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Industrial Cyber-Physical Systems (ICPS)

作者： Yongchao Liu Qingzhi Wang Baozeng Fu Institute of Complexity Science School of Automation Qingdao University Qingdao China Shandong Key Laboratory of Industrial Control Technology Qingdao China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing China

In this paper, an adaptive neural network asymptotic tracking control method is presented for autonomous surface vehicles (ASV) with unknown uncertainties. In the control design, a smooth function is integrated into backstepping construction, which can achieve asymptotic convergence. The neural networks are borrowed to approximate the lumped nonlinear functions encompassing the unknown dynamics. It can be proved that the tracking errors of ASV can asymptotically converge to zero and all signals of the ASV closed-loop system are bounded. We offer simulation images to exhibit the validity of the devised asymptotic control method of ASV.

关键词： Adaptation models Backstepping Uncertainty Adaptive systems control design Process control Artificial neural networks

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Optimal Minimum Energy Path Planning of Mobile Robot Based on Improved WOA-GA with Hybrid Strategy for Community-Centric Application

Optimal Minimum Energy Path Planning of Mobile Robot Based o...

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2023 International Conference on Machine Learning and Cybernetics, ICMLC 2023

作者： Du, Jiang Da-Lin, Zhou Gong-Fa, Li Bao-Li, Lu Jun-Tong, Yun Ying, Liu Wuhan University of Science and Technology Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan430081 China School of Computing University of Portsmouth PortsmouthPO1 3HE United Kingdom China Three Gorges University Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance Yichang443002 China Wuhan University of Science and Technology Key Laboratory of Mechanical Transmission and Manufacturing Engineering of Hubei Province Wuhan430081 China Precision Manufacturing Research Institute Wuhan University of Science and Technology Wuhan430081 China Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Research Center for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9798350303780

The path planning of mobile robots is investigated to minimize energy loss in intelligent manufacturing. To achieve optimal energy consumption planning, this paper proposes a hybrid strategy that enhances the whale optimization algorithm (WOA) and the genetic algorithm (GA). The WOA-GA algorithm combines their respective advantages and effectively mitigates premature convergence exhibited by the standard traditional algorithm. To enhance the global and local search capabilities of the standard WOA, we employ adaptive weighting and a Cauchy mutation strategy. Additionally, we introduce an adaptive crossover mutation probability and an elite strategy to mitigate the detrimental effects of the genetic algorithm's evolutionary operation in the late iterations, thereby improving its performance. This paper compares the performance of the standard GA, the standard WOA-GA algorithm, and the enhanced WOA-GA algorithm. The experimental results demonstrate that the enhanced WOA-GA algorithm can achieve optimal energy-efficient path planning using the hybrid strategy. The average energy consumption of the enhanced WOA-GA algorithm can be reduced by 30%, while the maximum energy consumption can be reduced by 47%. The results confirm the effectiveness and feasibility of the proposed method in enhancing the level of green manufacturing. © 2023 IEEE.

关键词： Genetic algorithms

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Global Viv and Local Noise Propagation Analysis of a Mooring Submersible Buoy System

SSRN

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SSRN 2023年

作者： Zhang, Qin Chen, Tingwei Zhang, Xuegang Lv, Shuai Song, Xiancang College of Engineering Ocean University of China Qingdao266100 China Dalian Measurement and Control Technology Research Institute China Shipbuilding Industry Group Co. Ltd. Dalian116013 China

This paper proposes an analysis method/procedure to investigate a 900m MSB system’s global vortex-induced vibration(VIV) and local noise propagation. Firstly, the static attitude of the MSB system is calculated by the lumped mass model. Then, the MSB system’s global VIV motion is simulated by a selected semi-empirical model. Thirdly, extracting the displacement at the hydrophone from the global VIV motion as the moving boundary condition, the k-ω SST-IDDES turbulence model is used for local hydrodynamic simulation. Finally, the Ffowcs Williams and Hawkings(FW-H) method is used to analyse the noise propagation with the hydrophone wall as the sound source. Each step has been verified respectively. The results show that the equipment suspended on the mooring line can suppress the vibration amplitude of the mooring line. Under flow velocity conditions, the vibration frequency will mutate at the position where the equipment exists. For the noise propagation results, the sound pressure will decay slowly with the increase in distance. The sound pressure level(SPL) peak frequency in each condition corresponds to the VIV frequency at the hydrophone. It can be found that the SPL curve shows a trend of expanding first and then shrinking comparing the directivity curves of different flow velocity conditions(0.25~1.5m/s). © 2023, The Authors. All rights reserved.

关键词： Hydrophones

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Semantic Structural and Occlusive Feature Fusion for Pedestrian Detection 18th

Semantic Structural and Occlusive Feature Fusion for Pedestr...

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18th Pacific Rim International Conference on Artificial Intelligence, PRICAI 2021

作者： Wang, Hui Zhang, Yu Ke, Hongchang Wei, Ning Xu, Zhongyu The College of Computer Science and Engineering Changchun University of Technology Changchun130012 China The School of Computer Technology and Engineering Changchun Institute of Technology Changchun130012 China National and Local Joint Engineering Research Center for Intelligent Distribution Network Measurement Organization Control and Safe Operation Technology of National Development and Reform Commission Changchun Institute of Technology Changchun130012 China

ISBN: (纸本)9783030891879

Pedestrian detection under occlusion scenes remains a formidable challenge in computer vision. Recently, anchor-free approach has been raised on the object detection and pedestrian detection field, anchor-free detector Center and Scale Prediction (CSP) has been proposed in pedestrian detection without special measures for occlusion. In this paper, we propose an anchor-free detector named OCSP with power ful occlusion handling ability to existing anchor-free detection network. OCSP integrates prior information into the network to handle occlusion. This high-fusion prior information gives the detector a hint about identifying the structural features of pedestrians. OCSP becomes more robust with the prior information which fusion the semantic head, the visible part, and the size and center body for each pedestrian. The detector enhances the perception of occlusion by predicting the semantic head and visible part. Besides, we design a head branch and add predicting the visible box to achieve a similar result. Experiments show that this fusion of prior information represents a suitable combination. We compare our OCSP with state-of-arts models on the Citypersons dataset, the proposed OCSP detector achieves the state-of-arts result on the CityPersons benchmark. © 2021, Springer Nature Switzerland AG.

关键词： Semantics

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Strain-regulated sensing properties of α-Fe_(2)O_(3) nano-cylinders with atomic carbon layers for ethanol detection

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Journal of Materials Science & technology 2021年第9期68卷 132-139页

作者： Huajing Xiong Jianan Fu Jinyao Li Rashad Ali Hong Wang Yifan Liu Hua Su Yuanxun Li Woon-Ming Lau Nasir Mahmood Chunhong Mu Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Chemistry National Institute of Measurement and Testing Technology of ChinaChengdu 610021China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Jiangxi Guo Chuang Industrial Park Development Co. LtdGanzhou 341000China Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 610054China School of Engineering RMIT University124 La Trobe Street3001 MelbourneVictoriaAustralia National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 611731China

The sensitivity of ethanol sensor is of paramount importance in a variety of areas,including chemical production with ethanol,alcohol testing for driving safety,***,α-Fe_(2)O_(3) nano-cylinders with atomic carbon layers are synthesized,for the first time,through in-situ catalytic chemical vapor deposition combined with hydrothermal techniques for the detection of *** reported α-Fe_(2)O_(3)@C nano-cylinders with double surficial strain effects deliver an ethanol detection sensitivity of 8 times as compared with α-Fe_(2)O_(3) nano-cylinders,10 times higher as compared with its detection sensitivity to ammonia,para-xylene,methanol and *** sensor also exhibits over-14-day operation stability and the minimum detection limit of 10 *** our best knowledge,the performances surpass those of previously reported α-Fe_(2)O_(3).Such attractive performances are attributed to the enhanced charge transfer in α-Fe_(2)O_(3) owing to the double surficial strain effects of α-Fe_(2)O_(3)@C nano-cylinders and the efficient adsorption of ethanol with atomic carbon layers.

关键词： Gas sensor Nano-cylinder Hybrid microstructure Sensitivity Carbon coating

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PCDH-based nonlinear H∞control of VSC-HVDC with wind power integrated

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Journal of control and Decision 2021年第1期8卷 41-49页

作者： Xingyu Lv Bangjun Lei Shumin Fei Foreign language Teaching Center Guizhou Institute of TechnologyGuiyangPeople’s Republic of China Key Laboratory of Power Dig Data of Guizhou Province School of Electrical and Information EngineeringGuizhou Institute of TechnologyGuiyang 550003People’s Republic of China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSchool of AutomationSoutheast UniversityNanjingPeople’s Republic of China

Based on the port-controlled dissipative Hamiltonian(PCDH)system,a novel nonlinear(NN)H∞control is designed for the wind farm side(WFS)voltage source converter(VSC)of VSC-based high-voltage direct current(VSC-HVDC)transmission system connected large wind ***,the uncertain nonlinear dynamical model of WFS VSC in the VSC-HVDC is established by taking external disturbances and parameter variations into ***,the dissipative Hamiltonian structure of the WFS VSC system is constructed by means of variable ***,on the basis of the obtained dissipative Hamiltonian structure,a NN H∞control is put ***,the simulation results show that the proposed NN H∞control gains the advantage over the interconnection and damping assignment passivity-based(IDA-PB)control.

关键词： VSC-HVDC large wind farm Hamiltonian function method nonlinear H∞control

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Light Output Efficiency of Surface-Mount Lamp Beads Based on New Solid–Liquid UV Encapsulation 21

Light Output Efficiency of Surface-Mount Lamp Beads Based on...

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21st China International Forum on Solid State Lighting and 10th International Forum on Wide Bandgap Semiconductors, SSLCHINA: IFWS 2024

作者： Wei, Wei Liuming, Li Chunpeng, Gu Lei, Chen Jinde, Song Zhenghao, Xia Haozhong, Guo Xinxing, Wang Zenglei, Li Xiaoting, Wang Mingxue, Zou Chenyang, Li Jun, Zou Zhizhong, Chen Peng, Wu Yitao, Liao Guoyi, Zhang Jiangsu Intelligent Optoelectronic Device And Measurement And Control Engineering Research Center Yancheng Normal University Jiangsu Province Yancheng City224007 China Xuyu Optoelectronics Co. Ltd Shenzhen518101 China College of Physics Peking University Haidian District Beijing100091 China Shanghai Institute of Technology Shanghai201418 China Xuzhou Liyu Advanced Technology Co. Ltd China Yancheng Believe Technology Co. Ltd Yancheng224000 China Greatshine Semiconductor Technology Co.LTD. Zhongshan528400 China Semiconductor Research Center Hon Hai Research Institute New Taipei city236 China Dongguan Institute of Opto-electronics Peking University Dongguan523808 China Beijing Perfectlight Technology Co. LTD Fengtai District Beijing100006 China

ISBN: (数字)9798331541149

ISBN: (纸本)9798331541149

To address the problem of low efficiency of AlGaN-based UV LED chips, this study developed a type of solid–liquid packaged UV LED chip and analyzed its light output efficiency under different parameters. The light output efficiency of UV LED chips with and without solid–liquid encapsulation were analyzed using different reflective materials inside the chips. It was found that Au, Ag, and total-absorption reflective materials could not improve the light-output efficiency of UV LED liquid packaging. In addition, Al reflective materials and total reflection photonic crystals can improve the light output efficiency of UV LED liquid packaging, with the highest efficiency increase reaching over 74%. The light output efficiencies of liquid packaging with quartz cover sheets of different thicknesses were analyzed;the results revealed that the thinner the quartz cover sheet, the higher the efficiency;Under the same conditions, the efficiency improvement of UV LED surface-mount beads is not significant with different thicknesses of quartz cover sheets;Under the same thickness of quartz cover, Al reflective material and total reflection photonic crystal can improve the light output efficiency of UV LED liquid packaging. ©2024 IEEE.

关键词： Photonic crystals

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Finite-time robust control for transformerless H-bridge cascaded STATCOM with star configuration

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Journal of control and Decision 2021年第2期8卷 106-115页

作者： Xingyu Lv Bangjun Lei Shumin Fei Foreign Language Teaching Center Guizhou Institute of TechnologyGuiyangPeople’s Republic of China Key Laboratory of Power Dig Data of Guizhou Province School of Electrical and Information EngineeringGuizhou Institute of TechnologyGuiyang 550003People’s Republic of China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSchool of AutomationSoutheast UniversityNanjingPeople’s Republic of China

This article presents a finite-time robust control(FTRC)of a transformerless STATCOM based on a cascaded multilevel H-bridge converter(CMHC)with star *** FTRC is first proposed for the current loop control of a CMHC-based transformerless STATCOM by using the finite time robust control *** the parameters,perturbations and external disturbances into account and using coordinate transformation method,the nonlinear dynamic model of the CMHC-based transformerless STATCOM is transformed into a standard nonlinear port-controlled dissipative Hamiltonian(PCDH)*** on the PCDH structure,an FTRC is designed for the CMHC-based transformerless STATCOM to improve the transient stability and oscillation damping of power ***,the simulation results demonstrate that the FTRC has better dynamic performance and strong robustness in comparison with the passivity-based control of the CMHC-based transformerless STATCOM.

关键词： Cascaded H-bridge converter transformerless STATCOM finite time robust control oscillations damping transient stability

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Structural reliability analysis based on improved parallel sampling algorithm

Structural reliability analysis based on improved parallel s...

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10th International Symposium on Test Automation & Instrumentation (ISTAI 2024)

作者： Yifan Yu Liyong Wang Ximing Zhang College of Mechanical & Energy Engineering Beijing University of Technology Beijing People's Republic of China Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing People's Republic of China China North Vehicle Research Institute Beijing People's Republic of China

ISBN: (数字)9781837241910

Aiming at the problem of computational inefficiency of traditional reliability analysis methods when dealing with large-scale structural systems, this paper proposes a reliability analysis method that improves the parallel sample algorithm. The method adopts the Kriging model to fit the performance function and introduces the mean square error to evaluate the uncertainty of the sample points; In addition, the positional relationship between the sample points is taken into consideration to avoid overfitting the model; To improve the efficiency of the model fitting, the sample points are divided into multiple clusters using the Mini batch k-means clustering algorithm in parallel computation. Finally, it is verified by multiple random variable cases that the method can significantly improve the computational efficiency while guaranteeing the relative error compared with other reliability analysis methods.

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Research on the Influence of Non-Conductor on the Weight Function of Electromagnetic Flowmeter

Research on the Influence of Non-Conductor on the Weight Fun...

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2021 Asia-Pacific Conference on Image Processing, Electronics and Computers, IPEC 2021

作者： Li, Xuejing Sun, Lijun Shanghai Institute of Measurement and Testing Technology Shanghai201203 China Shanghai Key Laboratory of On-line Testing and Control Technology Shanghai201203 China School of Electrical and Information Engineering Tianjin University Tianjin300072 China

The demand for multiphase flow measurement is widespread in petrochemical and other fields. Due to its small size, easy maintenance, and no moving parts, electromagnetic flowmeters are widely used in single fluid measurement. With the increasing application of traditional electromagnetic flowmeters in petrochemical and other fields, the problems of traditional electromagnetic flowmeters in multiphase flow measurement applications have been discovered. How to optimize the structure of the electromagnetic flowmeter and how to improve the measurement accuracy has become a new research focus. On the basis of a large number of literature studies, this research is based on the finite element method, and systematically studies the influence of multiphase flow on the weight function of electromagnetic flowmeters. Firstly, modeling the existence of non-conductive objects in the electromagnetic flowmeter. Secondly, analyze the weight function characteristics of the non-conductive objects on the electromagnetic flowmeter from two angles of different radii and different positions. The conclusions of this study can provide a certain reference basis for the electromagnetic flowmeter in the measurement of multiphase flow. © Published under licence by IOP Publishing Ltd.

关键词： Petrochemicals

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