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16th Annual Conference of China Electrotechnical Society, CES 2021

作者： Niu, Chen Wang, Guo School of Automation and Electrical Engineering Lanzhou Jiaotong University Gansu Lanzhou730070 China Key Laboratory of Opto-Technology and Intelligent Control Ministry of Education Lanzhou Jiaotong University Lanzhou730070 China Rail Transit Electrical Automation Engineering Laboratory of Gansu Province Lanzhou China

ISBN: (纸本)9789811915277

This paper analyzes the influence law of resonance of traction power supply system. First, establish a unified impedance model of the traction power supply system with a source filter in the dq coordinate system;secondly, use the Nyquist criterion to analyze the influence of the parameters of the active filter on the resonance stability of the traction power supply system;Finally, a time-domain simulation model is constructed for verification. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Resonance

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Specific-Time Unknown Input Observer for Lur'e System

Specific-Time Unknown Input Observer for Lur'e System

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2023 International Conference on Neuromorphic Computing, ICNC 2023

作者： Chao, Chengke Huang, Shengchao Lv, Yuezu Shan, Dan Beijing Institute of Technology School of Automation Beijing China Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing China Shenyang Jianzhu University School of Electrical and Control Engineering Liaoning China

ISBN: (纸本)9798350316889

This paper investigates the problem of specific-time state estimation for Lur'e systems with unknown inputs. By analyzing nonlinear Lur'e systems, sufficient conditions for the design of unknown input observers are provided. Then, a specific-time observer is designed, with convergence analysis illustrated. The main advantage of the designed observer can realize accurate estimation of Lur'e system in specific time. Finally, a simulation example of the third-order Chua's circuit is conducted to verify the validity of the proposed specific-time unknown input observer. © 2023 IEEE.

关键词： lur'e systems specific-time observer unknown input observer

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Resilient Cooperative control of Multiple DC Microgrids With Interconnection Networks Against Cyber Attacks

IEEE Transactions on Industrial Cyber-Physical Systems

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IEEE Transactions on Industrial Cyber-Physical Systems 2025年 3卷 116-126页

作者： Xiao, Feng Liu, Shiyu Wei, Bo Fang, Fang Qin, Jiahu North China Electric Power University State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing102206 China North China Electric Power University School of Control and Computer Engineering Beijing102206 China North China Electric Power University New Energy Generation National Engineering Research Center Beijing102206 China University of Science and Technology of China Department of Automation Hefei230027 China

The two control objectives of voltage regulation and precise current sharing are conflicting in multi-bus DC microgrids. In this paper, a distributed control strategy is proposed, and it can achieve accurate current sharing and regulate the voltage of a critical node to the rated value. However, such a distributed control system is susceptible to potential cyber attacks that could deteriorate microgrids performances by corrupting communication links or actuators. To overcome these difficulties, we design the interconnected communication networks to establish a resilient cooperative system of multiple microgrids against unknown bounded injection attacks. The proposed resilient control strategy can achieve the control objectives of maintaining voltage regulation and current sharing within each microgrids under different operating conditions, and the interconnected system consisting of multiple microgrids cooperates to mitigate the adverse effect of cyber attacks. The dynamics and stability of the overall close-loop system of the DC microgrids are analyzed, in the present or absent of cyber attacks. Simulation results validate the effectiveness of the proposed approach in two 4-bus DC microgrids. © 2023 IEEE.

关键词： Cyber attacks

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Evolution of Constellation Reconstruction for Enhanced Regional Communication Capability

Evolution of Constellation Reconstruction for Enhanced Regio...

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2023 China automation Congress, CAC 2023

作者： Dong, Sun Yihan, Liu Han, Yan Xiaochao, Liu Pengyuan, Qi School of Automation Science and Electrical Engineering Beihang University Beijing China Beijing Institute of Control Engineering National Key Laboratory of Space Intelligent Control Beijing100094 China Beijing Sun Wise Space Technology Ltd. Beijing100190 China Research Institute for Frontier Science Beihang University Beijing China

ISBN: (纸本)9798350303759

In the era of global personal communication and the rapid progress of small satellite technology, low-orbit constellations have emerged as a focal point for countries worldwide. These constellations, primarily employed for communication purposes, offer advantages such as enhanced signal strength and shorter revisit cycles due to their proximity to the Earth's surface. However, the high deployment cost associated with the large number of satellites in low-orbit constellations poses a significant challenge. As launch costs continue to decline and the number of satellites in constellations increases, there is a growing interest in leveraging these constellations during times of war or sudden disasters in specific regions. This entails designing communication-enhanced constellations tailored to the targeted area and formulating an active configuration evolution plan that facilitates seamless transition from the existing constellation to the desired configuration. The objective of this paper is to propose a scheme for optimizing constellation parameters to enhance communication capabilities within a specific region. Additionally, an active configuration evolution scheme with minimal fuel consumption is introduced to effectively address emergency scenarios. © 2023 IEEE.

关键词： Orbits

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Adaptive Nonsingular Fast Terminal Sliding Mode Tracking control for Second-order Nonlinear Systems with External Disturbances

Adaptive Nonsingular Fast Terminal Sliding Mode Tracking Con...

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Chinese control and Decision Conference, CCDC

作者： Weihai Zhang Zhikang Sun Wei Wei Xiaoning Lv Tianliang Zhang College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao China School of Information and Control Engineering Qingdao University of Technology Qingdao China

ISBN: (数字)9798350387780

ISBN: (纸本)9798350387797

This paper proposes an adaptive nonsingular fast terminal sliding mode (NFTSM) tracking controller for second-order nonlinear systems with external disturbances. Firstly, a novel NFTSM mainfold is constructed to directly address the singularity issue from the perspective of sliding mode surface design and enhance the convergence speed of the tracking error. Then, in order to achieve more accurate dynamic response on the uncertain nonlinear system, a robust adaptive control strategy is introduced into the sliding mode control strategy to estimate the unknown external disturbance. The system states can converge to an arbitrarily small set around the origin within a finite time. Finally, a simulation example is included to further testify the validity of the proposed control approach.

关键词： Manifolds Upper bound Uncertainty Accuracy Simulation Robustness Nonlinear dynamical systems

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A New Automatic User Calibration Algorithm for Three-Dimensional Gaze Estimation

A New Automatic User Calibration Algorithm for Three-Dimensi...

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2022 International Conference on Machine Learning and Knowledge engineering, MLKE 2022

作者： Sun, Hang Chi, Jiannan Ustb School of Automation and Electrical Engineering Beijing China Shunde Graduate School Ustb Foshan China Engineering Research Center of Intelligence Perception and Autonomous Control Ministry of Education Beijing China

ISBN: (纸本)9781665495677

Gaze estimation systems use subject-specific parameters to estimate the user's gaze direction. Advanced remote gaze estimation systems obtain the parameters including the angles between the visual axis and the optical axes of each eye through the automatic calibration algorithms. In these automatic calibration algorithms, the coordinates of the observation surface should be known when calculating the angles between the visual axis and optical axis. However, in head-mounted systems, the coordinates of the observation surface cannot be determined. This paper proposes a new automatic calibration algorithm that does not require the coordinates of the observation surface and subject' active participation in calibration. In order to estimate the angles between the visual and optical axes of each eye, differential evolution algorithms are used to minimize the distance between the visual axes of the left and right eyes while subjects naturally look at the point of gaze (PoG). Simulation results have demonstrated the effectiveness of the algorithm. © 2022 IEEE.

关键词： Eye tracking

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Self-Tuning Neural Network controller Based on Fuzzy Logic for Multiple Positions Tracking of a Pneumatic Driven Soft Endoscope Actuator

Self-Tuning Neural Network Controller Based on Fuzzy Logic f...

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International Conference on Autonomous Robots and Agents, ICARA

作者： Renzo Acosta Julio Tafur Ruth Canahuire Enginnering Department Control and Automation Engineering Master Degree Program Pontificia Universidad Catolica del Peru Lima Peru Department of Electrical and Mechatronics Engineering Universidad de Ingenieria y Tecnologia - UTEC Lima Peru

ISBN: (数字)9798350394245

ISBN: (纸本)9798350394252

This paper presents the dynamic modelling and end effector position control of a soft endoscope. Soft endoscope system under study consists mainly of a pneumatic driven soft actuator (PDSA) with four independently chambers. Recurrent neural network (RNN) and dynamic back propagation (DBP) training algorithm are used to obtain PDSA dynamic model. PDSA position controller is based on a feedforward neural network (FNN) and it is trained using PDSA closed loop system (CLS) and DBP training algorithm. CLS stability analysis concludes that it is not possible control PDSA end effector position using one position controller for different end effector initial and desired positions. Fuzzy logic methodology is used to integrate several positions controllers in a one controller valid for all operation range. The controller implementation and close loop system simulation are performed in MATLAB for different end effector desired position to validate system performance in all range of operation.

关键词： Training Fuzzy logic Backpropagation Recurrent neural networks Endoscopes Heuristic algorithms Artificial neural networks

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Short-term Wind Power Probabilistic Forecasting Based on Attention Mechanism and Bidirectional LSTM

Short-term Wind Power Probabilistic Forecasting Based on Att...

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2023 International Conference on Smart electrical Grid and Renewable Energy, SEGRE 2023

作者： Wang, Naixiao Cai, Xinlei Xu, Zhuofan Guo, Yufeng Zhang, Tingxiang China Southern Power Grid Company Limited Electric Power Dispatching and Control Center of Guangdong Power Grid Co Guangzhou China Harbin Institute of Technology School of Electrical Engineering and Automation Harbin China

ISBN: (纸本)9798350323269

In order to quantify the uncertainty of regional wind power generation, this paper proposes a probabilistic forecasting method of wind power based on attention mechanism and bidirectional long short-term memory (Bi-LSTM). First, data cleaning is performed on the historical wind power data, and a feature set for prediction model training is constructed. Then, to make the prediction model selectively focus on the information with strong correlation, while ignoring the information with weak correlation, an attention mechanism is introduced to capture the dependencies and relationships between different parts of the input. Afterwards, a Bi-LSTM is used to construct the forecasting model, which realized the long-term memory of the power sequence effectively reduces the occurrence of falling into local optimum. Finally, the currently generated deterministic forecasts are compared with past forecasts, the most similar past forecasts are selected, and the corresponding observations are used to generate probabilistic forecasts. © 2023 IEEE.

关键词： Long short-term memory

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Research on Improved ICP for 3D Reconstruction of Lightning Arrester 5

Research on Improved ICP for 3D Reconstruction of Lightning ...

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5th International Conference on Robotics, Intelligent control and Artificial Intelligence, RICAI 2023

作者： Lu, Senjian Hou, Beiping Zhang, Qinlong Zheng, Yangbin Shao, Fangkun Ge, Shihao Zhu, Wen School of Automation and Electrical Engineering Zhejiang University of Science and Technology Hangzhou310023 China Zhejiang Intl. Science and Technology Cooperation Base of Intelligent Robot Sensing and Control China Technology 310023 China

ISBN: (纸本)9798350357950

The lightning arrester is an electrical device used to prevent damage to the insulation of electrical equipment caused by over voltages, including lightning and switching impulses. Creepage distance, umbrella distance, and diameter are crucial parameters for lightning arrester protection. However, traditional manual detection methods are laborious and cumbersome. Moreover, due to the highly symmetrical structure of the lighting arrester itself, the traditional methods have difficulties such as easy reverse registration, etc. This paper proposes an approach for obtaining multi-angle point cloud maps by using robotic arm and depth camera, and a quadratic point cloud registration algorithm is presented, it incorporates both the FGR (fast global registration) registration and improved ICP (Iterative Closest Point) registration algorithms. Specifically, the FGR registration algorithm is initially employed for the approximate registration of two point-cloud, and then The KICP (ICP uses KDTREE to accelerate the ICP algorithm) is used for fine registration. The experimental results demonstrate that the average registration time is 60% faster than traditional method with high registration accuracy. Therefore, this method has good Real time performance and robustness for reconstructing lightning arrester. © 2023 IEEE.

关键词： improved ICP lightning arrester three-dimensional reconstruction

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A General Method for Optimal Decentralized control with Current State/Output Feedback Strategy

arXiv

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arXiv 2024年

作者： Li, Hongdan Sun, Yawen Zhang, Huanshui College of Electrical Engineering and Automation Shandong University of Science and Technology Shandong Qingdao266590 China The College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao266590 China The School of Control Science and Engineering Shandong University Shandong Jinan250061 China

This paper explores the decentralized control of linear deterministic systems in which different controllers operate based on distinct state information, and extends the findings to the output feedback scenario. Assuming the controllers have a linear state feedback structure, we derive the expression for the controller gain matrices using the matrix maximum principle. This results in an implicit expression that couples the gain matrices with the state. By reformulating the backward Riccati equation as a forward equation, we overcome the coupling between the backward Riccati equation and the forward state equation. Additionally, we employ a gradient descent algorithm to find the solution to the implicit equation. This approach is validated through simulation examples. © 2024, CC BY.

关键词： Decentralized control

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