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International Conference on system Science and engineering (ICSSE)

作者： Nguyen Duc Thinh Duong Ngoc Quan Nguyen Tan Tien Do Xuan Phu Department of Electrical Engineering and Information Technology Vietnamese-German University Binh Duong Vietnam Institute of Engineering HUTECH University of Technology Ho Chi Minh city Vietnam National Key Laboratory of Digital Control and System Engineering Ho Chi Minh University of Technology Ho Chi Minh city Vietnam MediRobotic Lab. Vietnamese-German University Binh Duong Vietnam

The main goal of this paper studies modeling of a direct current coaxial motor (DCCM) and testing the main parameters of DCCM on the experimental model. The DCCM contains two rotors named inner runner and outer runner. The inner runner and the outer runner rotate in opposite directions to each other. The shaft of the inner runner and the shaft of the outer runner are coincident and inserted on two separate bearings. To prove this idea, the mathematic model is achieved by a combination of a mathematic model of DC motor and mathematic model of single phase coaxial motor. Simulation result of the mathematic model in Matlab shows the truth of the hypothesis of the design. The result of testing DCCM of the experimental model is fit to the result of simulation of DCCM in Matlab. Consequently, the DCCM can substitute for other kinds of propellers especially in marine applications.

关键词： DC motors Mathematical model Shafts Torque measurement Induction motors Torque

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A fundamental theorem for eco-environmental surface modelling and its applications

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Science China Earth Sciences 2020年第8期63卷 1092-1112页

作者： Tianxiang YUE Na ZHAO Yu LIU Yifu WANG Bin ZHANG Zhengping DU Zemeng FAN Wenjiao SHI Chuanfa CHEN Mingwei ZHAO Dunjiang SONG Shihai WANG Yinjun SONG Changqing YAN Qiquan LI Xiaofang SUN Lili ZHANG Yongzhong TIAN Wei WANG Ying’an WANG Shengnan MA Hongsheng HUANG Yimin LU Qing WANG Chenliang WANG Yuzhu WANG Ming LU Wei ZHOU Yi LIU Xiaozhe YIN Zong WANG Zhengyi BAO Miaomiao ZHAO Yapeng ZHAO Yimeng JIAO Ufra NASEER Bin FAN Saibo LI Yang YANG John PWILSON State Key L aboratory of Resources and Environment Information System Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China College of Geomatics Shandong University of Science and TechnologyQingdao 266590China College of Forestry Beijing Forestry UniversityBeijing 100083China School of Land and Resources China West Normal UniversityNanchong 637002China College of Geographical Information and Tourism Chuzhou UniversityChuzhou 239000China Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China Department of Information Engineering Shandong University of Science and TechnologyTai'an 271019China College of Resources Sichuan Agricultural UniversityChengdu 611130China College of Geography and Tourism Qufu Normal UniversityRizhao 276828China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100101China School of Geographical Science Southwest UniversityChongqing 400715China National Disaster Reduction Center of China Ministry of Emergency ManagementBeijing 100721China Department for Population Data China Population and Development Research CenterBeijing 100081China Department for Industrial Standard China Standardization AdministrationBeijing 100088China The Academy of Digital China Fuzhou UniversityFuzhou 350002China National Institute of Environmental Health Chinese Center for Disease Control and PreventionBeijing 100021China School of Information Engineering China University of GeoscienceBeijing 100083China Qian Xuesen Laboratory of Space Technology Beijing 100094China College of Architecture and Urban Planning Chongqing Jiaotong UniversityChongqing 400074China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing

We propose a fundamental theorem for eco-environmental surface modelling(FTEEM) in order to apply it into the fields of ecology and environmental science more easily after the fundamental theorem for Earth’s surface system modeling(FTESM). The Beijing-Tianjin-Hebei(BTH) region is taken as a case area to conduct empirical studies of algorithms for spatial upscaling, spatial downscaling, spatial interpolation, data fusion and model-data assimilation, which are based on high accuracy surface modelling(HASM), corresponding with corollaries of FTEEM. The case studies demonstrate how eco-environmental surface modelling is substantially improved when both extrinsic and intrinsic information are used along with an appropriate method of HASM. Compared with classic algorithms, the HASM-based algorithm for spatial upscaling reduced the root-meansquare error of the BTH elevation surface by 9 m. The HASM-based algorithm for spatial downscaling reduced the relative error of future scenarios of annual mean temperature by 16%. The HASM-based algorithm for spatial interpolation reduced the relative error of change trend of annual mean precipitation by 0.2%. The HASM-based algorithm for data fusion reduced the relative error of change trend of annual mean temperature by 70%. The HASM-based algorithm for model-data assimilation reduced the relative error of carbon stocks by 40%. We propose five theoretical challenges and three application problems of HASM that need to be addressed to improve FTEEM.

关键词： HASM FTEEM Spatial upscaling Spatial downscaling Spatial interpolation Data fusion Model-data assimilation Model coupling

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Advanced control Strategy of Dynamic Voltage Restorers for Distribution system Using Sliding Mode control Input-Output Feedback Linearization 4th

Advanced Control Strategy of Dynamic Voltage Restorers for D...

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4th International Conference on Advanced engineering Theory and Applications, AETA 2017

作者： Van, Tan Luong Nguyen, Ngoc Minh Doan Toi, Le Thanh Trang, Tran Thanh Faculty of Electrical and Electronics Engineering Ho Chi Minh City University of Food Industry 140 Le Trong Tan Ho Chi Minh City Viet Nam Faculty of Electronics and Telecommunication Engineering Sai Gon University 273 An Duong Vuong Ho Chi Minh City Viet Nam National Key Laboratory of Digital Control and System Engineering Ho Chi Minh City University of Technology Vietnam National University Ho Chi Minh City 268 Ly Thuong Kiet Ho Chi Minh City Viet Nam

ISBN: (纸本)9783319698137

In this paper, a nonlinear control scheme for dynamic voltage restorer (DVR) under grid voltage sags and nonlinear loads is proposed to mitigate the voltage disturbances for loads. First, the nonlinear model of the system consisting of LC filter based on a feedback linearization technique is obtained in the d-q synchronous reference frame. Then, the controller design of the linearized model is performed by employing the sliding mode control, where the load voltages are kept constant by controlling the d-q axis components of the DVR output voltages. With this scheme, the power quality is significantly improved, compared with the traditional methods with the PI controller under grid voltage sags and nonlinear loads. Also, the system cost and power loss of the proposed DVR is significantly minimized thanks to the use of a smaller number of power switches (four-switch three-phase inverter) with a lower rating voltage without degrading the compensation performance of the DVR. Simulation studies are performed to verify the validity of the proposed method. © Springer International Publishing AG 2018.

关键词： Sliding mode control

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Task-space cooperative tracking control of multi-robot systems with unknown parameters and time delays

Task-space cooperative tracking control of multi-robot syste...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Xinwu Liang Hesheng Wang Yun-Hui Liu Weidong Chen Le Xie The School of Aeronautics and Astronautics Shanghai Jiao Tong University Shanghai China Department of Automation Key Laboratory of System Control and Information Processing Shanghai China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong China National Digital Manufacturing Technology Center Shanghai Jiao Tong University Shanghai China

In this paper, the task-space cooperative tracking control problem of multi-robot systems on strongly connected digraphs is studied. To solve such synchronization problem, a novel adaptive control approach is proposed by introducing task-space synchronization errors between neighboring robotic systems into the task-space reference velocity/acceleration. To cope with unknown kinematic and dynamic parameters, adaptive laws are developed without explicitly incorporating synchronization terms. Lyapunov stability theory is used to rigorously prove asymptotical convergence of the task-space synchronization and tracking errors by fully considering the time delays. Finally, simulation results are given to illustrate the performance of the proposed task-space cooperative tracking control approach.

关键词： Task analysis Robot kinematics Kinematics Multi-robot systems Synchronization Aerospace electronics

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Design and manufacture of supporting device for detection of dental caries using fluorescence technique 3

Design and manufacture of supporting device for detection of...

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3rd International Conference on Biomedical engineering, BME-HUST 2016

作者： Mien, Pham Thi Hai Khanh, Nguyen Duy Hao, Nguyen Tan Vy, Huynh Thi Hoang Vy, Duong Ngoc Khanh Van Tien, Tran Linh, Huynh Quang National Key Laboratory of Digital Control and System Engineering HCMUT VNU-HCM Viet Nam Ho Chi Minh City University of Technology VNU-HCM Viet Nam

ISBN: (纸本)9781509010974

Dental caries and dental disease are one of the prevalent chronic diseases of people around the world in general and in Vietnam in particular. The detection of carious lesions has been primarily a visual process, based principally on clinical-tactile inspection, and radiographic examination. However, a major shortcoming of clinical-tactile inspection is very limited for detecting dental caries in the early stages, while X-ray based methods can cause damage to cells in the body, which in turn can increase the risk of developing cancer. Researchers are developing tools that are sensitive and specific enough for the current presentation of caries using fluorescence imaging techniques. The aim of this study was to design a dental camera based on the fluorescence technique for detection of dental caries and to apply this device in the analysis and diagnosis of different types of caries. Using 380-nm light for excitation, the obtained fluorescence images of carious teeth were different from of sound teeth due to the presence of bacteria Streptococcus mutans producing metabolites called porphyrins. The sound teeth showed the blue fluorescence while the carious regions illuminated the red light. Based on the fluorescence color, dental caries can be discovered even in the early stages. © 2016 IEEE.

关键词： Fluorescence imaging

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The point-array coupling algorithm in 3D scanning machine by laser ray

The point-array coupling algorithm in 3D scanning machine by...

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International Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014

作者： Lam, Phan Huynh Nam, Nguyen Thanh Van Duy, Pham National Key Laboratory of Digital Control and System Engineering University of Technology VNU-HCM Australia

ISBN: (纸本)9783038354956

This paper presents the "Data arrays of the scanning sides coupling by laser" algorithm. This algorithm will find down the duplicate arrays by minima squaring method and couple the arrays. The coupling method will make the 3D scanning machine is more flexible and exactly. © (2015) Trans Tech Publications, Switzerland.

关键词： Scanning

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The data combining method and the forming control algorithm from the 3D scanning machine and processing in the sls machine

The data combining method and the forming control algorithm ...

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International Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014

作者： Lam, Phan Huynh Nam, Nguyen Thanh National Key Laboratory of Digital Control and System Engineering University of Technology VNU-HCM Australia

ISBN: (纸本)9783038354956

This paper presents the data structure combining from 3D laser scanners direction, for processing rapid prototyping by SLS machine. Formed data will have special structure for combining with the rapid prototyping machine and processing will be more directly and easily. control algorithm automatically identifies the images from the scanning data. © (2015) Trans Tech Publications, Switzerland.

关键词： Rapid prototyping

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Variable eccentric distance-based tool path generation for orthogonal turn-milling

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Frontiers of Mechanical engineering 2015年第4期10卷 352-366页

作者： Fangyu PENG Wei WANG Rong YAN Xianyin DUAN Bin LI State Key Laboratory of Digital Manufacturing Equipment andTechnology School of Mechanical Science and Engineering HuazhongUniversity of Science and Technology Wuhan 430074 China National Numerical Control System Engineering Research Center Huazhong University of Science and Technology Wuhan 430074 China

This study proposes an algorithm for max- imizing strip width in orthogonal tum-miUing based on variable eccentric distance. The machining error model is first established based on the local cutting profile at the contact line. The influencing factors of the strip width are then investigated to analyze their features and determine an optimizing strategy. The optimized model for maximum machining strip width is formulated by adopting a variable eccentric distance. Hausdorff distance and Fr6chet distance are introduced in this study to implement the constraint function of the machining error in the optimized model. The computing procedure is subsequently provided. Simulations and experiments have been conducted to verify the effectiveness of the proposed algorithm.

关键词： orthogonal turn-milling variable eccentricdistance local cutting profile machining strip-widthmaximization

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A comparative study on D converter based on control schemes of maximum extracted power

A comparative study on D converter based on control schemes ...

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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： Ahmad El Khateb M.N. Uddin N. A. Rahim Barry W. Williams Automatic Control and Human-Machine Systems LAMIH UMR/CNRS Valenciennes France Electronic Engineering Department Tsinghua University Tsinghua National Laboratory for Information Science and Technology (TNList) Beijing P. R. China Shenzhen City Key Laboratory of Digital TV System Valeo Powertrain Systems Amiens France National Engineering Lab. for DTV(Beijing) Beijing P. R. China

ISBN: (纸本)9781479983988

This paper presents analysis and control of D converter, which has continuous input and output current to obtain maximum power transfer from a photovoltaic (PV) system. Examining the maximum power involves optimization and control techniques that ensure maximum power extraction enhancement. Traditional converters have rather high input ripple current that originates considerable loss of power extraction when linked to photovoltaic panels. Operating with zero input ripple current enlarges the power obtained from the PV panel without employing electrolytic capacitor. Experiment and simulation of the converter performance support and extol the system concept and establish a balanced view among several types of used controllers as well.

关键词： Inverters Capacitors Photovoltaic systems Radiation effects control systems Fuel cells

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The 5th International Conference on Biomedical engineering and Biotechnology (ICBEB 2016) Abstracts

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BMC MEDICAL IMAGING 2016年第SUPPL 1期16卷 65-65页

作者： [Anonymous] Department of MRI Shandong Medical Imaging Research Institute Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China Department of Interventional Radiology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China College of Information Science and Technology Engr. Research Center of Digitized Textile & Fashion Tech. for Ministry of Education Donghua University Shanghai 201620 China Intelligent multimedia information processing Lab College of Software Northeastern University Shenyang Liaoning Province 110004 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China School of Computer Science and Technology Nanjing Normal University Nanjing China Department of Electrical Engineering The City College of New York CUNY New York USA Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing China School of Electronic Science and Engineering Nanjing University Nanjing Jiangsu 210046 China College of Engineering Nanyang Technological University Singapore 639798 Singapore School of Electronic Information Shanghai Dianji University Shanghai China School of Natural Sciences and Mathematics Shepherd University Shepherdstown WV 25443 USA Davis College of Agriculture Natural Resources and Design West Virginia University Morgantown WV 26505 USA State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China College of Agricultural and Life Sciences University of Florida Gainesville FL 32611 USA Courant Institute of Mathematical Sciences New York University New York NY 10012 USA Translational Imaging Division & MRI Unit Columbia University and New York State Psychiatric Institute New York NY 10032 USA Guangxi Key Laboratory of Manufacturing System & Adv

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