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6th CAA International Conference on Vehicular control and Intelligence, CVCI 2022

作者： Lin, Zhixiang Xu, Junqi Cao, Guang-Zhong Liang, Tao Huang, Su-dan Shenzhen University Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots Shenzhen China Tongji University National Maglev Transportation Engineering R&d Center Shanghai China The Fourth Engineering Co.led. of China Railway Constraction Bereau Group Changsha China

ISBN: (数字)9781665453745

ISBN: (纸本)9781665453745

In order to suppress the flux and torque ripples of direct torque control (dTC) for permanent magnet synchronous motors (PMSMs), a direct torque control based on voltage vector prediction is proposed in this paper. First, the system model of PMSMs is established. Based on the system model, the voltage vector prediction model is built. The voltage vector predictive torque control algorithm is then designed using the voltage vector prediction model. Moreover, the maximum torque current ratio is deduced applying the defined cost function. Finally, the proposed method is performed via simulation, and the effectiveness of the method proposed in this paper is verified with the comparison results. © 2022 IEEE.

关键词： Forecasting

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Multi-Objective Coordination and Stability control of High Proportion Wind Power System Based on K-domain Tuning damping 19th

Multi-Objective Coordination and Stability Control of High P...

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19th Annual Conference of China Electrotechnical Society, ACCES 2024

作者： Zhang, Qingtao Gao, diju Zhang, dan Cai, Haiqing Gu, Haohan Chen, Wei Wu, Wencong Chen, Zhihao Institute of Logistics Engineering Shanghai Maritime University Shanghai China Institute of Logistic Science and Engineering Shanghai Maritime University Shanghai China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9789819608966

With the further development of "double high" characteristics of power system, the traditional stability problem dominated by synchronous generator has gradually evolved into a new stability problem dominated by power electronic equipment control. In addition, different types of failure problems can occur in wind power systems. In order to achieve multi-objective coordinated and stable operation of high proportion wind power system, a damping control method with parameters tuning is proposed, which includes the design of filtering link and proportional amplification link. Among them, the key parameters of the proportional link are adjusted. Finally, the feasibility of the proposed control method is verified by simulation tests. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Electric power system stability

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Multi-Type Electric Vehicle Schedulability Modeling Method based on User Charging Behavior Characteristics 11

Multi-Type Electric Vehicle Schedulability Modeling Method b...

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11th China International Conference on Electricity distribution, CICEd 2024

作者： Xue, Yinjuan Chen, Qifang Cai, Haiqing Xia, Mingchao Gu, Haohan School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&d Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350368345

With the rapid proliferation of Electric Vehicles (EV s), effectively leveraging the regulation potential of EV charging loads has become a prominent issue. This paper proposes a multi-type EV schedulability modeling method based on the analysis of charging behavior characteristics of different user types. The model comprehensively considers the charging characteristics of various types of EV s, including private cars, ride-hailing vehicles, and taxis, utilizing a charging start-stop probability distribution model. Case studies demonstrate that this model can not only accurately reflect the charging demands of EV s but also provide valuable references for strategies involving EV fleet participation in grid regulation. © 2024 IEEE.

关键词： Charging stations

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Active disturbance rejection Position control of Permanent Magnet Linear Synchronous Motors Using Feedback Nonlinear State Error 2

Active Disturbance Rejection Position Control of Permanent M...

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2nd International Conference on Sensing, Measurement and data Analytics in the Era of Artificial Intelligence, ICSMd 2021

作者： Xiao, Yang Huang, Sudan Cao, Guangzhong Wang, Huaizhi Xu, Junqi Shenzhen University Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots Shenzhen China Tongji University National Maglev Transportation Engineering R&D Center Shanghai China

ISBN: (纸本)9781665427470

Permanent magnet linear synchronous motors (PMLSMs) have the advantages of simple structure, high efficiency, high accuracy, and direct drive. However, the motion accuracy of PMLSMs is hindered due to the negative effect of various disturbances directly acting on the mover, and thus, the development of effective control method against disturbances is a key task for PMLSMs. An active disturbance rejection position control method of PMLSMs using feedback nonlinear state error is proposed to achieve precision motion against disturbances in this paper. The electromagnetic thrust model and the dynamics model of PMLSMs are firstly established. Subsequently, an active disturbance rejection position controller is developed based on the nonlinear state error feedback. In order to reduce the number of control parameters and the jitter of control law, a sliding mode controller based on an improved exponential convergence law is designed to optimize the nonlinear state error feedback control law. In addition, the performance of the extended state observer and an improved nonlinear state error feedback control law are discussed, and the optimal control parameters are determined using the simplex method. Finally, simulation results demonstrate the implementation of high-precision motion and the improvement of anti-interference capability for the PMLSMs, and the effectiveness of the proposed method is verified. © 2021 IEEE.

关键词： Sliding mode control

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Pressures monitored by 3d printed capacitive pressure sensor embedded on prosthetic upper-limb socket;a case study

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Journal of Biomechanical Science and engineering 2021年第3期16卷 1-9页

作者： Lee, Sunkon Kwon, Hyeonjung Jung, Sung-Yoon Shin, Hyun-Jun Kwon, Chil-Yong Kim, Joo-Hyung Lab. of Intelligent Devices and Thermal Control Department of Mechanical Engineering Inha University 100 Inha-ro Michuhol-gu Incheon22212 Korea Republic of Advanced Prosthesis R&D Team Korea Orthopedics & Rehabilitation Engineering Center 10 Beon-gilGyeongin-ro Bupyeong-gu Incheon21417 Korea Republic of

The comfort fit of a limb prosthetic socket is one of the most important considerations for developing the socket for an amputee. The pressure at the touchpoint, which is the interface between the residual limb with natural skin and the prosthetic limb socket with a polymeric material, should be monitored precisely when fabricating the comfort fit. Even a small volume or shape discrepancy between the residual limb and prosthetic limb sock causes several problems in the residual limb, such as skin breakage, tissue irritation, and associated pain. Volume variations of the residual limb due to squeezing by a prosthetic limb sock result in pressure changes that can be detected using a pressure sensor. In this study, the interface pressures between the residual limb and prosthetic upper-limb socket were obtained using a 3d printed capacitive pressure sensor. An upper-limb prosthetic socket and capacitive pressure sensor were fabricated using a dual nozzle 3d Fused deposition Modelling technique. Polylactic acid, polylactic acid-carbon black compound, and polyurethane were used as the personalized upperlimb socket and sensing electrode, and substrate material, respectively. The as-fabricated sensors were embedded into the sock wall, and their sensing properties were characterized. For a case study, the sensor-embedded sockets were worn on an amputee's residual upper-limb to characterize empirically the contact pressure occurring at the interfaces. A weight was attached to the end of the limb socket to examine the effects of weight on the local pressures acting on the residual upper limb. The observed interface pressures and pressure distribution at the interface can provide valuable information to clinicians and developers that can guide fit improvements. © 2021. All rights reserved.

关键词： Pressure sensors

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Cyber-Attack risk Assessment and Prevention Strategy of Substations Based on dynamic Attack and defense Game 3

Cyber-Attack Risk Assessment and Prevention Strategy of Subs...

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3rd Power System and Green Energy Conference, PSGEC 2023

作者： Lin, Feng Mei, Yong Zhu, Yihua Chang, dongxu Liu, ren Guo, Hengdao China Southern Power Grid Power Dispatch and Control Center GuangZhou China Electric Power Research Institute China Southern Power Grid State Key Laboratory of Hvdc GuangZhou China Electric Power Research Institute China Southern Power Grid National Energy Power Grid Technology R&d Centre GuangZhou China China Southern Power Grid Csg Key Laboratory for Power System Simulation GuangZhou China Guangdong Provincial Key Laboratory of Intelligent Operation Control for New Energy Power System GuangZhou China

ISBN: (纸本)9798350340099

With the improvement of the informatization of the power system, the risk of cyber attack is also increasing. This paper proposes a risk assessment and prevention strategy for cyber attack against substations. Firstly, the cyber attack against substations are modeled based on the game theory of dynamic attack and defense. Secondly, an improved OPA (OrNL-PSErC-Alaska) model is utilized to analyze the cascade failure after cyber attacks and quantify the load loss of power system. Finally, a preventive strategy which can mitigate the expectation load loss caused by cyber attack against substations is put forward. simulation experiments were conducted to validate the effectiveness of the proposed method. © 2023 IEEE.

关键词： risk assessment

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Conflict Mechanism Analysis Method for Electric Vehicles Participating in Multiple Types of Power Grid Ancillary Services

Conflict Mechanism Analysis Method for Electric Vehicles Par...

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2023 International Conference on Power System Technology, PowerCon 2023

作者： Xue, Yinjuan Chen, Qifang Cai, Haiqing Xia, Mingchao Gu, Haohan School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid National Energy Power Grid Technology R&d Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350300222

As the high-quality flexible resource of the grid, electric vehicles (EVs) can provide multiple auxiliary services for the grid at the same time. However, due to the one-way charging and discharging of EVs, as well as the limitation of power and capacity, which may cause availability conflicts when EVs participate in different auxiliary services simultaneously. This paper focuses on the analysis of the conflict mechanism of EVs participating in the secondary frequency regulation and peak shaving ancillary services at the same time. The impact mechanism between different auxiliary services in this conflict mode is revealed from the two aspects of limit conflict and charging and discharging instruction conflict, and the results of availability conflict of the two types of auxiliary services are verified and analyzed through simulation examples. © 2023 IEEE.

关键词： Frequency modulation

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Low-Frequency Structure-Borne Noise Identification Based on FastICA-WPA Algorithm

Low-Frequency Structure-Borne Noise Identification Based on ...

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International Conference on Advanced robotics and Mechatronics (ICArM)

作者： Qiang Liu Jianxin Zhu National Enterprise R&D Center Hunan Research Center of Geotechnical Construction Equipment and Control Engineering Sunward Intelligent Equipment Co. Ltd. Changsha China State Key Laboratory for High Performance Complex Manufacturing Central South University Changsha China

Low-frequency structure-borne noise in enclosed space is easy to produce booming sensation, which seriously affects the auditory comfort. But its sources are complex and the transmission path is strongly coupled, meanwhile it is difficult to be directly measured by experiments, so making identification difficult. To address the problem of decoupling multi-source mixed signals, this paper proposes a low-frequency structure-borne noise identification method based on FastICA-WPA algorithm. Using FastICA (Fast algorithm of Independent Component Analysis) algorithm to identify the structure-borne noise components in single-channel noise, then WPA (Wavelet Packet Analysis) method is applied to identify the low-frequency components of structure-borne noise. Finally decouple the contribution of low-frequency structure-borne noise. This method is applied to an intelligent excavator cab. The correctness of the method is verified by applying vibration signal correlation analysis. The identification algorithm lays the foundation for developing a low-frequency structure-borne noise control strategy.

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A real-time Critical-scenario-generation Framework for Testing Autonomous driving System

arXiv

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arXiv 2022年

作者： Xie, Yizhou dai, Kunpeng Zhang, Yong School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China National Engineering Laboratory for Automotive Electronic Control Technology Shanghai Intelligent and Connected Vehicle R&D Center Shanghai China

In order to find the most likely failure scenarios which may occur under certain given operation domain, critical-scenario-based test is supposed as an effective and widely used method, which gives suggestions for designers to improve the developing algorithm. However, for the state of art, critical-scenario generation approaches commonly utilize random-search or reinforcement learning methods to generate series of scenarios for a specific algorithm, which takes amounts of computing resource for testing a developing target that is always changing, and inapplicable for testing a real-time system. In this paper, we proposed a real-time critical-scenario-generation (rTCSG) framework to address the above challenges. In our framework, an aggressive-driving algorithm is proposed in controlling the virtual agent vehicles, a specially designed cost function is presented to guide scenarios to evolve towards critical conditions, and a self-adaptive coefficient iteration is designed that enable the approach to operate successfully in different conditions. With our proposed method, the critical-scenarios can be directly generated for the target under test which is a black-box system, and the real-time critical-scenario test can be brought into reality. The simulation results show that our approach is able to obtain more critical scenarios in most conditions than current methods, with a higher stability of success. For a real-time testing, our approach improves the efficiency around 16 times. © 2022, CC BY.

关键词： Testing

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A real-time Framework of Multi-Camera Vehicle Tracking System*

A Real-time Framework of Multi-Camera Vehicle Tracking Syste...

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IEEE International Conference on real-time Computing and robotics (rCAr)

作者： Hanyang Zhuang Xingyuan Chen Jianglin Lan Ying Wang Zhaoxuan Lu Chunxiang Wang Ming Yang University of Michigan - Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai China James Watt School of Engineering University of Glasgow Glasgow United Kingdom School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China Shanghai Intelligent and Connected Vehicle R&D Center Co. LTD Shanghai China Department of Automation Shanghai Jiao Tong University Shanghai Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China

ISBN: (数字)9798350372601

ISBN: (纸本)9798350372618

Multi-camera vehicle tracking (MCVT) system is a key technology to build an intelligent city and intelligent transportation system. The MCVT system utilizes roadside monitoring devices and computing platforms to achieve city-level road traffic perception at a finer scale by tracking each vehicle on the road to obtain the trajectory. The existing MCVT system mainly focuses on dealing with the algorithm modules separately, without studying the real-time performance and system architecture of the entire pipeline. However, in real-world applications, many of the tricks in improving evaluation metrics are not applicable since there is endless traffic flow running all the time. Therefore, this paper proposes a real-time framework of the MCVT system to streamline all the algorithm modules with proper data flow. Firstly, a multi-threaded multi-vehicle tracking (MVT) module is developed to detect vehicles in each camera. re-identification is implemented during MVT to provide the feature for tracking in the same camera and across different cameras. Then, after the vehicle leaves the camera field of view, the feature of vehicle trajectory is calculated by averaging the feature at each frame. Meanwhile, a background thread runs continuously to match the incoming feature of vehicle trajectory with past features by conducting a topology searching method. In the end, the vehicle trajectories with well-matched features are considered to be the same vehicle. The entire pipeline has been validated on two different datasets, the precision is 0.64 in the CityFlow dataset which uses 6 cameras simultaneously. In the customized dataset, the same method can still reach real-time when using 16 cameras at the same time with smaller network modules.

关键词： Visualization Target tracking roads Human-machine systems Pipelines Urban areas Cameras

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