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On-Line Conference (ONCON), Industrial Electronics Society Annual

作者： Yu Zhang Yajing Li Guangtao Ran Hao Yu Guangfu Ma Department of Automation Harbin Institute of Technology (Shenzhen) Shenzhen China Shanghai Institute of Aerospace System Engineering Shanghai China Department of Control Science and Engineering Harbin Institute of Technology Harbin China School of Automation Beijing Institute of Technology Beijing China

ISBN: (数字)9798331540319

ISBN: (纸本)9798331540326

This paper proposes a dynamic event-triggered control method for first-order multi-agent systems with input delays and disturbances under switching topologies. The controller design and its properties of dynamic event-triggered fixed-time consensus are presented in detail. Furthermore, agents can achieve consensus in a fixed time for any initial conditions and topologies that comply with the control protocol. Zeno behavior is avoided. Simulation examples demonstrate the effectiveness of the proposed algorithm and simulate scenarios in which the communication environment deteriorates due to external disturbances affecting the MASs.

关键词： Industrial electronics Protocols Event detection Switches control systems Stability analysis Topology Delays Numerical stability Multi-agent systems

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A third-party platoon coordination service: Pricing under government subsidies

A third-party platoon coordination service: Pricing under go...

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作者： Bai, Ting Johansson, Alexander Li, Shaoyuan Johansson, Karl Henrik Mårtensson, Jonas School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden KTH Royal Institute of Technology Stockholm Sweden Department of Automation Shanghai Jiao Tong University Shanghai China Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Shanghai China Digital Futures Stockholm Sweden

This paper models a platooning system consisting of trucks and a third-party service provider (TPSP), which performs platoon coordination, distributes the platooning profit in platoons, and charges trucks in exchange for the services. Government subsidies used to incentivize platooning are also considered. We propose a pricing rule for the TPSP, which keeps part of the platooning profit including the subsidy each time a platoon is formed. In addition, a platoon coordination solution based on the distributed model predictive control (MPC) is proposed, in which the pricing rule under government subsidies is integrated. We perform a realistic simulation over the Swedish road network to evaluate the impact of the pricing rule and subsidies on the achieved profits and fuel savings. Our results show that subsidies are an effective mean to boost fuel savings from platooning. Moreover, the simulation study indicates that high pricing corresponds to a low platooning rate of the system, as trucks' incentives for platooning decrease. © 2023 The Authors. Asian Journal of control published by John Wiley & Sons Australia, Ltd on behalf of Chinese Automatic control Society.

关键词： Trucks

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Practical Distance-Based Formation Stabilization and Tracking of Nonholonomic Multi-agent systems 7th

Practical Distance-Based Formation Stabilization and Tracki...

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7th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2023

作者： Tang, Xiangyu Yu, Jianglong Dong, Xiwang Yang, Xiangyu Ren, Zhang School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Institute of Artificial Intelligence Beihang University Beijing100191 China Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory Beijing100074 China

ISBN: (纸本)9789819733279

This paper investigates practical distance-based formation stabilization and tracking issues for nonholonomic multi-agent systems (MASs). Firstly, the agent’s nonholonomic kinematics is represented as a left invariant system on a Lie group. Through the introduction of an auxiliary state and a virtual control guided by the transverse function method, the original system is effectively converted into a fully actuated one. Secondly, under the assumption of infinitesimal and minimal rigidity in the graph, a gradient-descent-based virtual controller is devised for the transformed MASs, facilitating practical rigid formation stabilization. Thirdly, a discontinuous distributed velocity estimator is designed for formation tracking. The nonholonomic MASs achieve the desired formation shape while effectively tracking the reference trajectory. Finally, the effectiveness of the proposed method is verified by numerical examples. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Multi agent systems

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Offline detection technology of source-network coordination performance of generator network-related protection 38

Offline detection technology of source-network coordination ...

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38th Youth Academic Annual Conference of Chinese Association of automation, YAC 2023

作者： Nian, Ming Yu, Dahai Li, Yan Capital Engineering & Research Incorporation Ltd. Electrical & Automation Engineering Technical Institute Beijing China China Electric Power Research Institute Power System Department Beijing China China Electric Power Research Institute Artificial Intelligence Application Department Beijing China

ISBN: (纸本)9798350303636

The geographical distribution of energy resources in China is very uneven, whether it is conventional energy or renewable clean energy. In addition, with the growth of electricity demand, the proportion of the grid in the energy transmission system is increasing, and the continuous growth of load size and cross-regional power flow scale promotes the expansion of the grid size and the increase of the grid complexity. The complexity of power grid security and stability control will be greatly increased and the centralized access of large renewable energy bases will bring new technical problems to the safe operation of power grid. The sending end is connected to a large number of renewable energy sources, such as wind power generation, and the power fluctuation is large. In addition, the UHV DC project is in the early stage of operation, the construction of supporting facilities is weak, and the UHV DC near generators are in a critical state for a long time. At this point, generator stator and rotor overcurrents and other limits may operate when renewable energy power fluctuates, and it is difficult to objectively assess the compatibility of limits and protections due to the wide variation in the implementation principles of limits and protections among different manufacturers. When the system fails or fails, the control system of the generator set will participate in the adjustment to restore the system to a stable operating state. If the control system parameters and protection are not properly coordinated, protection may be caused before the control action, and the generator set will be cut off. The system that has been hit loses more active and reactive power support, and the power system's performance deteriorates. Therefore, it is necessary to study the evaluation indexes of the protection and control of the near area generator set of UHV DC project and the cooperation performance of the grid. © 2023 IEEE.

关键词： generator network-related protection Offline detection source-network coordination

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An omnidirectional asymmetric mobile robot for narrow aisle spaces 10

An omnidirectional asymmetric mobile robot for narrow aisle ...

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10th Indian control Conference, ICC 2024

作者： Arunkumar, G.K. Devkar, Samadhan Vachhani, Leena Kunwar, Ambarish Technology Innovation Hub fot IOT and IoE Indian Institute of Technology Bombay Mumbai India Department of Biosciences and Bioengineering Indian Institute of Technology Bombay Mumbai India Department of System and Control Engineering Indian Institute of Technology Bombay Mumbai India

ISBN: (纸本)9798331517212

The constrained spaces in narrow aisles of airplanes and manufacturing facilities limit the use of mobile robots. Utilizing Mecanum wheels allows mobile robots to move smoothly in any direction without needing to turn, enhancing maneuverability and efficiency in constrained environments. However, the sizeable Mecanum wheel and the individual motor assembly required for independent control restrict its use in mobile robot designs for maneuvering in narrow spaces. This work proposes an asymmetric design to overcome the challenge of using Mecanum wheels in small-size robots and analyses the kinematic requirements due to asymmetric design. Numerical simulation and experimental tests confirm the platform’s ability to navigate tight spaces, make sharp turns, and carry various payloads, significantly improving operational efficiency. The proposed asymmetric mobile robot offers a practical solution for enhancing the performance of automated guided vehicles (AGVs) and robotic systems in space-limited settings. © 2024 IEEE.

关键词： Mobile robots

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Variable Frequency Phase-Shift Modulation Technique for Single Stage Dual-Active-Bridge AC-DC Converter 11

Variable Frequency Phase-Shift Modulation Technique for Sing...

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11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Guo, Dongxin Wang, Panbao Ren, Chunguang Guerrero, Josep M. Harbin Institute of Technology School of Electrical Engineering and Automation Harbin China Taiyuan University of Technology Shanxi Key Lab. of Power System Operation and Control Taiyuan China Aalborg University Department of Energy Technology Aalborg Denmark

ISBN: (纸本)9788957083505

This article proposes a variable frequency phase-shift modulation technique for single stage dual-active-bridge (DAB) AC-DC converter. This isolated single-stage single-phase converter consists of a DAB and a full bridge (FB) inverter. The proposed strategy applies a composite control strategy combining frequency modulation and extended phase shift (EPS) method to overcome the drawback of the non-linear power control of traditional phase-shift control scheme, which significantly reduces the complexity of the controller algorithm. Moreover, the synchronous inverter control applied to the back-end FB inverter is designed, which can realize the energy conversions in a single-stage, and a high frequency (HF) filter capacitor can replace the electrolytic capacitor at the output side DC-link. Thus, the safety of system operation improves and the power density of the system increases. Finally, simulation results confirm the validity and practical feasibility of the proposed control strategy. © 2023 The Korean institute of Power Electronics.

关键词： Electrolytic capacitors

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Augmenting Vision with Radar for All-weather Geo-localization without a Prior HD Map

Augmenting Vision with Radar for All-weather Geo-localizatio...

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IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Can Dong Ziyang Hong Siru Li Liang Hu Huijun Gao Department of Automation School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen China Department of Control Science and Engineering Harbin Institute of Technology Harbin China

ISBN: (数字)9798350377705

ISBN: (纸本)9798350377712

Accurate and robust geo-localization in all-weather conditions is essential for enabling autonomous vehicles and delivery robots to offer uninterrupted mobility services in the real world. In this paper, we propose the first camera and radar fusion based geo-localisation method that is robust to all-weather conditions. The core of the proposed method is to leverage the rich semantics information in images and sensing consistency in radars across all-weather. Our proposed method surpasses the state of the art camera-based and LiDAR-camera based methods in inclement weather conditions, shown by extensive comparative experiments. Notably, our approach requires only an open accessible map, eliminating the need for high-definition maps and offering a cost-effective solution for geo-localizing or globally localizing autonomous vehicles in any weather condition. Our code and trained model will be released publicly.

关键词： Accuracy Robot vision systems Radar Radar imaging Cameras Feature extraction Sensor systems Sensors Autonomous vehicles Meteorology

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Failure Detection from the Knocking Sounds Using Convolutional Neural Network 38

Failure Detection from the Knocking Sounds Using Convolution...

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38th IEEE Region 10 Conference, TENCON 2023

作者： Areerob, Punyapat Sum, Rithea Khongprasongsiri, Chanon Boonto, Sudchai King Mongkut's University of Technology Thonburi Department of Control System and Instrumentation Engineering Bangkok10140 Thailand National Astronomical Research Institute Thailand

ISBN: (纸本)9798350302196

Toilet quality assurance is a crucial process in ensuring lavatories meet rigorous performance, durability, and hygiene standards. The current standard of Maximum Performance (MaP) testing faces challenges, leading researchers to explore innovative approaches such as sound source classification for quality assurance. This approach involves collecting a diverse dataset of lavatory sounds and extracting relevant acoustic features. Deep learning models, particularly convolutional neural networks (CNNs), are trained on these features to accurately classify sound sources. The trained models were evaluated and compared by considering metrics such as classification accuracy, computational complexity, and model parameters. This paper performs these tests and chooses the most effective model to enhance the quality assurance process for toilets. Incorporating sound source classification techniques has several benefits, including the optimization of testing processes, non-intrusive performance assessment, and efficient resource utilization through targeted testing and troubleshooting. By improving the standards of lavatory quality, this approach ensures enhanced performance, durability, and hygiene of lavatories. © 2023 IEEE.

关键词： Convolution

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A Hardware-Efficient Vector Limiter Algorithm and Its Programmable Logic Realization

A Hardware-Efficient Vector Limiter Algorithm and Its Progra...

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China International Electrical and Energy Conference (CIEEC)

作者： Zhao Song Yiyan Wang Tianyi Xiong Computer and Electronics System and Engineering Department AVIC Xi'an Flight Automation Control Research Institute (FACRI) Xi'an Shanxi Province China

ISBN: (数字)9798350359558

ISBN: (纸本)9798350359565

Vector limiter is a computationally complex component of vector control, but its hardware-friendly algorithm is rarely discussed. This paper presents an efficient solution with pure shift-and-add operations, namely the dual vector rotation algorithm (DVRA). Its programmable logic realization is also provided. The DVRA is then simulated in a motor driving system, and physical validation is made on a Xilinx FPGA. Furthermore, performance comparison is conducted between the DVRA and four control groups (conventional algorithms). All control groups are built by Xilinx IPs under diversified configurations, thus human bias can be minimized. Post-implementation results evince that the DVRA exhibits significantly less resource expenditure and better timing, with power consumption and accuracy comparable to the control groups.

关键词： Power demand Accuracy Motors Vectors Hardware Timing system-on-chip

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Unraveling climate change-induced compound low-solar-low-wind extremes in China

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国家科学评论（英文版） 2025年第1期12卷 92-105页

作者： Licheng Wang Yawen Liu Lei Zhao Xi Lu Liangdian Huang Yana Jin Steven J.Davis Amir Aghakouchak Xin Huang Tong Zhu Yue Qin College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China Institute of Carbon Neutrality Peking UniversityBeijing 100871China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Department of Civil and Environmental Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA National Center for Supercomputing Applications University of Illinois at Urbana-ChampaignUrbanaIL 61801USA School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China Department of Earth System Science University of CaliforniaIrvineIrvineCA 92697USA Department of Earth System Science University of CaliforniaIrvineIrvineCA 92697USA Department of Civil and Environmental Engineering University of CaliforniaIrvineIrvineCA 92697USA

China's pursuit of carbon neutrality targets hinges on a profound shift towards low-carbon energy,primarily reliant on intermittent and variable,yet crucial,solar and wind power *** particular,low-solar-low-wind(LSLW)compound extremes present a critical yet largely ignored threat to the reliability of renewable electricity *** existing studies have largely evaluated the impacts of average climate-induced changes in renewable energy resources,comprehensive analyses of the compound extremes and,particularly,the underpinning dynamic mechanisms remain *** we show the dynamic evolution of compound LSLW extremes and their underlying mechanisms across China via coupling multi-model simulations with diagnostic *** results unveil a strong topographic dependence in the frequency of compound LSLW extremes,with a national average frequency of 16.4(10th-90th percentile interval ranges from 5.3 to 32.6)days/yr,when renewable energy resources in eastern China are particularly compromised(～80％lower than that under an average climate).We reveal a striking increase in the frequency of LSLW extremes,ranging from 12.4％under SSP126 to 60.2％under SSP370,primarily driven by both renewable energy resource declines and increasingly heavily-tailed distributions,resulting from weakened meridional temperature(pressure)gradient,increased frequency of extremely dense cloud cover and additional distinctive influence of increased aerosols under *** study underscores the urgency of preparing for significantly heightened occurrences of LSLW events in a warmer future,emphasizing that such climate-induced compound LSLW extreme changes are not simply by chance,but rather projectable,thereby underscoring the need for proactive adaptation *** insights are crucial for countries navigating a similar transition towards renewable energy.

关键词： wind energy solar energy renewable energy climate change compound energy droughts

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