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2nd International Conference on Electronic Information technology and Computer Engineering, EITCE 2018

作者： Li, Lun Yang, Shaodong Li, Jishun School of Mechatronics Engineering Henan University of Science and Technology Luoyang471003 China Henan Key Laboratory for Machinery Design and Transmission System Henan University of Science and Technology Luoyang471003 China

For the process of optimizing the process parameters in the process of cutting the hard and brittle materials such as single-crystal SiC by diamond wire saw, the process parameters such as wire saw speed, workpiece feed speed and workpiece rotation speed are the design variables, and the sawing force and surface roughness are the processing targets by orthogonal experimental design. The grey system theory is introduced to optimize the multi-objective cutting process. According to the experimental data, the grey correlation resolution coefficient is determined. The significant relationship between the processing parameters and the target characteristics is analyzed. The optimal combination of process parameters under multi-target conditions is obtained, namely the workpiece feed rate is 0.025mm/min, the wire saw speed is 1.6m/s, and the workpiece rotating speed is 16r/min. © The Authors, published by EDP sciences, 2018.

关键词： Sawing

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Approaching the Fundamental Limit of Orbital Angular Momentum Multiplexing Through a Hologram Metasurface

arXiv

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arXiv 2021年

作者： Yuan, Shuai S.A. Wu, Jie Chen, Menglin L.N. Lan, Zhihao Zhang, Liang Sun, Sheng Huang, Zhixiang Chen, Xiaoming Zheng, Shilie Jiang, Li Jun Zhang, Xianmin Sha, Wei E.I. College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China Ministry of Education The Key Laboratory of Electromagnetic Environmental Sensing Department of Education of Anhui Province Anhui University Hefei230039 China Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong Department of Electronic and Electrical Engineering University College London Torrington Place LondonWC1E 7JE United Kingdom Anhui Province Key Laboratory of Simulation and Design for Electronic Information System Hefei Normal University Hefei230601 China School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu611731 China School of Information and Communications Engineering Xi’an Jiaotong University Xi’an710049 China

Establishing and approaching the fundamental limit of orbital angular momentum (OAM) multiplexing are necessary and increasingly urgent for current multiple-input multiple-output research. In this work, we elaborate the fundamental limit in terms of independent scattering channels (or the degrees of freedom of scattered fields) through angular-spectral analysis, in conjunction with a rigorous Green’s function method. The scattering-channel limit is universal for arbitrary spatial-mode multiplexing, which is launched by a planar electromagnetic device, such as antenna, metasurface, etc., with a predefined physical size. As a proof of concept, we demonstrate both theoretically and experimentally the limit by a phase-only metasurface hologram that transforms orthogonal OAM modes to plane-wave modes scattered at critically separated angular-spectral regions. Particularly, a minimax optimization algorithm is applied to suppress angular-spectrum aliasing, achieving good performances in both full-wave simulation and experimental measurement at microwave frequencies. This work offers a theoretical upper bound and corresponding approach route for engineering designs of OAM multiplexing. Copyright © 2021, The Authors. All rights reserved.

关键词： Spectrum analysis

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Experimental Evaluation of a Novel Personal Assistant in Greek Language for Ambient Assisted Living Environments employing home robots

Experimental Evaluation of a Novel Personal Assistant in Gre...

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2018 South-East Europe design Automation, Computer Engineering, Computer Networks and Social Media Conference, SEEDA_CECNSM 2018

作者： Spournias, Alexandros Christopoulos, Konstantinos Antonopoulos, Konstantinos Panagiotou, Christos Antonopoulos, Christos Orfanoudakis, Theofanis Voros, Nikolaos Computer and Informatics Engineering Department Embedded System Design and Application Laboratory TEI of Western Greece Antirio Greece Embedded System Design and Application Laboratory School of Science and Technology Digital Systems and Media Computing Laboratory TEI of Western Greece Hellenic Open University Patras Greece Embedded System Design and Application Laboratory TEI of Western Greece Antirio Greece School of Science and Technology Digital Systems and Media Computing Laboratory Hellenic Open University Patras Greece

ISBN: (纸本)9786188331419

A personal assistance, is a software component offering advanced Human Machine Interface (HMI) features by initiating and making a "conversations" between humans and machines. Its main objective is to identify the sentences and the context from human's question and respectively give an adequate response to the question posed. The proper response is given after analyzing the words of the question with those registered in its database. This type of application is called a personal assistant - chatbot. In this work, such an application is presented where it can be installed in any smart home as well as assisted living environment. Through the application, all automations, as well as the home robot also, are controlled by human voice in Greek language. Also, a number of auxiliary applications can be performed in the direction of better human service. © 2018 Tei of Western Macedonia.

关键词： Assisted living

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Research on Quantification Method of Maize Leaf Phenotype Parameters Based on Machine Vision

Research on Quantification Method of Maize Leaf Phenotype Pa...

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Computer Engineering and Intelligent Communications (ISCEIC), International Symposium on

作者： Wang Jinyong Tan Wenrong Hou Shuaimin Wang Yang Zhang Hongna School of Computer Science and Technology Southwest Minzu University for Nationalities China (or P. R. China) Key Laboratory of Computer System National Civil Committee Southwest Minzu University for Nationalities China Inner Mongolia Electric Power Survey and Design Institute Co. Ltd. China School of Computer Science and Technology Southwest Minzu University for Nationalities China Inner Mongolia Qingcheng Urban and Rural Construction Research Institute China

ISBN: (数字)9781728181714

ISBN: (纸本)9781728181721

This paper aims to obtain a model (method) for monitering the growth of corn automatically and accurately. The latest computer vision technology is applied to calculate the method of extracting the surface characteristic parameters. Binocular vision technology is used to calculate the 3D point cloud of maize image. Meanwhile, the 3D point noise reduction established by bilateral filtering is adopted to establish the 3D reconstruction model of maize. In the 3D model, the height and width of maize are calculated proportionally. The error rate of the proposed method is 0.52%. This work provides a reference for the growth monitoring and virtual growth of corn.

关键词： Image segmentation Cameras Three-dimensional displays Fitting Mathematical model Agriculture Error analysis

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Magnetic Continuum Robot for Intelligent Manipulation in Medical Applications

SmartBot

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SmartBot 2025年

作者： Yuanbiao Ma Xuanyu An Qijun Yang Mingxue Cai Zhiqiang Tang Jinke Chang Veronica Iacovacci Tiantian Xu Li Zhang Qianqian Wang Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical Engineering Southeast University Nanjing China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Department of Mechanical Engineering National University of Singapore Queenstown Singapore Department of Engineering Science University of Oxford Oxford UK Department of Surgical Biotechnology Division of Surgery & Interventional Science Centre for Biomaterials in Surgical Reconstruction and Regeneration University College London London UK BioRobotics Institute Scuola Superiore Sant’Anna Pisa Italy Department of Excellence in Robotics & AI Scuola Superiore Sant’Anna Pisa Italy Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong China Chow Yuk Ho Technology Center for Innovative Medicine The Chinese University of Hong Kong Hong Kong China Multi-Scale Medical Robotics Center Hong Kong Science Park Hong Kong China

Magnetic continuum robots (MCRs) have garnered substantial attention as a new class of flexible robotic systems capable of navigating complex and confined spaces with remarkable dexterity. By combining continuous, deformable structures with remotely applied magnetic fields, MCRs achieve contactless, remote manipulation, making them well-suited for medical applications. This review introduces recent advances in MCR research, focusing on design principles, structural configurations, and control strategies. Various MCR designs and structures, including those integrated with permanent magnets, magnetic matter, ferromagnetic sphere, and micro coil, are discussed. Furthermore, different magnetic actuation platforms are introduced, and the level of MCR automation is classified based on control strategies. Key intelligent manipulation capabilities of MCRs, including navigation, delivery, printing, grasping, imaging, and sensing are explored. Finally, future development priorities and directions are identified to provide insights for advancing intelligent robotic systems.

关键词： intelligent manipulation magnetic actuation magnetic continuum robot medical application

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Research on Active Disturbance Rejection Control Method for Electro-hydraulic Servo Loading system with Considering Clearance Disturbance

Research on Active Disturbance Rejection Control Method for ...

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International Conference on Fluid Power and Mechatronics (FPM)

作者： Qiang Chen Fang Yang Dan-dan LIU Yu-jun Xue School of Mechatronics Engineering Henan University of Science & Technology Luoyang China Henan Key Laboratory of Mechanical Design and Transmission System Henan University of Science & Technology Luoyang China Luoyang LYC Rearing Co. Ltd Luoyang China

ISBN: (数字)9781728103112

ISBN: (纸本)9781728103129

In the test of high-speed rail bearings, the electro- hydraulic servo-loading system is commonly used to simulate the actual alternating loading for the bearing. Due to the existence of the loading mechanism clearance and the transmission shaft system matching clearance, the loading system has a certain nonlinear displacement disturbance. Combined with the nonlinear characteristics of the electro-hydraulic servo system, the dynamic response characteristics and steady-state control accuracy of the force loading are seriously affected. To this end, the Active Disturbance Rejection control (ADRC) method is used to identify and compensate the gap disturbances using the feedback information of the extended state observer, and the tracking differentiator and feedback control rate are designed to improve the system response speed and suppress overshoot. The control method is applied to the control model of high-speed rail bearing electro-hydraulic servo-loading system. The simulation results show that the control method can achieve good control effect, and the anti-disturbance capability, response speed and steady-state performance of the system are significantly improved.

关键词： Loading Force Servomotors Laser excitation Electron tubes Hydraulic systems Pressure sensors

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Connectors Based on 2-Way SMA Actuator for Self-reconfigurable Chain Robots

Connectors Based on 2-Way SMA Actuator for Self-reconfigurab...

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IEEE International Conference on Mechatronics and Automation

作者： Fenglei Ni Yongqiang Li Yunhu Zhou Hong Liu Yuan Tang State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin Heilongjiang Province China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu China

Self-reconfigurable modular robots have shown great potential in carrying out multiple tasks in different conditions. A connection of both flexibility and reliability is critical for realizing the docking and transformation of the modular robots. We propose a new design of connectors based on SMA which has the advantages of high autonomy, small size and high speed. The couples of connectors consist of active and passive connector. In the active connector, a two-way rotary SMA actuator is used as the actuation mechanism. The double-layer cam and claws are used as an executive mechanism. The passive connector can be securely docked in five different facets for 3D reconfigurations. The multisensory system and hardware architecture provide the foundation for control strategies. The design and the prototype of the connector are described in this paper. Finally, experimental results to evaluate the performance of docking are presented.

关键词： Connectors Robots Contacts Wires Actuators Springs Task analysis

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Inchworm-inspired soft climbing robot using microspine arrays

Inchworm-inspired soft climbing robot using microspine array...

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2019 IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Qiqiang Hu Erbao Dong Gang Cheng Hu Jin Jie Yang Dong Sun CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei China CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei PRC Anhui Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System Engineering Beijing PRC Department of Biomedical Engineering City University of Hong Kong Hong Kong SAR

Animals in nature, such as geckos, inchworms, and felines can climb on various surfaces using different mechanisms and serve as references for the study of bio-inspired robots. This paper presents an inchworm-inspired climbing robot that consists of soft body and feet. The soft robot is actuated by shape memory alloy wires and utilizes microspine arrays to attach its feet to rough or soft surfaces. A series of experiments to test the functionality of the feet and torso of the designed robot have verified the theoretical feasibility of the robot. Results have shown that the designed bio-inspired robot can climb on inclined or vertical curved surfaces and flat surfaces. The robot can also adapt to the underwater environment. Thus, this robot has great potential for various applications such as pipeline inspection.

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Multi-objective Optimization of Non-uniform Beam for Minimum Weight and Sound Radiation

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Transactions of Tianjin University 2017年第4期23卷 380-393页

作者： Furui Xiong Mengxin He Yousef Naranjani Qian Ding Jianqiao Sun Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China School of Mechanical Engineering Tianjin University School of Engineering University of California Merced

A multi-objective optimization of non-uniform beams is presented for minimum radiated sound power and weight. The transfer matrix method is used to compute the structural and acoustic responses of a non-uniform beam accurately and efficiently. The multi-objective particle swarm optimization technique is applied to search the Pareto optimal solutions that represent various compromises between weight and sound radiation. Several constraints are imposed, which substantially reduce the volume fraction of feasible solutions in the design space. Two non-uniform beams with different boundary conditions are studied to demonstrate the multi-objective optimal designs of the structure. © 2017, Tianjin University and Springer-Verlag Berlin Heidelberg.

关键词： Acoustic generators Acoustic properties Acoustic wave propagation Acoustic wave scattering Optimal systems Pareto principle Particle swarm optimization (PSO) Transfer matrix method

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Visual Detection Method for Spatial Transverse Vibration Displacement of Wire Rope in Multi-point Synchronous Hoisting system

Visual Detection Method for Spatial Transverse Vibration Dis...

引用

Chinese Automation Congress (CAC)

作者： Nana Fan Fang Yang Jishun Li Shengyong Zou Henan Key Laboratory for Machinery Design and Transmission System School of Mechatronics Engineering Henan University of Science and Technology Luoyang China Henan Key Laboratory for Machinery Design and Transmission System State Key Laboratory of Mining Heavy Equipment(CITIC-Heavy Industries Co. Ltd) Luoyang China Henan Key Laboratory for Machinery Design and Transmission System School of Mechatronics Engineering Henan University of Science and Technology State Key Laboratory of Mining Heavy Equipment(CITIC-Heavy Industries Co. Ltd) Luoyang China State Key Laboratory of Mining Heavy Equipment(CITIC-Heavy Industries Co. Ltd) Luoyang China

In order to detect the healthy running state of wire rope efficiently and accurately in multi-point synchronous hoisting system, this paper proposed a method based on orthogonal image technology to detect the spatial transverse vibration displacement of wire rope. Firstly, two sets of images were captured synchronously at the same frequency by two high-speed video cameras where set vertically each other. Secondly, binarization and calculation of actual vibration displacement of wire rope were carried out with LabVIEW, and recording the real-time vibration of wire rope. At last, empirical mode decomposition method was used to remove the periodic excitation caused by the displacement of rope-arranging. The spatial vibration shape of the wire rope and the vibration trajectory in the cross section of the wire rope were obtained by fitting these data on Matlab. The experimental results show that this method can accurately reflect the law of the spatial transverse vibration of wire rope. It can provide technical support for the study of the detection and evaluation of the safety parameters of the hoisting system.

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