 2022 IEEE.

关键词： Cluster analysis

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The applied principles of EEG analysis methods in neuroscience and clinical neurology

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Military Medical Research 2024年第6期11卷 907-941页

作者： Hao Zhang Qing-Qi Zhou He Chen Xiao-Qing Hu Wei-Guang Li Yang Bai Jun-Xia Han Yao Wang Zhen-Hu Liang Dan Chen Feng-Yu Cong Jia-Qing Yan Xiao-Li Li School of Systems Science Beijing Normal UniversityBeijing 100875China College of Electrical and Control Engineering North China University of TechnologyBeijing 100041China School of Automation Science and Engineering South China University of TechnologyGuangzhou 510641China Department of Psychology the State Key Laboratory of Brain and Cognitive Sciencesthe University of Hong KongHong Kong SAR 999077China HKU-Shenzhen Institute of Research and Innovation Shenzhen 518057GuangdongChina Department of Health Technology and Informatics the Hong Kong Polytechnic UniversityHong Kong SAR 999077China Department of Rehabilitation Medicine the First Afliated Hospital of Nanchang UniversityNanchang 330006China Rehabilitation Medicine Clinical Research Center of Jiangxi Province Nanchang 330006China Beijing Key Laboratory of Learning and Cognition School of PsychologyCapital Normal UniversityBeijing 100048China School of Communication Science Beijing Language and Culture UniversityBeijing 100083China Institute of Electrical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina School of Computer Science Wuhan UniversityWuhan 430072China School of Biomedical Engineering Faculty of Electronic Information and Electrical EngineeringDalian University of TechnologyDalian 116081LiaoningChina Guangdong Artifcial Intelligence and Digital Economy Laboratory(Guangzhou) Guangzhou 510335China.

Electroencephalography(EEG)is a non-invasive measurement method for brain *** to its safety,high resolution,and hypersensitivity to dynamic changes in brain neural signals,EEG has aroused much interest in scientific research and medical *** article reviews the types of EEG signals,multiple EEG signal analysis methods,and the application of relevant methods in the neuroscience feld and for diagnosing neurological ***,3 types of EEG signals,including time-invariant EEG,accurate event-related EEG,and random event-related EEG,are ***,5 main directions for the methods of EEG analysis,including power spectrum analysis,time-frequency analysis,connectivity analysis,source localization methods,and machine learning methods,are described in the main section,along with diferent sub-methods and effect evaluations for solving the same ***,the application scenarios of different EEG analysis methods are emphasized,and the advantages and disadvantages of similar methods are *** article is expected to assist researchers in selecting suitable EEG analysis methods based on their research objectives,provide references for subsequent research,and summarize current issues and prospects for the future.

关键词： Electroencephalogram analysis methods Applied principles Neuroscience Diagnosis Neurological diseases

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Assessment of Atmospheric Radiation Effects on Aircraft Safety Analysis

Assessment of Atmospheric Radiation Effects on Aircraft Safe...

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International Conference on Recent Advances in Space Technologies (RAST)

作者： Ayçin Gürdamar Şeref Naci Engin Department of Avionics Engineering Graduate School of Science and Engineering Yıldız Technical University Istanbul Türkiye Department of Control and Automation Engineering Electrical and Electronics Faculty Yıldız Technical University Istanbul Türkiye

This paper discusses the importance of safety engineering in the identification, mitigation, and elimination of hazards to achieve an acceptable level of risk for a product or system throughout its life cycle. Safety analysis is essential to airworthiness regulations and is required for the certification of a product, ensuring compliance with the related type certificate release and hence safety requirements. It involves evaluating functional hazard scenarios for each system function and classifying them in terms of severity. It focuses on the occurrence frequency of critical systematic and random failure conditions. This is achieved through fault tree analysis of combinations of failure conditions. The paper presents a generic study on atmospheric radiation effects on aircraft and methods for analytical calculation of system reliability characteristics using qualitative and quantitative analyses on susceptible parts and qualitative analysis at system and aircraft levels. The outcome of the study is the achievement of a sufficient confidence level of see for aircraft altitudes up to 35000ft with both calculation and observation results. Avionics operating at altitudes between 35000-60,000 feet constitute a risk factor and should be analysed case by case.

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Spacecraft formation-containment flying control with time-varying translational velocity

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Chinese Journal of Aeronautics 2020年第1期33卷 271-281页

作者： Liangming CHEN Chuanjiang LI Yanning GUO Guangfu MA Baolong ZHU Department of Control Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Electrical Engineering and Automation Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

This paper investigates the problem of Spacecraft Formation-Containment Flying control(SFCFC)when the desired translational velocity is *** SFCFC problem,there are multiple leader spacecraft and multiple follower spacecraft and SFCFC can be divided into leader spacecraft’s formation control and follower spacecraft’s containment ***,under the condition that only a part of leader spacecraft can have access to the desired time-varying translational velocity,a velocity estimator is designed for each leader ***,based on the estimated translational velocity,a distributed formation control algorithm is designed for leader spacecraft to achieve the desired formation and move with the desired translational velocity ***,to ensure all follower spacecraft converge to the convex hull formed by the leader spacecraft,a distributed containment control algorithm is designed for follower ***,to reduce the dependence of the designed control algorithms on the graph information and increase system robustness,the control gains are changing adaptively and the parametric uncertainties are handled,***,simulation results are provided to illustrate the effectiveness of the theoretical results.

关键词： Adaptive gain technique Distributed control Formation-containment Formation control Spacecraft formation flying

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A System for Pressure controlling the Common Steam Line of CHP 4

A System for Pressure Controlling the Common Steam Line of C...

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4th International Conference on control Systems, Mathematical Modeling, automation and Energy Efficiency, SUMMA 2022

作者： Eremin, Eugenie L. Nikiforova, Larisa V. Telichenko, Denis A. Shelenok, Evgeniy A. Amur State University Information and Control Systems Department Blagoveshchensk Russia Corporation Dgk Blagoveshchensk Cogeneration Station Amur Generation Branch of Public Blagoveshchensk Russia Pacific National University Automation and System Engineering Department Khabarovsk Russia

ISBN: (数字)9781665456593

ISBN: (纸本)9781665456593

The paper solves the problem of building a control system for steam pressure at a Combined Heat and Power Plant (CHP). Functioning of the regulator in terms of practical implementation is analyzed. The main features of the technological process which affect the effective management of the automation object are identified. It is considered complex coal-fired CHP plants with common steam line and drum boiler in a combined cycle of generating electricity and heat which provides a common primary frequency control in the power system. Authors was obtained the mathematical model of the plant for one of the boiler units of the Blagoveshchensk CHP. Data processing was carried out by authors with the help of the method of passive experiment. Analysis of the system operation was shown that the control plant can be described with a sufficient degree of accuracy by a parametrically undefined model with changing structure and delay. Various Matlab simulation sessions demonstrate the good quality of the proposed solutions when changing both the parameters and structure of the system. © 2022 IEEE.

关键词： Steam piping systems

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