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6th International Conference on Computer Information Science and Application technology, CISAT 2023

作者： Liu, Yunsong Zhao, Yongsheng Niu, Nana Chen, Kui Institute of Advanced Manufacturing and Intelligent Technology Beijing University of Technology Beijing100124 China Beijing Key Laboratory of Advanced Manufacturing Technology Beijing University of Technology Beijing100124 China

ISBN: (纸本)9781510668546

The contact characteristics of bolted joint surfaces are the key to affect the dynamic and static characteristics of mechanical systems. When the joint surface is in the vibration fatigue state, the damping will increase and the resonance frequency will decrease. Therefore, it is very important to establish an accurate contact model of the bolted joint surface to study the dynamic characteristics of the whole machine tool. Firstly, the contact model of a single asperity on rough surface is established based on Herz contact theory. On this basis, the contact stiffness and contact damping model of the whole bolted joint surface are obtained by integrating the asperity on the surface based on fractal theory;The influence of assembly load F, fractal dimension D and fractal rough ness coefficient G on contact stiffness K and contact damping C is obtained through the numerical analysis of the stiffness damping model by writing a Matlab program;Through finite element modal simulation, the mapping relationship between contact stiffness, damping and natural frequency of assembly structure is explored;The research results show that the contact stiffness and contact damping can not meet the improvement of the dynamic characteristics of the assembly at the same time. In this paper, the contact parameters of the bolted joint surface were optimized by the method of theoretical modeling, numerical simulation and finite element analysis, which improved the assembly performance and machining accuracy of the whole machine, and provided a theoretical basis for the realization of intelligent manufacturing. © 2023 SPIE.

关键词： Bolted joints

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Knowledge mapping analysis of the track and hotspot of water lubrication:A scientometrics review

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Friction 2023年第9期11卷 1557-1591页

作者： Runzhou XU Defa WU Zhenyao WANG Yipan DENG Qian CHENG Hao PANG Wenshu WEI Yinshui LIU State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Beijing Tianma Intelligent Control Technology Co. Ltd.Beijing 101300China

With the enhancement of environmental protection awareness of the international community and the continuous promotion of green and sustainable development of manufacturing industry,water lubrication instead of mineral oil has become the future development trend due to its green,pollution-free,clean,safe,and sustainable advantages especially in ships,marine,coal mining,and other *** recent years,with the rapid development of water lubrication research,significant progress has been made in related research knowledge domain and discipline.A systematic and extensive assessment of water lubrication research has become increasingly *** objective of this research is to reveal the research status,research hotspots,and development trends in the field of water ***,CiteSpace was used to conduct a systematic bibliometric and scientometrical analysis of 1,792 publications from Web of Science core collection database(1997–2021).The results show that China and USA are the most productive countries in the field of water lubrication and have made outstanding *** the analysis of hot key words and co-citation references,this paper reviews the research status of water lubrication in three aspects:(1)lubricating medium modification;(2)material preparation;(3)surface *** has become a research hotspot to promote the superlubricity contact interface and the application of *** results of this study can make a significant contribution to the development of water lubrication by providing a comprehensive understanding of the research status and research hotspots in this *** understanding and discussion of research hotspots and research status are expected to provide insights into future research *** addition,this study will provide valuable references and guidelines for researchers who are interested in this field.

关键词： water lubrication friction scientometrics CiteSpace

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Deep Vision Guided Mobile Robot Dual Axis PID Dynamic Real Time Adjustment Following 5

Deep Vision Guided Mobile Robot Dual Axis PID Dynamic Real T...

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5th World Robot Conference Symposium on advanced Robotics and Automation, WRC SARA 2023

作者： Li, Yang Yang, Guanci He, Ling Zhao, Le Zhao, Tianyi Sun, Haoran Guizhou University Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education Guizhou Guiyang550025 China Guizhou University Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education State Key Laboratory of Public Big Data Guizhou Provincial Key Laboratory of Internet+' Collaborative Intelligent Manufacturing Guizhou Guiyang550025 China

ISBN: (纸本)9798350307320

The real-time tracking of moving objects by social robots is crucial for ensuring object-oriented services. This paper presents a real-time following algorithm for mobile robots based on deep vision object detection. Firstly, using a binocular depth vision camera, real-time target information from a firstperson perspective is collected, and a lightweight deep learning model is employed to detect the relative position of the human body posture with respect to the social robot. Subsequently, to address the issue of unsmooth trajectory during the tracking process, a dual-axis PID algorithm is developed for cooperative control of the robot's speed and heading angle. Given the inherent randomness in human body movement, target loss can occur during tracking. To enhance the algorithm's robustness, a dynamic tracking mechanism is introduced. Finally, we implement a vision-driven two-wheel differential social robot following algorithm on the ROS system and validate it through three real-world experimental scenarios. The mean values of the target acquisition rate, tracked target position, and angle smoothness are found to be 0.81, 0.46, and 1.02, respectively. © 2023 IEEE.

关键词： Mobile robots

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Molecular-level proton acceptor boosts oxygen evolution catalysis to enable efficient industrial-scale water splitting

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Green Energy & Environment 2024年第2期9卷 344-355页

作者： Yaobin Wang Qian Lu Xinlei Ge Feng Li Le Chen Zhihui Zhang Zhengping Fu Yalin Lu Yang Song Yunfei Bu Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)UNIST-NUIST Energy and Environment Jointed Lab(UNNU)School of Environmental Science and TechnologyNanjing University of Information Science and Technology(NUIST)219 NingliuNanjing210044China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan University220 HandanShanghai200433China Jiangsu Key Laboratory of Advanced Materials and Technology School of Petrochemical EngineeringChangzhou University1 GehuChangzhou213164China Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China(USTC)96 JinzhaiHefeiAnhui 230026China School of Chemistry and Chemical Engineering Nanjing University of Science and Technology200 Xiaolingwei210094China

Industrial water splitting has long been suppressed by the sluggish kinetics of the oxygen evolution reaction(OER),which requires a catalyst to be ***,we propose a molecular-level proton acceptor strategy to produce an efficient OER catalyst that can boost industrial-scale water ***-level phosphate(-PO_(4))group is introduced to modify the surface of PrBa_(0.5)Ca_(0.5)Co_(2)O_(5)+δ(PBCC).The achieved catalyst(PO_(4)-PBCC)exhibits significantly enhanced catalytic performance in alkaline *** on the X-ray absorption spectroscopy results and density functional theory(DFT)calculations,the PO_(4)on the surface,which is regarded as the Lewis base,is the key factor to overcome the kinetic limitation of the proton transfer process during the *** use of the catalyst in a membrane electrode assembly(MEA)is further evaluated for industrial-scale water splitting,and it only needs a low voltage of 1.66 V to achieve a large current density of 1 A cm^(-2).This work provides a new molecular-level strategy to develop highly efficient OER electrocatalysts for industrial applications.

关键词： Oxygen evolution reaction Nanofiber Water splitting Proton acceptor Perovskite

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Intelligent control for quality improvement in green tea fixation assisted with aroma detection

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Food Bioscience 2023年第3期53卷 2939-2951页

作者： Feihu Song Xiaohu Jia Zhenfeng Li Chunfang Song Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology School of Mechanical EngineeringJiangnan UniversityWuxiJiangsu214122PR China

An intelligent control system is designed in green tea fixation,which can automatically and continuously adjust the fixation parameters for quality *** is detected with PEN-3 electronic nose,and signals are sent to the *** the aroma signals,the fixation process is separated into two stages:in the first stage,the key purpose is enzymatic reaction,which can be suppressed with high temperature;it is the oxidation re-action which should be concentrated on in the second stage,and a middle temperature is a good *** the designed fuzzy logic algorithm,the pot temperature is kept at a high level at the beginning,and the enzymatic reaction can be successfully *** the second stage,the temperature is kept at a middle value to decrease *** the designed intelligent control,the green tea product quality is improved for aroma,taste,appearance,liquor color,and residues.

关键词： Intelligent control Green tea fixation Fuzzy algorithm Aroma detection

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Recent Patents on Pitching Machine

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Recent Patents on Engineering 2024年第1期18卷 145-154页

作者： Yao, Lan Xiang, Chao-Fang Yu, Jia-Wei Jiang, Yu-Peng Department of Physical Education Harbin University of Science and Technology Harbin150080 China Key Laboratory of Advanced Manufacturing and Intelligent Technology School of Mechanical and Power Engineering Ministry of Education Harbin University of Science and Technology Harbin150080 China

With the improvement of living standards and the acceleration of the pace of modern life, people pay more and more attention to health. All kinds of ball games are deeply loved by people. Most people like to go to all kinds of equipment halls for all kinds of sports. However, at present, there are few types of service machines, and there is still a lot of room for development. With the development of ball games, small simple serve machine, as important equipment for modern entertainment and sports, has research projects in various countries and occupies a large market share. The purpose of this study is to synthesize the existing pitching mechanism, summarize and analyze the advantages and disadvantages of various pitching mechanisms from a large number of documents and patents, and solve some problems with the existing pitching machine. This paper summarizes various patents and the latest research progress on ball-pitching machines. From the mechanical structure of the pitching machine to the functions it can realize, the advantages and disadvantages of the serving machine are analyzed. By summarizing the characteristics of a large number of pitching mechanisms, this paper analyzes some problems existing in the pitching machine and looks forward to the research and design of the pitching machine. Combined with relevant mechanical technology, this paper refers to the patents related to various ball automatic mechanical pitching devices and draws valuable conclusions through the summary and comparison of these patents. © 2024 Bentham Science Publishers.

关键词： Sports

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ANALYSIS OF THE INFLUENCE OF MEASUREMENT FOR THE control CIRCUIT OF GRAVITY GRADIOMETER ON GRAVITY GRADIENT MEASUREMENT

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical Engineering and Computer Science 2024年第2期86卷 201-210页

作者： Qian, Xuewu Ning, Tingzhou School of Electronic Engineering Jinan Vocational College Jinan250103 China School of Mechanical Manufacturing Jinan Vocational College Jinan250103 China Jinan Key Laboratory of 5G + Advanced Control Technology Jinan Vocational College Jinan250103 China

In order to study the influence of the measurement and control circuit system on gravity gradient components, the analysis started from the amplification gain and initial phase angle of the control circuit. The impact of gain discrepancies and initial phase angle errors in the control circuit on gravity gradients were analyzed, leading to certain conclusions. The adder and voltage amplifier gain errors in the control circuit have a significant effect on the gradient measurement. The amplification gain of the control circuit system has a greater impact on larger gradient components and a smaller impact on smaller gradient components. The initial phase angle error and the amplification gain of the measurement and control system have opposite effects on the gradient components. Finally, a method for achieving precise positioning of the initial phase angle using trigger pulse was proposed. Through experiments with the control system, when the sampling rate is 10Hz, the maximum gradient error was 0.1Eu, meeting the experimental requirements. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： control systems

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Coercivity mechanism of high-performance anisotropic heterostructure SmCo_(5)magnets

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Journal of Rare Earths 2024年第10期42卷 1882-1888页

作者： Yuan Teng Yuqing Li Weiqiang Liu Xiaochang Xu Zhanjia Wang Jianjun Yang Dongtao Zhang Hongguo Zhang Qingmei Lu Qiong Wu Weixing Xia Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing100124China School of Mechanical and Electrical Engineering Henan Institute of Science and TechnologyXinxiang453000China School of Mechanical Engineering Anyang Institute of TechnologyAnyang455000China Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo315201China

Due to its large magnetocrystalline anisotropy field and high Curie temperature,SmCo-based magnets are irreplaceable in high-temperature applications,The hot-deformed SmCo-based magnets are especially attractive for their excellent corrosion resistance,making them more suitable for harsh ***,it is still challenging for hot-deformed SmCo-based magnets to obtain high magnetization and high coercivity ***,it is necessary to analyze the relationship between its microstructure and magnetic properties and explore its magnetic hardening mechanism to guide the further improvement of magnetic *** this paper,the anisotropic heterostructure SmCo_(5)magnet was prepared by combining large height-reduction and introducing a nano-grained Smrich *** c-axis texture,(BH)m of 16.1 MGOe,and H_(ci)of 9.6 kOe were obtained via the heterostructure with SmCo_(5)micron-grain and Sm-rich nano-scale *** magnetic domain observation and technical magnetization analysis demonstrate that the coe rcivity mechanism is dominated by *** results also show that the smooth and Sm-rich precipitated grain boundary provides weak pinning *** provides a reference for the development of high-pe rformance nanocrystalline SmCo_(5)magnets.

关键词： Permanent magnet Heterostructure Rare earths Coercivity mechanism Hot-deformed SmCo magnet

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A Bolt Fastening Robot System Based on Hybrid Vision and Its Effect Analysis of Process Parameters on Fastening Performance 17th

A Bolt Fastening Robot System Based on Hybrid Vision and Its...

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17th International Conference on Intelligent Robotics and Applications, ICIRA 2024

作者： Chen, Jianzhou Liu, Zhifeng Xu, Jingjing Hun, Lianming Tao, Long Peng, Kaiguo Key Laboratory of Advanced Manufacturing and Intelligent Technology for High-End CNC Equipment Jilin University Changchun130025 China Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin University Changchun130025 China Institute of Advanced Manufacturing Technology and Institute of Advanced Manufacturing and Intelligent Technology Beijing University of Technology Beijing100124 China Jiangxi Tianyue Automobile Parts Co. Ltd. Jiangxi336000 China

ISBN: (纸本)9789819607761

With the improvement of industrial automation levels, the demand for automatic assembly increases. In this work, a bolt fastening robotic system based on hybrid vision is proposed to enhance environmental adaptability and reduce costs. In its fastening strategy, the hole pose is determined accurately using hybrid vision, which uses the scene camera to obtain the rough pose and uses the end-effector camera to obtain the precision pose based on its high-quality images acquisition. After the positioning, the efficiency of the fastening process is significantly influenced by motion parameters of the robotic system, such as the angle between bolt and hole, the speed of the end-effector, and the rotation speed of the tool. The maximum allowable angle of bolt and hole is calculated. The M10 bolt can be smoothly inserted into the hole when angle is less than 2.92 degrees. The experiments were conducted to investigate how changes in these motion parameters collectively impact bolt fastening efficiency. Changes in the angle between the bolt and the hole do not affect the robotic bolt fastening efficiency. These results provide the significant theoretical basis for the selection of process parameters of the robotic system, considering the specific requirements of the bolt assembly task. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Bolts

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Carbon film prepared via electron cyclotron resonance ion irradiation and its tribological properties under different friction conditions

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Ceramics International 2025年第17期51卷 23233-23243页

作者： Liu, Xianwen Zhang, Hao Lin, Guilin Shi, Hongyan Diao, Dongfeng State Key Laboratory of Radio Frequency Heterogeneous Integration Shenzhen University Shenzhen518060 China Shenzhen Key Laboratory of Advanced Manufacturing Technology for Mold & Die Shenzhen University Shenzhen518060 China Institute of Nanosurface Science and Engineering Shenzhen University Shenzhen518060 China

Electron cyclotron resonance (ECR) ion irradiation technology, with the characteristics of high plasma density and low deposition temperature, is significant to the synthesis of carbon film with high sp3 bond content and strong adhesion. This study focuses on the influence of microwave power on bonding characteristics and mechanical properties of carbon films, which prepared by ECR ion irradiation. And then, the tribological properties of carbon film under different friction conditions are investigated. The results indicate that the increase of microwave power is beneficial to the formation of sp3 bond, which also contributes to the enhancement of mechanical properties. Moreover, the coefficient of friction (COF) is lowest while sliding with zirconia ball, and the strong shearing action between copper ball and carbon film leads to highest graphitization degree. The increasing current and friction cycle intensify the graphitization degree, and the participation of current promotes the formation of cupric oxide. This work reveals the influence mechanism of microwave power to the carbon film properties in ECR ion irradiation, and provides a deeper understanding on tribological mechanism of carbon film under different friction conditions. © 2025

关键词： Graphitization

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