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Color liquid crystal grating based color holographic 3D display system with large viewing angle

Light(Science & Applications) 2024年第1期13卷 103-112页

作者： Di Wang Yi-Long Li Fan Chu Nan-Nan Li Zhao-Song Li Sin-Doo Lee Zhong-Quan Nie Chao Liu Qiong-Hua Wang School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China Display Technology Research Center Seoul National UniversityGwanak-ro 1Gwanak-guSeoul 08826Republic of Korea Key Lab of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

Holographic 3D display is highly desirable for numerous applications ranging from medical treatments to military ***,it is challenging to simultaneously achieve large viewing angle and high-fidelity color reconstruction due to the intractable constraints of existing ***,we conceptually propose and experimentally demonstrate a simple and feasible pathway of using a well-designed color liquid crystal grating to overcome the inevitable chromatic aberration and enlarge the holographic viewing angle,thus enabling large-viewing-angle and color holographic 3D *** use of color liquid crystal grating allows performing secondary diffraction modulation on red,green and blue reproduced images simultaneously and extending the viewing angle in the holographic 3D display *** principle,a chromatic aberration-free hologram generation mechanism in combination with the color liquid crystal grating is proposed to pave the way for on such a superior holographic 3D *** proposed system shows a color viewing angle of~50.12°,which is about 7 times that of the traditional system with a single spatial light *** work presents a paradigm for achieving desirable holographic 3D display,and is expected to provide a new way for the wide application of holographic display.

关键词： holographic angle crystal

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A novel cross-scale nanopositioning stage based on dual piezoelectric stick-slip actuation with a shared flexible hinge

A novel cross-scale nanopositioning stage based on dual piez...

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International Conference on Manipulation, Automation and robotics at Small Scales (MARSS)

作者： Siyuan Meng Junhui Zhu Yong Wang Luoning Shi Jia Yu Dongmei Wu Wei Dong Changhai Ru State Key Laboratory of Ro-botics and System Harbin Institute of Technology Harbin China School of Electronic and Infor-mation Engineering Suzhou University of Science and Technology Suzhou China Micro-Nano Automation Institute JITRI Suzhou China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China School of Electronic and Information Engineering Suzhou University of Science and Technology Suzhou China

ISBN: (数字)9798350376807

ISBN: (纸本)9798350376814

This paper presents a novel cross-scale nanopositioning stage that integrates the advantages of piezoelectric stick-slip positioners and piezoelectric scanners, utilizing the concept of macro-micro positioning. Initially, a unique structural design featuring a single flexible hinge shared by a small and a large PZT is proposed to reduce the stage's size effectively, enabling millimeter-scale strokes with nanometer-scale positioning accuracy. Subsequently, the cross-scale motion generation mechanism of the dual piezoelectric stick-slip drive is investigated, leading to the development of a system-level dynamics model for the proposed positioning stages. The mechanism design is further optimized to enhance performance. A prototype is manufactured, and a series of experiments are conducted to evaluate the stage's performance. Results indicate that the proposed positioning stage achieves a maximum motion range of 20 mm and a minimum step length of 70 nm in small piezoceramic macro-motion stepping mode, along with a maximum scanning range of 4.9 μm and a motion resolution of 16 nm in large pie-zoceramic micro-motion scanning mode. Moreover, the compact structure of the stage (30×17×8 mm 3 ) supports a maximum motion speed of 10 mm/s and a maximum load of 2 kg. Experi-mental validation confirms the feasibility of the proposed stage, demonstrating nanometer positioning resolution, high accuracy, high speed, and large travel range. These attributes highlight the significant potential of the proposed stage in various in-situ SEM nanorobotic instrument systems.

关键词： Accuracy Automation Nanopositioning Instruments Dynamics Prototypes Mechanism design

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Time-Dependent Constitutive Behaviors of a Dynamically Crosslinked Glycerogel Governed by Bond Kinetics and Chain Diffusion

SSRN

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SSRN 2024年

作者： Qian, Jin Lin, Ji Mredha, Md. Tariful Islam Wadu, Rumesh Rangana Manimel Shi, Chuanqian Xiao, Rui Jeon, Insu Center for Mechanics Plus under Extreme Environments School of Mechanical Engineering & Mechanics Ningbo University Ningbo315211 China School of Mechanical Engineering Chonnam National University 77 Yongbong-ro Buk-gu Gwangju61186 Korea Republic of State Key Laboratory of Fluid Power & Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Department of Engineering Mechanics Zhejiang University Hangzhou310027 China

Soft materials featuring dynamic networks represent a burgeoning frontier in materials science, offering multifaceted applications spanning soft robotics, biomaterials, and flexible electronics. Unraveling the time-dependent constitutive behavior of these materials, rooted in dynamic networks, stands as a pivotal pursuit for engineering advancements. Herein, we fabricate a tough and extreme-temperature-tolerant glycerogel with a polymer network crosslinked by metal-coordination crosslinkers and conduct a thorough analysis of its intricate mechanical responses across monotonic loading, relaxation, creep, and cyclic tests. We then develop a physically grounded constitutive model integrating the dynamics of crosslinker association/dissociation and polymer chain diffusion, furnishing a holistic framework to elucidate their interplay. We employ a statistical description, using density functions of chains in terms of end-to-end vectors, to characterize network reconfiguration. The evolution of chain density under external load, mediated by crosslinker kinetics and chain diffusion in a viscous medium, leads to intriguing variations in elastic energy and stress responses. Through meticulous experimental validation and numerical simulations, we demonstrate the efficacy of the model in forecasting the mechanical behavior of dynamic polymer networks under diverse loading scenarios, encompassing strain rate effects, stress relaxation, Mullins effect, and self-recovery phenomena. Our findings provide valuable insights into the design and optimization of dynamic network-based materials for diverse applications in biomedical and engineering fields. © 2024, The Authors. All rights reserved.

关键词： Kinetics

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青藏高原植被结构变化反映环境变迁

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Science Bulletin 2023年第17期68卷 1928-1937页

作者：王艳芬薛凯胡容海丁柏阳曾弘李瑞津徐斌庞哲宋小宁李聪佳杜剑卿杨秀春张泽林郝彦宾崔骁勇郭柯高清竹张扬建朱军涛孙建李耀明姜丽丽周华坤罗彩云张振华高庆波陈世龙纪宝明徐兴良陈槐李奇赵亮徐世晓刘雅莉胡林勇武建双杨其恩董世魁贺金生赵新全汪诗平朴世龙于贵瑞傅伯杰 College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory of Tibetan Plateau Earth System Environment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016China Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810001China Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou 256606China College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Key Laboratory of Agri-Informatics Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China School of Grassland Science Beijing Forestry UniversityBeijing 100083China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory for Agro-Environment&Climate Change Ministry of AgricultureBeijing 100081China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China Zoige Peatland and Global Change Research Station Chinese Academy of SciencesHongyuan 62

草地植被结构对于其生产和生态功能至关重要,但大尺度信息严重匮乏.本研究结合多源遥感数据和深度学习,在区域尺度上厘清了青藏高原高寒草地基于群系的植物群落结构空间格局,并比较了其历史变化.过去40年,高寒草甸在高寒草地中的比例从... 详细信息

草地植被结构对于其生产和生态功能至关重要,但大尺度信息严重匮乏.本研究结合多源遥感数据和深度学习,在区域尺度上厘清了青藏高原高寒草地基于群系的植物群落结构空间格局,并比较了其历史变化.过去40年,高寒草甸在高寒草地中的比例从50%上升到69%,反映了变暖变湿的环境变化.此外,高寒草甸和高寒草原中高山嵩草草甸和紫花针茅草原的优势度分别增强到76%和92%.其中,气候因子驱动了紫花针茅草原近些年的分布;高山嵩草草甸近些年的分布则并非完全由气候驱动,人类活动可能起重要作用.本研究首次探索了区域尺度植被结构特征与历史变化,为认识青藏高原草地变化的驱动力及其空间异质性提供了新视角.

关键词：高寒草地植被结构草地植被多源遥感数据深度学习植物群落结构区域尺度高寒草原

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Yolk–shell vanadium pentoxide integrated electrode for high-performance stretchable lithium metal battery

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Journal of Energy Storage 2024年 98卷

作者： Nathan, Muthu Gnana Theresa Yeon, Seon-Young Lee, Jae Seob Jo, Min Su Hwang, Gil Chan Kim, Hong-Il Wu, Fanglin Kim, Guk-Tae Liu, Ying Kim, Jin-Hee Cho, Jung Sang Kim, Jae-Kwang Department of Energy Convergence Engineering Cheongju University 258 Daeseong-ro Chungbuk Cheongju28503 Korea Republic of Department of Engineering Chemistry Chungbuk National University Chungbuk 28644 Korea Republic of Department of Earth System Sciences Yonsei University Seoul03722 Korea Republic of State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Biomedical Laboratory Science College of Health Science Cheongju University Chungbuk Cheongju28503 Korea Republic of Biomedical Research Institute Chungbuk National University Hospital Chungbuk 361-763 28644 Korea Republic of

Vanadium pentoxide (V2O5) stands out as a preferred cathode material for stretchable lithium-ion batteries due to its high specific capacity, robust structural stability, cost-effectiveness, and ease of synthesis. However, its practical application is limited by a low Li+ diffusion coefficient (10−12–10−13 cm2 s−1) and poor electrical conductivity. To address these challenges, we have developed an innovative yolk-shell V2O5 architecture using a facile synthesis method involving spray pyrolysis followed by thermal treatment. This yolk-shell V2O5 is coated with a poly(ethylene oxide) (PEO) electrolyte to enhance ion transport contact areas and flexibility. The yolk-shell V2O5@PEO is then integrated with a PEO-based polymer electrolyte in a thin film configuration, paired with zig-zag truncated lithium metal anodes for stretchable lithium metal batteries. The integrated film demonstrates superior electrochemical performance due to highly reversible Li+ insertion/extraction and enhanced Li ion diffusion. The unique design of the stretchable Li-yolk-shell V2O5@PEO battery achieves an excellent specific discharge capacity of 261 mAh g−1, compared to 158 mAh g−1 for pure V2O5 at 0.1C. Additionally, the stretchable Li-yolk-shell V2O5@PEO cell exhibits a discharge capacity of 250 mAh g−1 under zero-strain conditions and 233.7 mAh g−1 under 40 % strain at 0.1C and 40 °C. Characterization through X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirms the nano-sized morphology and high crystallinity of the yolk-shell V2O5. X-ray photoelectron spectroscopy (XPS) analysis reveals the transformation of yolk-shell V2O5@PEO into α-V2O5, Ε-Li0.5V2O5, δ-LiV2O5, and γ-Li2V2O5 phases during lithium-ion (de)intercalation. This cutting-edge battery design paves the way for the development of high-performance, stretchable, and flexible batteries, ideal for next-generation portable electronic devices. © 2024 Elsevier Ltd

关键词： Scanning electron microscopy

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Recent Advances in Triboelectric Nanogenerators: From Technological Progress to Commercial Applications

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ACS Nano 2023年第12期17卷 11087-11219页

作者： Choi, Dongwhi Lee, Younghoon Lin, Zong-Hong Cho, Sumin Kim, Miso Ao, Chi Kit Soh, Siowling Sohn, Changwan Jeong, Chang Kyu Lee, Jeongwan Lee, Minbaek Lee, Seungah Ryu, Jungho Parashar, Parag Cho, Yujang Ahn, Jaewan Kim, Il-Doo Jiang, Feng Lee, Pooi See Khandelwal, Gaurav Kim, Sang-Jae Kim, Hyun Soo Song, Hyun-Cheol Kim, Minje Nah, Junghyo Kim, Wook Menge, Habtamu Gebeyehu Park, Yong Tae Xu, Wei Hao, Jianhua Park, Hyosik Lee, Ju-Hyuck Lee, Dong-Min Kim, Sang-Woo Park, Ji Young Zhang, Haixia Zi, Yunlong Guo, Ru Cheng, Jia Yang, Ze Xie, Yannan Lee, Sangmin Chung, Jihoon Oh, Il-Kwon Kim, Ji-Seok Cheng, Tinghai Gao, Qi Cheng, Gang Gu, Guangqin Shim, Minseob Jung, Jeehoon Yun, Changwoo Zhang, Chi Liu, Guoxu Chen, Yufeng Kim, Suhan Chen, Xiangyu Hu, Jun Pu, Xiong Guo, Zi Hao Wang, Xudong Chen, Jun Xiao, Xiao Xie, Xing Jarin, Mourin Zhang, Hulin Lai, Ying-Chih He, Tianyiyi Kim, Hakjeong Park, Inkyu Ahn, Junseong Huynh, Nghia Dinh Yang, Ya Wang, Zhong Lin Baik, Jeong Min Choi, Dukhyun Kyung Hee University Gyeonggi Yongin17104 Korea Republic of Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Department of Mechanical Engineering Soft Robotics Research Center Seoul National University Seoul08826 Korea Republic of Department of Mechanical Engineering Gachon University Seongnam13120 Korea Republic of Department of Biomedical Engineering National Taiwan University Taipei10617 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan School of Advanced Materials Science & Engineering Sungkyunkwan University Suwon16419 Korea Republic of Sungkyunkwan University 2066 Seobu-ro Gyeonggi Suwon16419 Korea Republic of Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 117585 Singapore Division of Advanced Materials Engineering Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Department of Physics Inha University 100 Inha-ro Incheon22212 Korea Republic of School of Materials Science & Engineering Yeungnam University Gyeongbuk Gyeongsan38541 Korea Republic of 291 Daehak-ro Daejeon34141 Korea Republic of School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Institute of Flexible Electronics Technology of Tsinghua Zhejiang Jiaxing314000 China Nanomaterials and System Lab Major of Mechatronics Engineering Faculty of Applied Energy System Jeju National University Jeju632-43 Korea Republic of School of Engineering University of Glasgow GlasgowG128QQ United Kingdom Seoul02792 Korea Republic of Department of Physics Inha University Incheon22212 Korea Republic of Suwon16419 Korea Republic of Department of

Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions and save our environment, renewable energy harvesting technologies will serve as a key solution in the near future. Among them, triboelectric nanogenerators (TENGs), which is one of the most promising mechanical energy harvesters by means of contact electrification phenomenon, are explosively developing due to abundant wasting mechanical energy sources and a number of superior advantages in a wide availability and selection of materials, relatively simple device configurations, and low-cost processing. Significant experimental and theoretical efforts have been achieved toward understanding fundamental behaviors and a wide range of demonstrations since its report in 2012. As a result, considerable technological advancement has been exhibited and it advances the timeline of achievement in the proposed roadmap. Now, the technology has reached the stage of prototype development with verification of performance beyond the lab scale environment toward its commercialization. In this review, distinguished authors in the world worked together to summarize the state of the art in theory, materials, devices, systems, circuits, and applications in TENG fields. The great research achievements of researchers in this field around the world over the past decade are expected to play a major role in coming to fruition of unexpectedly accelerated technological advances over the next decade. © 2023 The Authors. Published by American Chemical Society

关键词： Nanogenerators

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Technology roadmap for Flexible Sensors

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ACS NANO 2023年第6期17卷 5211-5295页

作者： Luo, Yifei Abidian, Mohammad Reza Ahn, Jong-Hyun Akinwande, Deji Andrews, Anne M. Antonietti, Markus Bao, Zhenan Berggren, Magnus Berkey, Christopher A. Bettinger, Christopher John Chen, Jun Chen, Peng Cheng, Wenlong Cheng, Xu Choi, Seon-Jin Chortos, Alex Dagdeviren, Canan Dauskardt, Reinhold H. Di, Chong-an Dickey, Michael D. Duan, Xiangfeng Facchetti, Antonio Fan, Zhiyong Fang, Yin Feng, Jianyou Feng, Xue Gao, Huajian Gao, Wei Gong, Xiwen Guo, Chuan Fei Guo, Xiaojun Hartel, Martin C. He, Zihan Ho, John S. Hu, Youfan Huang, Qiyao Huang, Yu Huo, Fengwei Hussain, Muhammad M. Javey, Ali Jeong, Unyong Jiang, Chen Jiang, Xingyu Kang, Jiheong Karnaushenko, Daniil Khademhosseini, Ali Kim, Dae-Hyeong Kim, Il-Doo Kireev, Dmitry Kong, Lingxuan Lee, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Li, Fengyu Li, Jinxing Liang, Cuiyuan Lim, Chwee Teck Lin, Yuanjing Lipomi, Darren J. Liu, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Loh, Xian Jun Lu, Nanshu Lv, Zhisheng Magdassi, Shlomo Malliaras, George G. Matsuhisa, Naoji Nathan, Arokia Niu, Simiao Pan, Jieming Pang, Changhyun Pei, Qibing Peng, Huisheng Qi, Dianpeng Ren, Huaying rogers, John A. rowe, Aaron Schmidt, Oliver G. Sekitani, Tsuyoshi Seo, Dae-Gyo Shen, Guozhen Sheng, Xing Shi, Qiongfeng Someya, Takao Song, Yanlin Stavrinidou, Eleni Su, Meng Sun, Xuemei Takei, Kuniharu Tao, Xiao-Ming Tee, Benjamin C. K. Thean, Aaron Voon-Yew Trung, Tran Quang Wan, Changjin Wang, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Weiss, Paul S. Wen, Hanqi Xu, Sheng Xu, Tailin Yan, Hongping Yan, Xuzhou Yang, Hui Yang, Le Yang, Shuaijian Yin, Lan Yu, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Zamburg, Evgeny Zhang, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhao, Siyuan Zhao, Xuanhe Zheng, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zhou, Tao Zhu, Bowen Zhu, Ming Zhu, rong Zhu, Yangzhi Zhu, Yong Zou, Guijin Chen, Xiaodong 08-03 Innovis Singapore 138634 Republic of Singapore Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore Department of Biomedical Engineering University of Houston Houston Texas 77024 United States School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 United States Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 United States Department of Chemistry and Biochemistry California NanoSystems Institute and Department of Psychiatry and Biobehavioral Sciences Semel Institute for Neuroscience and Human Behavior and Hatos Center for Neuropharmacology University of California Los Angeles Los Angeles California 90095 United States Colloid Chemistry Department Max Planck Institute of Colloids and Interfaces 14476 Potsdam Germany Department of Chemical Engineering Stanford University Stanford California 94305 United States Laboratory of Organic Electronics Department of Science and Technology Campus Norrköping Linköping University 83 Linköping Sweden Wallenberg Initiative Materials Science for Sustainability (WISE) and Wallenberg Wood Science Center (WWSC) SE-100 44 Stockholm Sweden Department of Materials Science and Engineering Stanford University Stanford California 94301 United States Department of Biomedical Engineering and Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States Department of Bioengineering University of California Los Angeles Los Angeles California 90095 United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637457 Singapore Nanobionics Group Department of Chemical and Biological Engineering Monash University Clayton Australia 3800 Monash

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze continued...challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collaborative

关键词： soft materials mechanics engineering flexible electronics conformable sensors bioelectronics human-machine interfaces body area sensor networks technology translation sustainable electronics

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Corrigendum to ‘Design and experimental study of an origami-inspired constant-force mechanism’ [Mechanism and Machine Theory 179 (2023) 105117]

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Mechanism and Machine Theory 2023年 182卷

作者： Shiwei Liu Gaoliang Peng Zhixiong Li Weihua Li Kang Jin Hongzhao Lin State Key Laboratory of Robotics and System Harbin Institute of Technology No. 92 Xidazhi Street Harbin 150001 Heilongjiang Province PR China Yonsei Frontier Lab Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul 03722 Republic of Korea Faculty of Mechanical Engineering Opole University of Technology Opole 45758 Poland School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong Wollongong NSW 2522 Australia

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Corrigendum: provincial-scale assessment of direct air capture to meet China’s climate neutrality goal under limited bioenergy supply (2024 Environ. Res. Lett. 19 114021)

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Environmental Research Letters 2025年第2期20卷 029502-029502页

作者： Hanwoong Kim Yang Qiu Haewon McJeon Andres Clarens Parisa Javadi Can Wang Rui Wang Jiachen Wang Hanying Jiang Andy Miller Ryna Cui Jenna Behrendt Yang Ou Sha Yu Jay Fuhrman Joint Global Change Research Institute University of Maryland and Pacific Northwest National Laboratory College Park MD 20740 United States of America Graduate School of Green Growth and Sustainability (GGGS) Korea Advanced Institute of Science and Technology 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea University of Virginia Department of Civil and Environmental Engineering University of Virginia Charlottesville VA 22904 United States of America State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 People’s Republic of China Department of Earth System Science Ministry of Education Key Laboratory for Earth System Modelling Institute for Global Change Studies Tsinghua University Beijing 100084 People’s Republic of China Center for Global Sustainability School of Public Policy University of Maryland College Park MD United States of America College of Environmental Sciences and Engineering Peking University Beijing People’s Republic of China Institute of Carbon Neutrality Peking University Beijing People’s Republic of China

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A novel dynamic prescribed performance fuzzy-neural backstepping control for PMSM under step load

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Neural networks : the official journal of the International Neural Network Society 2025年 190卷 107627页

作者： Xuechun Hu Yu Xia Zsófia Lendek Jinde Cao Radu-Emil Precup School of Mechanical Engineering Guizhou University Guiyang 550025 China. Electronic address: hu567800@***. State Key Laboratory of Mechanical System and Vibration School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China. Electronic address: rainyx@***. Department of Automation Technical University of Cluj-Napoca Memorandumului 28 400114 Cluj-Napoca Romania. Electronic address: zsofia.lendek@aut.utcluj.ro. School of Mathematics Southeast University Nanjing 211189 China. Electronic address: jdcao@***. Department of Automation and Applied Informatics Politehnica University of Timisoara 300223 Timisoara Romania Center for Fundamental and Advanced Technical Research Romanian Academy - Timisoara Branch 300223 Timisoara Romania. Electronic address: radu.precup@aut.upt.ro.

In order to meet the performance requirements of permanent magnet synchronous motor (PMSM) systems with time-varying model parameters and input constraints under step load, this paper proposes a dynamic prescribed performance fuzzy-neural backstepping control approach. Firstly, a novel finite-time asymmetric dynamic prescribed performance function (FADPPF) is proposed to tackle the issues of exceeding predefined error, control singularity, and system instability that arise in the traditional prescribed performance function under load changes. To address model accuracy degradation and control quality deterioration caused by nonlinear time-varying parameters and input constraints in the PMSM system, a backstepping controller is designed by combining the speed function (SF), fuzzy neural network (FNN), and the proposed FADPPF. The FNN approximates nonlinear uncertain functions in the system model; the SF, as an error amplification mechanism, works together with FADPPF to ensure the transient and steady-state performance of the system. The stability of the devised control strategy is proved using Lyapunov analysis. Finally, simulation results demonstrate the dynamic self-adjusting ability and effectiveness of FADPPF under step load. In addition, the feasibility and superiority of the proposed control scheme are validated.

关键词： Fuzzy neural backstepping control PMSM Prescribed performance function Speed function

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