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Investigation on Flexible Interconnected Device Based on Multi-Terminal SOP

Investigation on Flexible Interconnected Device Based on Mul...

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Chinese Automation Congress (CAC)

作者： Jian Zhao Yang Zhao Ming Wang Hui Hui Jian Yu Ming Gao Liming Yang Zhiming Lan Chengsheng Wang State Grid Zhejiang Yuyao Power Supply Co. Ltd. Yuyao China China Electric Power Research Institute Beijing China Automation Research and Design Institute of Metallurgical industry Co. Ltd. Beijing China National Key Laboratory of Metallurgical Intelligent Manufacturing System Beijing China

The Application of flexible interconnection technology is an effective method to realize dynamic capacity expansion and rapid transmission of power restoration. Aiming to realize flexible close-loop operation of urban distribution network, the flexible interconnected device based on multi-terminal soft open point (SOP) is investigated in this paper. A four-terminal SOP topology scheme is designed, and the three-phase two-level voltage source converter (VSC) is adopted as the key equipment. One converter adopts DC voltage close loop control to stabilize DC voltage as master converter, the other three converters adopt power control as slave converters. A hierarchical control strategy based on different time scales is proposed in this paper. It is divided to local control layer, centralized control layer and dispatching layer of distribution network. A simulation model of four terminal SOP topology is built to analyze its normal operation performance. The simulation result verifies the feasibility of the flexible interconnected device proposed in this paper.

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Feasibility study of lightweight asphalt concrete in large flexibility steel bridge deck pavement 6

Feasibility study of lightweight asphalt concrete in large f...

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6th Chinese-European Workshop on Functional Pavement design, CEW 2020

作者： Zhang, C.C. Chen, L.L. Jiang, C.L. Liu, G. Key Laboratory of Safety and Risk Management on Transport Infrastructures Ministry of Transport Southeast University Jiangsu Nanjing China China Iconic Technology Company Limited Hefei China Intelligent Transportation System Research Center Southeast University Jiangsu Nanjing China Chongqing Municipal Design and Research Institute Chongqing China

ISBN: (纸本)9780367726102

This paper presents a feasibility study of lightweight asphalt concrete in large flexibility steel bridge deck pavement (SBDP). Firstly, considering effect of global bridge structure, the most critical response of large flexibility steel bridge was simulated through multiscale analysis. Then, lightweight epoxy asphalt concrete was designed by replacing part of the basalt aggregate with ceramsite. After that, the performance of the designed lightweight asphalt concrete were tested to find whether it can meet the requirements of the large flexibility SBDP. Results show that splitting tensile strength of lightweight epoxy asphalt concrete with different ceramsite mixed ratios can meet the requirements. Meanwhile, temperature stability and water stability can meet the requirements of specifications for epoxy asphalt concrete. Based on the performance of lightweight epoxy asphalt concrete with different ceramsite addition, lightweight epoxy asphalt concrete with 40% (mass percentage) ceramsite addition is recommended as material of the large flexibility SBDP. Nearly 1/4 of the mass can be saved compared to that of normal design. © 2021 Taylor & Francis Group, London,

关键词： Tensile strength

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Non-contact Physiological Parameters Detection Based on MTCNN and EVM 5th

Non-contact Physiological Parameters Detection Based on MTCN...

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5th International Conference on Cognitive systems and Signal Processing, ICCSIP 2020

作者： Zhao, Jinfa Zhang, Wenchang Chai, Rongxuan Wu, Hang Chen, Wei Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Tianjin University of Technology Tianjin300384 China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin China Institute of Medical Support Technology Academy of Military Sciences of Chinese PLA Tianjin China

ISBN: (纸本)9789811623356

Non-contact physiological parameters detection has become an important but challenging task. This paper proposes a novel framework for Non-contact physiological parameters detection, which is based on MTCNN (Multi-task convolutional neural network) and EVM (Eulerian Video Magnification). The MTCNN is applied to compensate negative effects of the pseudo motion for improving the efficiency of face detection. The Laplacian pyramid of EVM is added to our framework to perform motion amplification to achieve simultaneous extraction of heart rate and respiration rate, which improves the accuracy of non-contact physiological parameter detection. Then we use FFT to analyze the relevant frequency bands in time domain and calculate the heart rate and breathing rate. In order to improve efficiency, GPU acceleration is implemented under the TensorRT framework. The experimental results based on data sets DUSS (detection under slight shaking) and DUO (detection under occlusion) show the effectiveness of this method. The average error of the heart rate and respiration rate are −0.1 and 0.6, respectively. Our method achieves comparable performance to finger clip oximeter with a good consistency, even in the case of wearing a mask. © 2021, Springer Nature Singapore Pte Ltd.

关键词： Efficiency

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An accurate stop control method of high-speed rolling machine for automobile production line using laser ranging and two positon close loop

An accurate stop control method of high-speed rolling machin...

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2020 International Conference on Applied Mechanics and Mechanical Engineering, ICAMME 2020

作者： Qiao, Zhifeng Ge, Weimin Zhang, Haikang Wei, Huiyong Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin300384 China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology China NO.591Changjiang Road Nankai DistrictTianjin China

The high-speed rolling machine is a key equipment in the automatic production line of automobile body-in-white welding. This article focuses on analyzing a method for accurately stopping the high-speed rolling machine using laser distance measurement. Firstly, through the analysis of the movement process, the calculation method of the length of each period in the 7-stage S-type acceleration and deceleration in the movement of the high-speed rolling machine is given;secondly, the system control theory model of the measurement and control system is established to analyze the dual-position closed-loop strategy The method of realizing the accurate stopping of the high-speed rolling machine;finally, the accurate stopping control method of the high-speed rolling machine proposed in this paper was verified by building an experimental system and developing the corresponding control program. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Speed

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Optimization of experiment teaching in the course of mechanical principle 3

Optimization of experiment teaching in the course of mechani...

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3rd International Conference on Education Technology Management, ICETM 2020

作者： Hao, Pujun Liu, Jingna Ma, Wenpeng Wu, Ruiqin Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin300384 China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology China Tianjin Key LABORATORY for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (纸本)9781450388757

Based on experience of former teaching reformation and philosophy of "Emerging Engineering Education", an experimental teaching reformation program that includes restructured knowledge system, modularization of experimental teaching process and diversified evaluation system is proposed. It is found that students have deeper and comprehensive understanding on knowledge and more enthusiasm in experimental process. Finally students have definite self-cognition about their division of labor in teamwork. Through gathering statistics, the effectiveness of reformation program is verified and this program can enrich practical experience of experimental teaching reformation. © 2020 ACM.

关键词： Optimization

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Prediction model of bone drilling temperature based on heat source method in surgical rehabilitation 4

Prediction model of bone drilling temperature based on heat ...

引用

4th CIRP Conference on Biomanufacturing, CIRP-BioM 2019

作者： Hu, Yahui Yan, Zhiqiang Li, Xiangjun Zhang, Chunqiu Zheng, Qingchun Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjing University of Technology Tianjin China School of Mechanical Engineering Tianjin University of Technology Tianjin China

In order to feedback the cutting temperature in real time during the operation with the surgical robot, this study established a temperature prediction model to analyze the temperature distribution of the cortex. In this work, a three-dimensional governing equation for heat transfer of bone tissue during drilling is proposed, and the heat transfer of cortical bone is evaluated by a reverse heat transfer method. The prediction model was validated by experimental methods and the heat affected zone (HAZ) of cortical bone was analyzed. The results show that the prediction results are in good agreement with the relevant experimental results. HAZ increases with increasing rate of penetration;the closer the bone hole is, the earlier the temperature rises;and the temperature at which the cortical bone is difficult to measure (radial distance x © 2020 The Authors.

关键词： Temperature distribution

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Ontology Modelling of Smart Product-Service system Components towards Mass Personalization

Ontology Modelling of Smart Product-Service System Component...

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IEEE International Conference on Industrial Engineering and Engineering Management

作者： Lucheng Chen Guojun Sheng Chenggang Qin Chao Wang Alexander T.Y Wu Ayala Nuertai Tongtong Zhou Xinguo Ming SJTUSME-COSMOPlat Joint Research Center for New Generation Industrial Intelligent Technology School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China COSMOPlat Institute of Industrial Intelligence (Qingdao) Co. Ltd Shandong Qingdao China State Key Laboratory of Massive Personalized Customization System and Technology Shandong China School of Design Shanghai Jiao Tong University Shanghai China China

ISBN: (数字)9798350386097

ISBN: (纸本)9798350386103

Customer products have become increasingly driven by mass personalization as industries are shifting to knowledge-driven user-centric design approaches such as Smart Product-Service systems (Smart PSS) to better meet expectations and remain competitive. However current user-centric design methods lack a semantic framework that properly models the components of a Smart PSS, leading to a lack in the usefulness of the knowledge generated from user research. This paper aims to create an ontological model that defines the components of a Smart PSS and their relationships to help enterprises better support dynamic personalization requirements. A case-study of electric vehicles is then presented to explore the usage of the ontologybased knowledge model on a Smart PSS.

关键词： Industries Reviews Engineering management User-generated content Semantics Ontologies Industrial engineering Electric vehicles User experience Vehicle dynamics

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design and Experimental Evaluation of a Hexapod Mobile Robot with C-Shaped Legs

Design and Experimental Evaluation of a Hexapod Mobile Robot...

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International Conference on Advanced Robotics and Mechatronics (ICARM)

作者： Yujie Wu Dangchao Li Xia Dong Xin Wang Chunli Zheng Aibin Zhu Zheng Zhang Xu Zhou Yulin Zhang Shaanxi Key Laboratory of Intelligent Robots Institute of Robotics & Intelligent Systems Xi'an Jiaotong University Xi'an China Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi'an China School of Construction Machinery Chang'an University Xi'an China Xi'an Jiaotong University Xi'an China School of Energy and Power Engineering Xi'an Jiaotong University Xi'an China School of Mechanical Engineering Northwestern Polytechnical University Xi'an Taiyuan Research Institute of China Coal Technology & Engineering Group Co. Ltd Taiyuan China

Drawing on extant literature on hexapod robots, we present a novel obstacle-crossing hexapod robot that can adapt to multiple terrains. We designed the robot's entire mechanical structure, established a mathematical model for the robot leg, deduced the kinematic equation of the leg, and determined the relationship between the robot's motion speed and the motor angle. Through force analysis of the C-shaped leg, we obtained the function between motor output torque and motion phase. Subsequently, we constructed the physical hexapod robot and conducted performance testing. Our experimental results demonstrate that the hexapod robot can move at a speed of 0.5 m/s and successfully cross a 10 cm obstacle. The robot exhibits excellent movement performance and satisfies the functional requirements. Overall, our design offers a promising approach for developing hexapod robots that can navigate a variety of terrains.

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Analyzing Influence Factors of Blockchain Technology in Prognostics and Health Management Based on Spherical Fuzzy DEMATEL Method and Technology Adoption Theory

Analyzing Influence Factors of Blockchain Technology in Prog...

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IEEE International Conference on Industrial Engineering and Engineering Management

作者： Zhengwei Hai Xiangxiu Meng Guo Hui XiaoPing Lu Tongtong Zhou Xinguo Ming SJTUSME-COSMOPlat Joint Research Center for New Generation Industrial Intelligent Technology School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China COSMOPlat Institute of Industrial Intelligence (Qingdao) Co. Ltd Shandong Qingdao China State Key Laboratory of Massive Personalized Customization System and Technology Shandong China School of Design Shanghai Jiao Tong University Shanghai China China

ISBN: (数字)9798350386097

ISBN: (纸本)9798350386103

Prognostics and health management (PHM) aims to reduce sudden failures during system operation, thereby improving system performance and protecting personal safety from harmful condition. Nonetheless, implementation of PHM still faces many difficulties related to security, privacy, and trustiness issues. Blockchain, an emerging technology, has great potential to resolve these problems. Adopting blockchain in PHM is a challenging task and a comprehensive analysis is required before jumping into innovation. However, scientific surveys pertaining to the topic are still scarce. In this article, a systematical exploration of the potential and influence factor of blockchain adoption in PHM is presented. combined technology adoption theory (TAT) is proposed as theoretical foundation for identifying influence factors of blockchain adoption in PHM. Twenty-one factors at both individual-level and firm-level are captured. Thirdly, a dual-ideal distance based spherical fuzzy DEMATEL is introduced to evaluate the interrelationships and importance of the influence factors with considering vagueness and hesitancy of experts’ judgements. Aiming to demonstrate the feasibility and effectiveness, a case study and several comparative analyses are performed finally.

关键词： Surveys Technological innovation Privacy systems operation system performance Blockchains Safety Prognostics and health management Turbines systematic literature review

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Ultra-wideband MIMO Antenna design Based on EBG Structure

Ultra-wideband MIMO Antenna Design Based on EBG Structure

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Zhipeng Chen Shijie Huang Zhongxiang Zhang Xianliang Wu Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Heifei China Anhui Province Key Laboratory of Simulation and Design for Electronic Information System Hefei Normal University Heifei China

ISBN: (纸本)9781665409889

This paper proposes a low-coupling planar compact four-element ultra-wideband antenna based on the EBG structure for multiple-input multiple-output (MIMO) systems. The MIMO antenna is composed of four miniaturized monopole antenna elements based on the half-cut method and a periodic electromagnetic band gap (EBG) structure. The traditional mushroom-shaped EBG structure is cut into squares and a pair of harpoon-shaped microstrip lines are introduced. Structure to reduce its resonant frequency and increase the band gap width. By loading the improved EBG structure in the middle of the MIMO antenna, the electromagnetic coupling between the components is greatly reduced. In addition, the stop band characteristics in the WLAN band (5.725–5.825GHz) are realized by adding a U-shaped resonant stub to the right side of the feeder of the monopole antenna. The experimental results show that it has a good reflection coefficient in the passband bandwidth range of 2.90–11.7GHz, covering the 3.1–10.6GHz frequency band specified by UWB, the isolation between the components is greater than 15dB, and good envelope correlation. The coefficient ECC is <0.02, which proves that the antenna is a potential candidate for ultra-wideband applications.

关键词： Correlation Resonant frequency Bandwidth Metamaterials Ultra wideband antennas Reflection coefficient Passband

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