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SSRN 2024年

作者： Li, Jinyue Li, Yibin Lian, Jiadi Wei, Liejiang Zhang, Renhui College of Energy and Power Engineering Lanzhou University of Technology Lanzhou730050 China Key Laboratory of Advanced Pumps Valves and Fluid Control System of the Ministry of Education Lanzhou University of Technology Lanzhou730050 China College of Mechanical and Electrical Engineering China Jiliang University Hangzhou310018 China

With the intention of studying the self-priming process and the influencing factors of self-priming performance of vacuum cam pump, a self-priming performance test device suitable for high suction range pump is designed in this paper. By recording the change of the vacuum degree at inlet and the change of external characteristic parameters during the self-priming process, the influence of different speed (200rpm, 250rpm, 300rpm, 350rpm, 400rpm) on the self-priming performance and external characteristic parameters during the self-priming process was compared and analyzed when the inlet vacuum degree was 0.07MPa. According to the phase change of the Suction medium, the self-priming process is divided into three stages: inhale, gas-liquid mixed transport and steady operation. The results show that speed has a great influence on the self-priming process, which mainly reflects the change of external characteristic parameters. The influence on the self-priming performance is mainly manifested in the inhale stage, and the gap leakage has a great influence on the duration of the inhale stage. The high speed can effectively improve the gap leakage in the pump and improve the self-priming performance. © 2024, The Authors. All rights reserved.

关键词： Cams

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Small-size temperature/high-pressure integrated sensor via flip-chip method

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Microsystems & Nanoengineering 2024年第4期10卷 153-162页

作者： Mimi Huang Xiaoyu Wu Libo Zhao Xiangguang Han Yong Xia Yi Gao Zeyu Cui Cheng Zhang Xiaokai Yang Zhixia Qiao Zhikang Li Feng Han Ping Yang Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi’an Jiaotong UniversityXi’an 710049China Xi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and System Xi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China School of Mechanical Engineering Xi’an Jiaotong University710049 Xi’anChina School of Instrument Science and Technology Xi’an Jiaotong University710049 Xi’anChina Chongqing Key Laboratory of Micro-Nano Systems and Intelligent Sensing Chongqing Academician WorkstationChongqing 2011 Collaborative Innovation Center of Micro/Nano Sensing and Intelligent Ecological Internet of ThingsChongqing Technology and Business UniversityNan’an DistrictChongqing 400067China Xi’an Aerospace Yuanzheng Fluid Control Co.Ltd. Xi’an 710049China

Hydraulic technology with smaller sizes and higher reliability trends,including fault prediction and intelligent control,requires high-performance temperature and pressure-integrated *** designs rely on planar wafer-or chip-level integration,which is limited by pressure range,chip size,and low *** propose a small-size temperature/high-pressure integrated sensor via the flip-chip *** pressure and temperature units are arranged vertically,and the sensing signals of the two units are integrated into one plane through silicon vias and gold–gold bonding,reducing the lateral size and improving the efficiency of signal *** flip-chip technique ensures a reliable electrical connection.A square diaphragm with rounded corners is designed and optimised with simulation to sense high pressure based on the piezoresistive *** temperature sensing unit with a thin-film platinum resistor measures temperature and provides back-end high-precision compensation,which will improve the precision of the pressure *** integrated chip is fabricated by MEMS technology and packaged to fabricate the extremely small integrated *** integrated sensor is characterised,and the pressure sensor exhibits a sensitivity and sensitivity drift of 7.97mV/MPa and−0.19%FS in the range of 0–20 MPa and−40 to 120℃.The linearity,hysteresis,repeatability,accuracy,basic error,and zero-time drift are 0.16%FS,0.04%FS,0.06%FS,0.18%FS,±0.23%FS and 0.04%FS,*** measurement error of the temperature sensor and temperature coefficient of resistance is less than±1°C and 3142.997 ppm/℃,*** integrated sensor has broad applicability in fault diagnosis and safety monitoring of high-end equipment such as automobile detection,industrial equipment,and oil drilling platforms.

关键词： size corners sizes

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Reform and Practice in Experimental Teaching from the View of "Emerging engineering": Case Study on the Field of Energy and Power engineering

Reform and Practice in Experimental Teaching from the View o...

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Information Communication Technologies Conference (ICTC)

作者： He Tian Lijian Liu Miao Tian Shimin Zhou Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology) School of Mechanical Engineering Tianjin University of Technology Tianjin China Tianjin Academy of Educational Science Tianjin China Tianjin Newborn New Energy Technology Co. Ltd Tianjin China

According to the idea of "Emerging engineering Education" talent training model of Ministry of Education, students should be trained to have "metaphysical" concept, connection, imagination, macro thinking. Project-driven experiment teaching focuses on a project, and the goal is the completion of the project; the student is the center of teaching activities, which is supported by the inquiry process. This study analyzes the significance of the project-driven method in experimental teaching. This paper describes the implementation process of experimental teaching in the field of energy and power engineering in terms of project design, teaching system construction and so on under the project-driven method. By analyzing the results of a questionnaire survey distributed to students of energy and power in the College of mechanical engineering at the Tianjin University of Technology, it is found that the students are satisfied with the effects of project-driven experimental teaching, and the use of experimental teaching has greatly aroused the students' enthusiasm for learning. The ability of the students to engage in autonomous learning, engineering practice and innovation has been greatly improved, and a good teaching effect has been achieved.

关键词： Training Power engineering Technological innovation Education Solids Communications technology mechanical engineering

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Wear Behaviour of Deep Cryogenically Treated Coated Tool During End Milling of Xh67mbtho

SSRN

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SSRN 2024年

作者： Sasi, Jayaram C. Mathew, Jose George, Allan Kuriachen, Basil Dhanish, P.B. Oommen, George Anoop, C.R. Advanced Manufacturing Centre Department of Mechanical Engineering National Institute of Technology Calicut India National Institute of Technology Materials and Manufacturing Entity LPSC Indian Space Research Organisation India Control System and Components Entity LPSC Indian Space Research Organisation India

Current study investigates the influence of deep cryogenic treatment on wear mechanisms across the WC milling inserts while machining XH67MBTHO, a nickel-based superalloy which finds enormous applications in high temperature applications of aerospace engines. With aid of SEM and EDS analysis various mechanism of tool wear including diffusion, abrasion, plastic deformation was studied observed for both cryo treated and untreated tool. A maximum reduction of 26% on flank wear, 48.93% on worn out crater area, 26.97% on resultant cutting force,23.8% on surface roughness was observed while using treated tool in comparison with untreated. © 2024, The Authors. All rights reserved.

关键词： Cryogenics

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Design of an Embedded Leg Capsule Robot

Design of an Embedded Leg Capsule Robot

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IEEE International Conference on Mechatronics and Automation

作者： Yihui Wang Tao Xue Jing Wang Yimuranjiang Yueliwasi Tianjin Key Laboratory for Advanced Electromechanical System Design and Intelligent Control Tianjin University of Technology 391 Binshui Xidao Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology 391 Binshui Xidao Tianjin China

The capsule robot enters the patient’s intestinal system directly by swallowing and takes continuous images using the miniature camera unit it carries, but during its travel, its own gravity and the peristaltic movement of the intestine make the physician limited in obtaining images of the intestine and making a diagnosis. In order to solve this problem, a capsule endoscope with an embedded leg mechanism is proposed. Compared to commercially available capsule robot. This capsule robot can easily move through the intestine autonomously by means of the relationship between the leg, the screw nut and the linkage, enabling forward, backward and stationary functions. The capsule robot has a diameter of 14 mm, a length of 30 mm and a maximum diameter of 26.66 mm with the legs spread out. The hollow space is allocated to include basic endoscopic components such as a miniature camera and a rotating motor. A series of tests, including in vitro tests, were carried out to test the feasibility of the leg mechanism of this capsule robot. Based on the results of the experiments, the proposed leg mechanism can effectively act on the Micro-capsule endoscope, and is able to move effectively through the intestine.

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A Basic Experiment for Image-Based Position Measurement of Objects at Sea

A Basic Experiment for Image-Based Position Measurement of O...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Fumiaki Takemura Norimitsu Sakagami Satoru Takahashi Rintaro Ono Yumiko Nakanishi Natsuki Uechi Kazuma Noha Kuniaki Kawabata Shinichi Sagara Chiaki Katagiri Yuji Yamamoto Department of Mechanical Systems Engineering National Institute of Technology Okinawa College Department of Navigation and Ocean Engineering Tokai University Department of Intelligent Mechanical Systems Engineering Kagawa University Department of Maritime Civilization Tokai University Cultural Property Preservation Division Osaka Prefectural Board of Education Advanced Course National Institute of Technology Okinawa College RIKEN-XJTU Joint Research Unit Department of Mechanical and Control Engineering Kyushu Institute of Technology Okinawa Prefectural Museum and Art Museum Asian Research institute of underwater archaeology

ISBN: (纸本)9781479917631

This paper presents an image-based position measurement of underwater objects using a low-cost maritime mobile robot with a monocular camera. Visual recognition of distant underwater objects is possible in the water with high transparency, for example, in the coastal sea area of Okinawa prefecture, Japan. In this paper, we apply the proposed method to estimate the position of an old anchor that is at a deep of 30 [m] and is estimated to be hundreds-of-years-old in an archaeological site in Ishigaki Island. We explain the measurement principle of the proposed method and the developed system. Moreover, we describe the experiment conducted off the coast of Ishigaki Island and show the experimental results of the proposed method.

关键词： Position measurement of underwater objects Image processing Camera GPS Attitude sensor Depth sensor

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Research on Feedforward control Based on Robot Dynamics Parameters Identification

Research on Feedforward Control Based on Robot Dynamics Para...

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IEEE International Conference on Mechatronics and Automation

作者： Xingmao Shao Shoujun Wang Liusong Yang Nan Liu Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Tianjin China CITIC Heavy Industries Company Ltd. Luoyang China

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164175

Accurate robot dynamics model can effectively improve the motion control performance of robot, and accurate dynamics parameters are the basis for establishing dynamics model. This paper discusses the parameter identification method of the tandem manipulator and the feedforward control scheme based on dynamics. First, we deduced the basic parameters of the first three joints of the UR5 manipulator, and identified the parameters through experimental sampling and calculation. Secondly, we established a feedforward control mechanism based on dynamics using the Simulink platform, and simulated and verified the feedforward control of the robot three-axis system. The experimental results show that the feedforward control scheme based on robot dynamics can effectively improve the error convergence performance, which proves the effectiveness of the method.

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RETRACTED ARTICLE:Thermal,mechanical,and tribological properties of sodium-montmorillonite-nanoparticle-reinforced polyethersulfone and polytetrafluoroethylene ternary composites

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Friction 2022年第7期10卷 1134-1134页

作者： Shicheng YAN Yahong XUE Yahui HU Shoujun WANG Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin 300384China College of Mechanical Engineering Tianjin University of TechnologyTianjin 300384China

The Editor-in-Chief has retracted this article[1]because a large number of figures as well significant parts of the text overlap with the 2017 *** by Zhen Zuo[2].All authors agree to this retraction.[1]Yan S C,Xue Y H,Hu Y H,Wang S ***,mechanical,and tribological properties of sodium-montmorillonite-nanoparticlereinforced polyethersulfone and polytetrafluoroethylene ternary ***(2020).https://***/10.1007/s40544-019-0343-x.[2]Zuo *** on tribological property and friction interface interaction of PES/PTFE ***.D ***(China):Yanshan University,2017.

关键词： friction Friction tribological

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Finite Element Analysis of Series Elastic Actuator for Exoskeleton Robot Joint

Finite Element Analysis of Series Elastic Actuator for Exosk...

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IEEE International Conference on Mechatronics and Automation

作者： Pengyu Xi Weimin Ge Sen Zhang Zhili Zhang Teresa Zielinska Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Intelligent Manufacturing College Tianjin Sino-German University of Applied Science Tianjin China Institute of Aeronautics and Applied Mechanics Warsaw University of Technology Warsaw Poland

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164175

The finite element simulation for the joints of an exoskeleton robot is conducted in this paper. Using software OpenSim to simulate the normal walking gait of the human body, the motion angle and moment of the human hip, knee and ankle joints are obtained. Using the obtained data as the input parameters in the finite element simulation of the simulation software Ls-dyna, the strain diagrams and contact force curves of the circular roller and cam disk were obtained. In this study, three commonly used materials are selected: alloy steel, ductile iron and hard aluminum alloy. Finally, the effects of different materials on the key components of the series elastic actuator are studied.

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Application of Digital Twin Technology in the Teaching of engineering Drawing course

Application of Digital Twin Technology in the Teaching of En...

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Information Science and Education (ICISE-IE), International Conference on

作者： Runfeng Zhang Yuxin Tang Zhenzhong Liu Yanfang Sun Jianguo Wu Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Tianjin China School of Language and Culture Tianjin University of Technology Tianjin China Tianjin Hanhailanfan Marine Technology Co. Ltd. Tianjin China

As an advanced technology that integrates virtuality and reality, digital twin technology has shown a wide range of application prospects in various fields. This paper aims to explore the potential application of digital twin technology in the teaching of engineering drawing courses, to improve students' theoretical knowledge and practical ability. By combining digital twin technology with traditional engineering drawing teaching, students can carry out practical operations and simulations in a virtual environment to better understand and apply drawing concepts and principles. Besides, taking the assembly drawing of thread connection as an actual teaching case, the specific application of digital twin technology in theoretical and experimental teaching is explained, respectively. The results show that digital twin technology is conducive to improving students' interest in engineering drawing courses and training students' spatial imagination ability, which is of great significance to reforming drawing courses.

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