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24th COTA International Conference of Transportation Professionals: Resilient, Intelligent, Connected, and Lowcarbon Multimodal Transportation, CICTP 2024

作者： Wang, Yuchen Yu, Hao Han, Yu Li, Zhenning Li, Jiaxin Jiangsu Key Laboratory of Urban ITS Jiangsu Collaborative Innovation Center of Modern Urban Traffic Technologies School of Transportation Southeast Univ. Nanjing China State Key Laboratory of Internet of Things for Smart City Dept. of Civil and Environmental Engineering Univ. of Macau China School of Transportation Southeast Univ. Nanjing China

ISBN: (数字)9780784485484

ISBN: (纸本)9780784485484

This paper presents a continuous-time dynamic system optimum model for Link-Based Dynamic Network Loading, which aims to determine the minimum total travel time. To account for lane-changing effects and spillbacks, a link-based double queue model is utilized and extended into the Lane-Changing double queue model by incorporating the concept of lane-changing intensity. To address the time-varying nonlinear component resulting from lane-changing intensity, a solution approach combining a heuristic genetic algorithm and a linear programming solver is proposed. Its objective is to find an optimal solution by approximating the actual values of lane-changing intensity. The effectiveness of the proposed model and solution procedure is evaluated using a network with multiple OD pairs in numerical experiments. The results provide empirical evidence of the model’s ability to capture lane-changing effects. © ASCE.

关键词： Queueing theory

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Relative/AbSwectsolute Altitude Fusion Technology Oriented to the Complex Environment of Plateau Airports

Relative/AbSwectsolute Altitude Fusion Technology Oriented t...

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International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Qu, Xiaowei Dai, Yuting Li, Zhimin Lyu, Pin Lai, Jizhou Navigation Research Center College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing211100 China Key Laboratory of Internet of Things and Control Technology in Jiangsu Province Nanjing University of Aeronautics and Astronautics Nanjing211100 China

ISBN: (纸本)9789811966125

The operation safety of the civil aircraft at plateau airports is a hot topic in civil aviation. In the terminal area of plateau airports, the navigation performance of the aircraft is easily affected by complex terrain and varied climate, and the single sensor’s altitude information is unreliable, which threatens flight safety. Therefore, in order to guarantee the safety and reliability of civil aircrafts in vertical direction under the complex environment, this paper constructed a unified model of altitude datum for heterogeneous sensors and proposed a relative/absolute altitude fusion method based on terrain state recurrence and barometric altitude assistance. It sets terrain height to a state and integrates atmospheric data system and radio altimeter with inertial navigation system simultaneously, which improves the vertical accuracy and estimates the terrain height effectively. In conclusion, this method can ensure the vertical safety of the civil aircraft flying under the complex environment of plateau airports. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Airports

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Hybrid Fuzzy Logic control Scheme of the PEM Fuel Cell Air Feed System

Hybrid Fuzzy Logic Control Scheme of the PEM Fuel Cell Air F...

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International Conference on Guidance, Navigation and control, ICGNC 2020

作者： Zhu, Jing Wu, Kang Jiang, Bin College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Ministry of Industry and Information Technology Jiangsu Key Laboratory of Internet of Things and Control Technologies Nanjing University of Aeronautics and Astronautics Nanjing China

ISBN: (纸本)9789811581540

The primary control task of a proton exchange membrane (PEM) fuel cell air feed system is to regulate the oxygen excess ratio (OER). A new hybrid fuzzy logic control (FLC) scheme is proposed in this paper to drive OER to the desired value, thus the oxygen starvation is effectively avoided. The hybrid controller consists of the fuzzy logic controller, the fuzzy self-tuning (FST) PID controller and the switching system, where the optimal controller is selected in real-time by the switching system upon the tracking error of OER. The proposed hybrid FLC scheme demonstrates the advantages of quick response and high tracking accuracy. Moreover, it is also applicable to PEM fuel cell systems with fluctuating stack current and air leakage fault. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： controllers

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Influence of contact layer on the sulphur corrosion of copper conductors in power transformers

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High Voltage 2022年第1期7卷 176-184页

作者： Lijun Yang Dong Ding Yuan Yuan Sihang Gao Yuncai Lu State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChongqingChina College of Material Science and Engineering Chongqing UniversityChongqingChina Key Laboratory of Industrial Internet of Things and Networked Control Ministry of EducationChongqing University of Posts and TelecommunicationsChongqingChina State Grid Jiangsu Electric Power Co. Ltd.Electric Power Research InstituteNanjingChina

Owing to the corrosive sulphides in the mineral insulating oil such as dibenzyl disul-phide(DBDS),copper windings in oil‐immersed transformers may suffer sulphur *** study investigates the influence of different contact conditions on the corrosion of copper conductors in ***‐immersed accelerated corrosion experiment was conducted on copper conductors with various contact materials and different layers of insulating *** surface micromorphology,deposition compo-nent and the potentiodynamic polarization characteristics of copper conductors were *** results show that copper with different contact materials suffer sulphur corrosion;conversely,bare copper rarely *** was also verified that the existence of a particular gap between copper and contact layer is a significant factor in sulphur corrosion by the formation of a concentration cell on the copper *** insu-lating paper wrapped around copper conductors does not increase the corrosion ten-dency of copper;however,it contributes to the formation of a region concentrated with DBDS,Cu^(2+),H^(+)by adsorption and impediment,which plays a key role in facilitating the sulphur corrosion of copper ***,sulphur corrosion can also occur on other metal parts in transformers when there is a particular gap on surfaces other than copper.

关键词： corrosion copper sulphur

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LiDAR-Based Autonomous Exploration Using Local and Global RRT for MAV

LiDAR-Based Autonomous Exploration Using Local and Global RR...

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International Conference on Guidance, Navigation and control, ICGNC 2020

作者： Zou, Bingqian Lai, Jizhou Lyu, Pin Fang, Wei Navigation Research Center College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing211100 China Key Laboratory of Internet of Things and Control Technology in Jiangsu Province Nanjing University of Aeronautics and Astronautics Nanjing211100 China

ISBN: (纸本)9789811581540

Exploring and mapping an unknown space is a fundamental task for autonomous robots. Various exploration planners employ the scheme which directing the robots to the frontiers. Frontiers are the boundaries between the known and unknown space. This paper presents a new exploring strategy based on local and global Rapidly-exploring Random Trees (RRTs) for frontier detecting. The global RRT starts from the starting position and extends outwards looking for frontiers. The local RRT starts from the position of the MAV. It resets the local tree while finding the frontier and output the desired path for MAV. The proposed exploring planner can find frontiers faster and the global tree ensures the complete exploration results. The proposed planner is capable of running online. It is implemented and tested on the GAZEBO with a PX4 quadrotor. For future effort, it can be extended to multi-agent systems. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Multi agent systems

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GPP estimation of a grassland ecosystem based on photosynthesis-hydrology coordination optimization

GPP estimation of a grassland ecosystem based on photosynthe...

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2024 China Automation Congress, CAC 2024

作者： Fu, Lijiang Tan, Jinglu Jiang, Yongnian Allakhverdiev, Suleyman I. Xu, Zhenyu Guo, Ya Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University Wuxi China Department of Chemical & Biomedical Engineering University of Missouri ColumbiaMO United States Jiangsu Zhongnong IoT Technology Co. LTD Yixing China Timiryazev Institute of Plant Physiology RAS Moscow Russia Longcom Internet of Things Co. Ltd Hefei China Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University Wuxi China

ISBN: (纸本)9798350368604

Accurate estimation of gross primary production (GPP, ecosystem level photosynthesis) is critical for monitoring terrestrial ecosystems. However, most of the current models used for GPP estimation are with many unknown parameters and rarely include the effects of soil water stress due to the covariation of soil moisture and air humidity. In addition, grasslands, as the most widely distributed ecosystems in the world, have simple ecosystem structure and are easily affected by soil drought. Therefore, in this paper, we applied photosynthesis-hydrology coordination optimization theory and soil water potential based on soil moisture effect to develop a combined model (PH model) for GPP estimation of grassland ecosystems and used the US-Var grassland ecosystem, one of the FLUXNET sites from January to July 2004 (the driest period in recent years) as an example to validate the model. The results show that the model can effectively track the measured GPP during soil drought period and is better than the result from another commonly used photosynthesis coordination model (P-model) which does not consider the effect of soil drought. Further, we can infer the vegetation photosynthetic capacity parameters including the maximum carboxylation capacity (Vcmax) and the maximum electron-transport capacity (Jmax) under the effect of soil drought. The result also shows that if soil drought is not considered, the photosynthetic capacity parameters of vegetation will be overestimated. These results provide evidence for the application of photosynthesis-hydrology coordination theory in the assessment of ecosystem carbon cycle under the intensified climate changes. © 2024 IEEE.

关键词： coordination optimization theory GPP estimation soil drought

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Research on a Novel control Method for Effectively Reducing Slip Loss Applied to Brushless Doubly-fed Machine 6

Research on a Novel Control Method for Effectively Reducing ...

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6th International Symposium on Autonomous Systems, ISAS 2023

作者： Li, Yang Wang, Nannan Lu, Ningyun Wang, Xiuli Jiang, Bin Shanghai University Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and Automation Shanghai China Tianjin University School of Electrical and Information Engineering Tianjin China Nanjing University of Aeronautics and Astronautics The Key Laboratory of Internet of Things and Control Technologies College of Automation Engineering Nanjing China Zhejiang University of Technology College of Information Engineering Zhejiang Hangzhou China

ISBN: (纸本)9798350316155

To avoid the insulation-based fault problem caused by the large slip loss of the brushless doubly-fed machine (BDFM), this paper proposes a dual electrical port slip vector control method that can effectively reduce the slip loss. Firstly, this paper introduces the mathematical model of the BDFM, then introduces the working principle of dual electrical port operation, then designs the slip frequency vector controller according to the rotor field orientation, and at the same time gives the realization of the control system necessary condition. Finally, the control algorithm in this paper is compared with the control algorithm under single electrical port. The results show the advantage of the dual electrical port control method and its robustness when there are deviations in parameters. © 2023 IEEE.

关键词： Vector control (Electric machinery)

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Small-size temperature/high-pressure integrated sensor via flip-chip method

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Microsystems & Nanoengineering 2024年第4期10卷 153-162页

作者： Mimi Huang Xiaoyu Wu Libo Zhao Xiangguang Han Yong Xia Yi Gao Zeyu Cui Cheng Zhang Xiaokai Yang Zhixia Qiao Zhikang Li Feng Han Ping Yang Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi’an Jiaotong UniversityXi’an 710049China Xi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and System Xi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China School of Mechanical Engineering Xi’an Jiaotong University710049 Xi’anChina School of Instrument Science and Technology Xi’an Jiaotong University710049 Xi’anChina Chongqing Key Laboratory of Micro-Nano Systems and Intelligent Sensing Chongqing Academician WorkstationChongqing 2011 Collaborative Innovation Center of Micro/Nano Sensing and Intelligent Ecological Internet of ThingsChongqing Technology and Business UniversityNan’an DistrictChongqing 400067China Xi’an Aerospace Yuanzheng Fluid Control Co.Ltd. Xi’an 710049China

Hydraulic technology with smaller sizes and higher reliability trends,including fault prediction and intelligent control,requires high-performance temperature and pressure-integrated *** designs rely on planar wafer-or chip-level integration,which is limited by pressure range,chip size,and low *** propose a small-size temperature/high-pressure integrated sensor via the flip-chip *** pressure and temperature units are arranged vertically,and the sensing signals of the two units are integrated into one plane through silicon vias and gold–gold bonding,reducing the lateral size and improving the efficiency of signal *** flip-chip technique ensures a reliable electrical connection.A square diaphragm with rounded corners is designed and optimised with simulation to sense high pressure based on the piezoresistive *** temperature sensing unit with a thin-film platinum resistor measures temperature and provides back-end high-precision compensation,which will improve the precision of the pressure *** integrated chip is fabricated by MEMS technology and packaged to fabricate the extremely small integrated *** integrated sensor is characterised,and the pressure sensor exhibits a sensitivity and sensitivity drift of 7.97mV/MPa and−0.19%FS in the range of 0–20 MPa and−40 to 120℃.The linearity,hysteresis,repeatability,accuracy,basic error,and zero-time drift are 0.16%FS,0.04%FS,0.06%FS,0.18%FS,±0.23%FS and 0.04%FS,*** measurement error of the temperature sensor and temperature coefficient of resistance is less than±1°C and 3142.997 ppm/℃,*** integrated sensor has broad applicability in fault diagnosis and safety monitoring of high-end equipment such as automobile detection,industrial equipment,and oil drilling platforms.

关键词： size corners sizes

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control design under attacks of multi-agent switched systems via arbitrary switching

Control design under attacks of multi-agent switched systems...

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2022 Chinese Automation Congress, CAC 2022

作者： Li, Zhanjie Ma, Yajing Nanjing University of Posts and Telecommunications Institute of Advanced Technology for Carbon Neutrality Nanjing China Sichuan Xihua University Provincial Engineering Research Center for New Energy Vehicle Intelligent Control and Simulation Test Technology Chengdu China School of Internet of Things Jiangsu Key Laboratory of Broadband Wireless Communication and Internet of Things Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (纸本)9781665465335

In this paper, the consensus control against attacks for a type of nonlinear multi-agent switched systems under arbitrary switching is studied. The attacks corrupt the information data, which cannot be used for the feedback design. Meanwhile, the switching logic is not allowed to be designed. To tackle the complicated effects, some intermediate variables and adaptive laws are introduced to compensate the uncertainties. By constructing a common Lyapunov function, an adaptive protocol is proposed such that the outputs of the agents achieve consensus against attacks under arbitrary switching. © 2022 IEEE.

关键词： Multi agent systems

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Distributed non‐ideal leader estimation and formation control for multiple non‐holonomic mobile robots

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IET Cyber-Systems and Robotics 2022年第3期4卷 163-174页

作者： Peifen Lu Zhigang Ren Zongze Wu Zhipeng Li Shichao Zhou School of Automation Guangdong Hong Kong Macao Joint Laboratory for Smart Discrete ManufacturingGuangdong University of TechnologyGuangzhouGuangdongChina Key Laboratory of Industrial Internet of Things&Networked Control Ministry of EducationChongqing University of Posts and TelecommunicationsChongqingChina College of Engineering Qufu Normal UniversityQufuShandongChina School of Statistics and Data Science Nanjing Audit UniversityNanjingJiangsuChina

This paper studies a distributed formation problem for non‐holonomic mobile *** of the leader dynamics of the robots as non‐ideal,that is,subject to dis-turbances/unmodelled variables,is the distinguishing feature of this *** issue is resolved by a distributed combined disturbance‐and‐leader estimator,allowing for the distributed reconstruction of the leader's *** estimator needs to detect the leader's information and *** order to reject such disturbance and achieve the formation asymptotically,the control law incorporates the smooth estimator's estimate of the leader ***,the stability of the total distributed formation control algorithm is also examined using the Lyapunov ***,to show the viability of the pro-posed theoretical results,simulations and actual experiments are carried out.

关键词： distributed estimator disturbed leader formation control multiagent system nonholonomic mobile robots

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