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3rd IEEE International Conference on Software engineering and Artificial Intelligence, SEAI 2023

作者： Zhao, Li Duan, Gonghao Wuhan Institute of Technology School of Computer Science and Engineering Wuhan China Automation for Complex Systems Hubei Key Laboratory of Advanced Control and Intelligent Wuhan China

ISBN: (纸本)9798350337952

The evaluation of regional geological hazard susceptibility is of great significance to the prevention and control of geological hazard. In this paper, the "4-20"Lushan earthquake disaster area as the research area, combined with GIS and characteristics of the research area, through correlation analysis, selected 9 influencing factors as the evaluation factors. The study was conducted using a weighted information volume-logistic regression model (WI-LR). The results were classified into five sensitivity levels: very low, low, medium, high and very high. The results show that the landslide prone areas in Lushan County are concentrated in the area below the middle of the county seat, mostly near rivers, faults and areas with peak acceleration greater than 0.4. Among them, WI-LR model (AUC=0.918) > deterministic factor model (CF =0.908) > weighted information quantity model (WI) (AUC=0.896) > information quantity model I (AUC=0.853) > information quantity logistic regression model I-LR (AUC=0.799). It indicates that WI-LR model has high evaluation accuracy. © 2023 IEEE.

关键词： Hazards

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Critical Node Identification of Cyber-Physical Power Systems Based on Improved Fuzzy Analytic Hierarchy Process 41

Critical Node Identification of Cyber-Physical Power Systems...

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第41届中国控制会议

作者： Jian Li Yiqiang Li Qingyu Su School of Automation Engineering Northeast Electric Power University Jilin Provincial Key Laboratory of Advanced Control Technology of Smart Energy

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Aiming at the present information security problems and the one-sidedness of vulnerability assessment indicators of cyber-physical power systems,an assessment model is proposed based on the improved fuzzy analytic hierarchy process to identify the critical nodes of the ***,an integrated model of the cyber-physical power system is established,and the cascading failure process after component failure of the power system is taken into ***,several assessment indicators considering two aspects of power flow character and structural safety are given.A three-scale method and the optimal transfer matrix are employed to improve the traditional analytic hierarchy process,and the fuzzy comprehensive evaluation is used to determine the final ***,the validity of the proposed method is verified on the model based on the IEEE 30-bus system.

关键词： cyber-physical power systems critical node identification improved fuzzy analytic hierarchy process cascading failure

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Simulition Study on Fatigue Life of Offshore Floating Photovoltaic DC Cable Across Floating Blocks

Simulition Study on Fatigue Life of Offshore Floating Photov...

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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Du, Xuehui Wang, Chunjie Chen, Peng Fu, Qiang School of Electrical Engineering and Automation Tianjin University of Technology Tianjin300384 China Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin University of Technology Tianjin300384 China

ISBN: (纸本)9789819618675

In order to solve the fatigue problem of offshore floating photovoltaic direct current(DC) cable between floating blocks under the influence of wave motion, this paper proposes a method to evaluate the fatigue life of DC cable. On the basis of analyzing the fatigue damage mechanism of the DC cable, usingthe service life of the DC cable is accurately predicted by using the stress prediction method with the COMSOL finite element simulation software. By simulating stress conditions under different working conditions, the results show that: The fatigue life of DC cable across floating blocks is negatively correlated with the maximum equivalent stress, and the life decreases with the increase of displacement degree. The dangerous point of cable fatigue is near the fixed point at both ends of the cable. At the same time, the influence of different suspension lengths on the cable fatigue life is analyzed by simulation. The simulation results provide a useful design reference for optimizing cable layout and improving its service life. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Fatigue damage

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Distributed bearing-based formation control of unmanned aerial vehicle swarm via global orientation estimation

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Chinese Journal of Aeronautics 2022年第1期35卷 44-58页

作者： Yuwei ZHANG Xingjian WANG Shaoping WANG Xinyu TIAN A School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Science and Technology on Aircraft Control Laboratory Beihang UniversityBeijing 100191China Ningbo Institute of Technology Beihang UniversityNingbo 315800China

Most existing formation control approaches for Unmanned Aerial Vehicle(UAV)swarm assume that global position and global coordinate frame are directly available for each *** extend the application domain,this paper proposes a distributed bearing-based formation control scheme,without any reliance on global position or global coordinate *** interactions among UAVs are described by a directed topology with two-leader *** address the issue of unavailable global coordinate frame,we first present a distributed orientation estimation law for each UAV to determine its orientation under the coordinate frame of the first *** on the orientation estimation,we then design a bearing-based formation control law to globally asymptotically track target moving ***,simulation results are provided to validate the proposed method,which show that the translation,scale and orientation of the formation can be flexibly controlled via two leaders.

关键词： Bearing measurement Formation control Global orientation estimation Two-leader structure Unmanned aerial vehicles

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含外圈剥落和不对中的齿轮-转子-轴承系统振动分析

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Journal of Central South University 2024年第2期31卷 511-525页

作者：徐宏阳赵翔马辉罗忠韩清凯闻邦椿 School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion System(Ministry of Education) Northeastern UniversityShenyang 110819China

轴承套圈的不对中和剥落是影响齿轮-转子-轴承系统振动特性的典型误差和故障。为了研究外圈不对中和剥落对系统的耦合影响,有必要对含不对中和剥落的齿轮-转子-轴承系统振动特性进行分析。首先,考虑外圈不对中和剥落,计算了轴承的五自... 详细信息

轴承套圈的不对中和剥落是影响齿轮-转子-轴承系统振动特性的典型误差和故障。为了研究外圈不对中和剥落对系统的耦合影响,有必要对含不对中和剥落的齿轮-转子-轴承系统振动特性进行分析。首先,考虑外圈不对中和剥落,计算了轴承的五自由度非线性恢复力。然后,基于轮齿承载接触分析(LTCA)方法,计算了啮合刚度并且建立了直齿轮副的动力学模型。在此基础上,基于切片法建立了花键的等效刚度模型。最后,通过将轴承的恢复力模型、直齿轮副的动力学模型和花键的等效刚度模型与转子系统的有限元模型耦合,建立了齿轮-转子-轴承系统的动力学模型。分析表明,只有剥落位于承载区时,才会对轴承接触力、接触角和系统振动特性产生影响。外圈的不对中导致轴承的承载区范围增大,并使得剥落对系统产生影响的概率增加。

关键词：球轴承不对中剥落振动特性齿轮-转子-轴承系统

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Fuzzy-Model-Based Fault-Tolerant control for Stochastic Re-Entrant Manufacturing Systems

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3542-3556页

作者： Zhang, Kexin Gao, Qing Ding, Steven X. Lu, Jinhu Qiu, Jianbin Guo, Yige Beihang University School of Cyber Science and Technology Beijing100191 China Beihang University School of Automation Science and Electrical Engineering Beijing100191 China Hangzhou Innovation Institute Beihang University Hangzhou310051 China Zhongguancun Laboratory Beijing100095 China Institute for Automatic Control and Complex Systems University of Duisburg-Essen Duisburg47057 Germany Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin150001 China Zhongguancun Laboratory Beijing China

This study addresses the problem of guaranteed cost fault-tolerant fuzzy control for multiline re-entrant manufacturing systems (RMSs) against stochastic disturbances and workstation faults. Initially, a nonlinear hyperbolic impulsive partial differential equation model is employed to describe the complex and hybrid dynamics of RMSs suffering from unexpected faults within the working stations, and then the corresponding approximation T-S fuzzy model is constructed. In what follows, with the aid of the parallel distributed compensation fuzzy control scheme, the main results of stability analysis and controller synthesis for the closed-loop re-entrant manufacturing control system are derived using a timer-dependent Lyapunov functional with spatio-temporal auxiliary variables. It is found that by means of the proposed fault-tolerant control approach, the RMS can be effectively and robustly driven to a desired production mode with steady feeding and production rates while the upper bound of a quadratic cost function is minimized. Finally, the effectiveness of the proposed control approach is validated through numerical simulations. © 2013 IEEE.

关键词： Fuzzy control

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Research on Sign Language Gesture Division and Gesture Extraction in Complex Background

Research on Sign Language Gesture Division and Gesture Extra...

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2022 International Conference on Computer Vision, Application, and Algorithm, CVAA 2022

作者： Tian, Yifan Han, Fangfang Zhu, Minfeng Xu, Xiaoliang Li, Yadong School of Electrical Engineering and Automation China Tianjin University of Technology Tianjin300384 China Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems China

ISBN: (纸本)9781510664036

Sign language plays an important role in information transmission and emotional communication between deaf-mute people and the outside world. With the development of artificial intelligence technology, the recognition, translation and generation of sign language based on digital image processing have attracted worldwide attention. In the field of sign language recognition, effective hand division and gesture extraction are the first and key steps, which directly affect the accuracy of sign language recognition. In this paper, a hand information extraction method based on depth image processing is proposed to solve the problem of sign language gesture extraction in complex background. For sign language speakers,hands are at the front of their bodies, so the depth images of sign language speakers can be collected by depth camera, and the complex background can be removed and hand information can be extracted by segmenting different color objects in the depth images. In this paper, the D435i camera of Inter is used to capture the depth image of the sign language speaker, and the HSV color space model based on the digital image is used for threshold processing of the fusion of hue components and brightness components to achieve the division of the hand position;through median filtering and mathematical morphology of digital image, division noise is removed and interference is reduced. Through skeleton extraction algorithm, the gesture gesture can be obtained. Experiments show that the proposed acquisition scheme and algorithm flow in this paper can effectively realize hand position division and gesture extraction in complex background conditions, and provide a good foundation for subsequent gesture recognition and expression. © 2023 SPIE.

关键词： Morphology

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Measurement Method of High-Frequency Winding Loss in Gapped Inductors Based on Magnetic Field Equivalence

CPSS Transactions on Power Electronics and Applications

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CPSS Transactions on Power Electronics and Applications 2024年第4期9卷 395-404页

作者： Zhiyong Qiu Kaining Fu Wei Chen School of Electrical Engineering and Automation Xiamen University of Technology Xiamen China Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control School of Electrical Engineering and Automation Xiamen University of Technology Xiamen China College of Electrical Engineering and Automation Fuzhou University Fuzhou China

High-permeability cores, such as ferrite, can increase power transfer efficiency and are often designed to be gapped to mitigate magnetic saturation. The fringing effect caused by the air-gap increases the winding loss of the gapped inductor. The key to accurately evaluating its winding loss is extracting that from the total loss. This paper introduces a method for measuring the winding loss of gapped inductors based on magnetic field equivalence. The gapless inductor with the winding for equivalent air-gap was constructed to characterize the magnetic field within the core window of the gapped inductor, and the auxiliary winding was used to replace the winding of the gapped inductor to generate the equivalent magnetizing magnetomotive force. Based on the transformer winding short-circuit method with the small-signal impedance test, the winding loss was separated from the core loss. After the resistance of auxiliary winding was measured by using an air-core inductor, the winding loss of the gapped inductor was consequently obtained. The proposed scheme was applied to inductors made of different sizes and structures, and the measured errors were within 20% in the range of 100 kHz to 1 MHz. The winding loss had a steeper growth tendency in this range than the lower frequency, so the proposed method is effective at high switching frequencies especially.

关键词： Windings Inductors Loss measurement Magnetic flux Magnetic field measurement Air gaps Magnetic separation

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The Evolution of Cooperation in Multiplayer Snowdrift Games with Environmental Feedback 43

The Evolution of Cooperation in Multiplayer Snowdrift Games ...

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43rd Chinese control Conference, CCC 2024

作者： Sun, Tao Liang, Haili Yu, Xiaotong Zhou, Zhao Xu, Yang Shanghai University Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and Automation Shanghai200444 China East China University of Science and Technology Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education Shanghai200237 China

ISBN: (纸本)9789887581581

Human societies and natural environments form a complex ecological system, in which human activities can change the ecological environment, the changes in the ecological environment can influence human social activities in reverse. This paper introduces a punitive mechanism as environmental feedback into co-evolutionary systems, and proposes a replicator dynamic model which aims to explain the evolutionary strategies adopted by populations for the multiplayer snowdrift games. We obtain the necessary and sufficient condition for the existence and stability of the internal equilibrium point by studying on the Jacobian matrix, and the effectiveness of the theoretical results is examined by numerical simulations. We identify that the threshold parameter in multiplayer snowdrift games determines the evolution of the closed-loop system. Specifically, the system exhibits limit cycles when the threshold is small enough. As the threshold increases, the system converges to a stable internal equilibrium point. Finally, if the threshold reaches a sufficiently large value, the proportion of cooperators in the population is high, while the group of punishers becomes extinct, indicating the loss of environmental feedback. © 2024 Technical Committee on control Theory, Chinese Association of automation.

关键词： Anthropogenic

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Sensitivity Analysis of Thermal Runaway Side Reaction of Lithium Batteries Based on Morris Method 9

Sensitivity Analysis of Thermal Runaway Side Reaction of Lit...

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9th International Symposium on System Security, Safety, and Reliability, ISSSR 2023

作者： Man, Zhiyi Wang, Shaoping Zhang, Chao Zhu, Yun Beihang University School of Automation Science and Electrical Engineering Beijing100191 China AECC Aero-Engine Control System Institute Jiangsu Wuxi214100 China

ISBN: (纸本)9798350302479

In the field of electric vehicles, the safety of power lithium-ion batteries is a socially important issue, and the study of thermal runaway of lithium batteries is now gradually becoming more in-depth. In this paper, the output parameters are up-dimensioned. Using a global sensitivity analysis method based on the Moms screening method, the influence of 11 parameters such as volume of the cell(vBt), mass of the cell(mBt) and electrolyte concentration (W_e) on the thermal runaway process of Li-ion batteries is analyzed, and the variation of 10 variables such as temperature(T) and carbon dioxide gas (CO2) produced in the thermal runaway side reaction heat generation process and chemical reaction gas generation process over time is investigated under the influence of the parameter factors. In the study, the sensitivity of the parameters over a time interval is investigated in the rising dimension of the time domain. The results show that the overall effect of the parameters on the thermal process;for the output variables of the thermal process, they are mainly affected by the mass of the cell (m_Bt), the thickness of the SEI film (t_sei) and the specific heat capacity of the cell(Cp_Bt), while the chemical process is not significantly affected by the different parameters;among all the parameters, the volume (V_Bt) of the cell interacts most strongly with the other parameters for all the output variables. Finally, the results of the sensitivity analysis of the thermal runaway side reactions of the battery will be applied to the subsequent 3D simulation study. © 2023 IEEE.

关键词： Lithium-ion batteries

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