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Dynamic Modeling and Experimental Verification of an RPR Type Compliant Paralle Mechanism with Low Orders

Chinese Journal of Mechanical Engineering 2024年第3期37卷 83-94页

作者： Shuang Zhang Jingfang Liu Huafeng Ding Yanbin Zhang School of Mechatronics Engineering Henan University of Science and TechnologyLuoyangHenanChina Faculty of Materials and Manufacturing College of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijingChina Key laboratory of advanced manufacturing technology Beijing University of TechnologyBeijingChina School of Mechanical Engineering and Electronic Information China University of Geosciences(Wuhan)WuhanChina Center of Machinery Equipment Advanced Manufacturing of Henan Province LuoyangChina

Efficiency of calculating a dynamic response is an important point of the compliant mechanism for posture *** modeling with low orders of a 2R1T compliant parallel mechanism is studied in the *** mechanism with two out-of-plane rotational and one lifting degrees of freedom(DoFs)plays an important role in posture *** on elastic beam theory,the stiffness matrix and mass matrix of the beam element are established where the moment of inertia is *** improve solving efficiency,a dynamic model with low orders of the mechanism is established based on a modified modal synthesis ***,each branch of the RPR type mechanism is divided into a ***,a set of hypothetical modes of each substructure is obtained based on the C-B ***,dynamic equation of the whole mechanism is established by the substructure assembly.A dynamic experiment is conducted to verify the dynamic characteristics of the compliant mechanism.

关键词： Compliant parallel mechanism Dynamic model Modal synthesis method Dynamic experiment

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DYNAMIC CHARACTERISTICS OF V-SHAPED POCKET BEARING UNDER THERMAL-MECHANICAL COUPLING EFFECT

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UPB Scientific Bulletin, Series D: Mechanical Engineering 2024年第1期86卷 47-60页

作者： Huang, Jie Liu, Yanbin Li, Xuying Yang, Kun Ling, Jinbo School of Mechatronics Engineering Henan University of Science and Technology Henan Luoyang471003 China Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province Henan University of Science and Technology Henan Luoyang471003 China

Aiming at the problem of thermal deformation in bearing at high rotation speed, which affects the working accuracy of bearing, the influence of thermal-mechanical coupling on the dynamic characteristics of V-shaped pocket cylindrical roller bearing was studied. The heat transfer theory was used to establish the bearing thermal network model considering the V-shaped pocket, and the temperature of each node and the thermal deformation of each component were obtained. The bearing dynamics model considering thermal-mechanical coupling was established by combining with multi-body dynamics theory. The effect of the operating conditions on the thermal deformation of the V-shaped pocket was analyzed, and the evolution law of cage slip rate and the collision force between the roller and V-shaped pocket under the action of thermal-mechanical coupling was explored. The results indicate that under high rotation speed and light load, the influence of speed and load on the temperature rise and thermal deformation of the V-shaped pocket is relatively small. However, when the rotation speed is in the range of 18000~21000r/min, the cage slip rate decreases with the increase of speed, while when the load is in the range of 100~500N, the cage slip rate increases with the growth of load. In addition, the collision force between the roller and V-shaped pocket under the consideration of thermal deformation increases greatly compared with that without thermal deformation. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Rollers (machine components)

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Analysis of high speed thermal characteristics of v-shaped pocket cylindrical roller bearing

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UPB Scientific Bulletin, Series D: Mechanical Engineering 2023年第3期85卷 145-166页

作者： Huang, Jie Yanbin Liu Li, Xuying School of Mechatronics Engineering Henan University of Science and Technology Luoyang471003 China Henan Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing Henan University of Science and Technology Luoyang471003 China

The cylindrical roller bearing with V-shaped pocket has good anti-skidding performance, but the characteristics of frictional heat generation between the roller and pocket are still unclear. Therefore, this paper established the analysis model of bearing dynamics and frictional power loss based on the tribological principle, multibody dynamics theory, to study the influence of different geometric parameters of V- shaped pocket on pocket frictional heat generation, and the V-shaped pocket geometric parameters were optimized by the orthogonal test method, the frictional heat generation characteristics of the optimized bearing pocket and various components were discussed. The findings indicate that the frictional heat generation of the V-shaped pocket is significantly influenced by its geometric features, and the frictional heat generation rises with the increase of rotation speed and load;the pocket frictional heat generation and overall frictional heat generation of the optimized bearing under high speed and light load operating condition are lower than that of the ordinary bearing. © 2023, Politechnica University of Bucharest. All rights reserved.

关键词： Friction

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A bearing fault diagnosis and monitoring software system based on lightweight neural networks to resist coloured noise

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International Journal of Industrial and Systems Engineering 2025年第3期49卷 380-403页

作者： Pan, Wujiu Sun, Yinghao Cao, Shuming Kong, Kuishan Wang, Junyi Nie, Peng School of Mechatronics Engineering Shenyang Aerospace University Shenyang110136 China Advanced Manufacturing Technology Research Center Shenyang Aerospace University Shenyang110136 China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang100196 China

In actual industrial sites, the application of bearings is becoming increasingly widespread. In order to better monitor the faults of bearings, this article combines the concept of deep learning and designs a bearing fault diagnosis and monitoring software system based on lightweight neural networks to resist coloured noise. This system is developed based on MATLAB App Designer. When testing the system, five different bearing datasets, namely MFPT, Paderborn, IMS, Ottawa, and CWRU, are applied. Considering that the data in actual scenarios contains complex noise, coloured noise signals are added. Compared to traditional fault diagnosis software that requires pre writing data into the program, this software can perform real-time processing on any single column vibration data file. By using lightweight neural network methods to preprocess the data collected by sensors, the SqueezeNet network has a faster speed to extract significant features of vibration. This software system can achieve time-frequency domain image output of signals, with multiple noise reduction methods. It can also calculate the frequency of faults based on bearing model data. Through envelope spectrum images, the location of faults can be monitored and email reminders can be sent to engineers. Copyright © 2025 Inderscience Enterprises Ltd.

关键词： MATLAB

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A High-Sensitivity Microwave Sensor with Split-Ring Resonator Structure for Force and Bending Measurement

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IEEE Sensors Journal 2025年第12期25卷 21312-21321页

作者： Zhang, Zheyuan Nie, Bangbang Qiu, Jingjiang Peng, Wei Li, Shijiao Hao, Yilin Zhai, Ming Hu, Yifan Zhu, Mingfu Xi, Rui Wei, Ronghan Zhengzhou University School of Mechanics and Safety Engineering Zhengzhou450001 China Advanced Intelligent Manufacturing Lab Nano Opto-mechatronics & Biomedical Engineering Lab Zhengzhou450001 China Zhengzhou University School of Mechanics and Safety Engineering Industrial Technology Research Institute Engineering Technology Research Center of Henan Province for MEMS Manufacturing and Applications Institute of Intelligent Sensing Zhengzhou450001 China

In the fields of biological and medical research, precise detection of microscale structural changes is crucial. This paper presents a microwave sensor based on a microstrip line-coupled split-ring resonator structure for detecting structural bending changes and force conditions. The sensor is composed of Flame-Retardant 4（FR4） epoxy resin, copper foil, and an organic protective layer, with a resonant frequency of 3.60801 GHz. Detection of bending and microforces is achieved through the shift in resonant frequency. When the bending angle is between 0.1° and 1°, the sensor's resonant frequency shift range is from 3.60771 GHz to 3.60280 GHz;when the bending angle is between 5° and 90°, the resonant frequency shift range is from 3.60801 GHz to 3.60126 GHz, with a sensitivity of 74.916 kHz/°. Additionally, the sensor can measure forces in the range of 0 to 20 N, and for microforces within the range of 0.1 mN to 1 mN, the resonant frequency shift range is from 3.56256 GHz to 3.56219 GHz, with a sensitivity of 372 Hz/μN. The sensor has the advantages of high resolution, high sensitivity, and a broad measurement range. Validated by pulse measurement, it successfully measured the wrist arterial pulse force of approximately 1.5 mN, providing a new perspective for the fields of biological and medical monitoring. © 2001-2012 IEEE.

关键词： Microwave sensors

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Critical review of metal-ceramic composites fabricated through additive manufacturing for extreme condition applications

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Mechanics of Advanced Materials and Structures 2025年第10期32卷 2153-2180页

作者： Bhat, Chinmai Jiang, Cho-Pei Shan Romario, Yulius Paral, Sandeep Kumar Toyserkani, Ehsan High Value Biomaterials Research and Commercialization Center National Taipei University of Technology Taipei Taiwan Department of Mechanical Engineering National Taipei University of Technology Taipei Taiwan Graduate Institute of Manufacturing Technology National Taipei University of Technology Taipei Taiwan Taiwan High Speed 3D Printing Research Center National Taiwan University of Science and Technology Taipei Taiwan Department of Mechanical Engineering National Taiwan University of Science and Technology Taipei Taiwan Multi-Scale Additive Manufacturing Laboratory Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo Canada

Metal-Ceramic composites are a special class of materials, including elements as matrix and reinforcements. These composites, especially metal matrix composites, are of great significance in several high-end engineering applications due to their tunable conductivity, strength, and toughness. This review paper summarizes studies carried out to fabricate metal-ceramic composites by additive manufacturing. Various metal matrix composites such as titanium matrix composites, cobalt matrix composites, iron matrix composites, nickel matrix composites, and aluminum matrix composites are elaborated in detail. The paper provides an in-depth analysis of applications, trends, opportunities, and outlook for additive manufacturing of Metal-Ceramic composites. © 2024 Taylor & Francis Group, LLC.

关键词： 3D printing

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Superior high-temperature wear resistance of an Ir-Ta-Ni-Nb bulk metallic glass

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Journal of Materials Science & technology 2023年第27期158卷 121-132页

作者： Fei Sun Shengtao Deng Jianan Fu Jiahua Zhu Dandan Liang Pengfei Wang Hang Zhao Feng Gong Jiang Ma Yanhui Liu Jun Shen Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Southern University of Science and Technology Shenzhen 518055China Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment Shanghai Institute of TechnologyShanghai 201418China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Wear resistance is a critical consideration in engineering *** this study,we demonstrated an Ir-Ta-Ni-Nb bulk metallic glass(BMG)with outstanding high-temperature wear resistance and revealed its promising applications in extreme *** wear behavior and mechanism were systemati-cally investigated from room temperature(RT)to 750℃.The results show that the wear rate increases from∼2.65×10^(-6)mm^(3)N^(-1)m^(-1)to∼10.56×10^(-6)mm^(3)N^(-1)m^(-1)in the temperature span RT to 400℃,following abrasive wear and flash temperature-induced oxidative wear during the ***,at the higher temperature of 600℃,further heating due to frictional heat leads to a softening of the wear surface,resulting in a maximum wear rate of∼20.99×10^(-6)mm^(3)N^(-1)m^(-1)under softness-driven abrasive wear as well as oxidative ***,the wear resistance at an even higher temperature of 750℃shows a paradoxical improvement of∼7.08×10^(-6)mm^(3)N^(-1)m^(-1),which is attributed to the formation of an oxide layer with a thickness of several microns,avoiding violent wear of *** re-sults demonstrate the unreported outstanding high-temperature wear resistance of the Ir-Ta-Ni-Nb BMG,especially its excellent capability to resist wear at 750℃,leading to the promising applications of BMG in the fields of aerospace,metallurgy,and nuclear industries.

关键词： High-temperature alloy Superior wear resistance Wear mechanisms Bulk metallic glass

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Experimental and Simulation Approach;Investigation Effect of Axial Feed Rate to the Cutting Force in Dimple Milling Using Ball End Mill Tool 6th

Experimental and Simulation Approach;Investigation Effect of...

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6th Asia Pacific Conference on manufacturing System and the 5th International manufacturing Engineering Conference, APCOMS-IMEC 2022

作者： Shaharudin, M.A.H. Yusoff, A. Razlan Faculty of Manufacturing and Mechatronics Engineering Technology Universiti Malaysia Pahang Pahang Pekan26060 Malaysia Center for Advanced Industrial Technology Universiti Malaysia Pahang Pahang Pekan26060 Malaysia

ISBN: (纸本)9789819912445

A recent study indicated that the dimple has potential to improve the parts performance in a way of minimizing friction on a sliding mechanical component. Despite outnumbered dimple fabrication methods, milling process is considered as the versatile process that could produce various dimple profile with complex shape and the process is extremely dependent on the process variable such as machining parameters and cutting tool condition. The present research work aiming to study the effect of the milling machining parameters which is the axial feed rate and tool diameter to the cutting force by means of experimental work and finite element analysis (FEA). The concave dimple profile is machined at different axial feed rate to a flat Al6061 specimen using ball end mill attached to 3-axis CNC milling machine and the cutting force captured by KISTLER force dynamometer and the results will be compared with the FEA results. Based on the results, shows that cutting force increased directly proportional with the increasing plunging feed rates and tool diameters. The investigation work has successfully characterized the influence of studied milling parameters to the cutting forces and the research work will be continued further on the incline milling technique and micro size ball end mill. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2023.

关键词： Finite element method

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Strong absorption in ultra-wide band by surface nano engineering of metallic glass

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Fundamental Research 2025年第1期5卷 307-314页

作者： Jianan Fu Xin Li Zhen Li Fei Sun Wenxin Wen Jinlai Zhao Wenqing Ruan Shuai Ren Zhenxuan Zhang Xiong Liang Jiang Ma Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen 518060China

Broadband light absorption is important for applications such as infrared detectors,solar energy collectors,and photothermal *** propose a facile and common strategy to fabricate light absorbers with strong ultra-wideband *** to their excellent thermoplastic forming ability,metallic glasses could be patterned into finely arranged nanowire arrays,which show extremely low reflectivity(∼0.6%)in the visible and near-infrared regimes,and a low reflectivity(∼15%)in the mid-infrared regime as caused by multiscale nano spacing,multiple reflections,and plasmonic *** strong absorption at surfaces with nanowires provides excellent photothermal conversion *** photothermal properties show that a surface with nanowires can be rapidly heated up to∼160°C at a rate of 28.75°C/s,which is 30 times higher than smooth ***,a surface with nanowires shows a high photothermal conversion efficiency(η_(PT)=56.36%).The fabricated metallic glass absorbers exhibit adaptability as they can be easily formed into various complex shapes and meet the requirements under harsh *** outcomes of our research open the door to manufacturing high-performance absorbers for applications in photothermal electric power generation,desalination,and photodetectors.

关键词： Metallic glass Nanoforming Ultra-wideband absorption Photothermal properties Thermoplastic forming

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Experimental Study on Heat Storage Properties Comparison of Paraffin/Metal Foams Phase Change Material Composites

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Journal of Thermal Science 2024年第2期33卷 469-478页

作者： Waqar AHMED Abid HUSSAIN Hanzla SHAHID Imran ALI Hafiz Muhammad ALI Department of Mechanical Engineering University of Engineering and TechnologyTaxila47080Pakistan Department of Mechanical Engineering Institute of Space TechnologyIslamabadPakistan Department of Mechanical Mechatronics and Manufacturing EngineeringUniversity of Engineering and Technology LahoreFaisalabad CampusPunjabPakistan Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Renewable Energy and Power Systems(IRC-REPS) King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

Heat storage properties of phase change materials(PCMs) are essential characteristics that perform a key role in thermal heat energy storage *** thermal properties of PCMs can be improved by developing metal foam/PCM *** addition of metal foam in PCMs has a significant effect on the thermal characteristics of *** this paper,the heat storage properties of two different metal foam/PCM composites were experimentally *** behavior of paraffin in metal foam(copper and iron-nickel)/paraffin composites concerning pure paraffin at a constant heat flux of 1000 W/m^(2) in three directions simultaneously(x,y,and z) was *** was infiltrated into copper and iron-nickel foams to develop composite materials which resulted in enhancing the thermal conductivity of the paraffin.A comparative analysis is made on the heat storage properties of paraffin in copper and iron-nickel foams/paraffin *** temperature distribution during the phase transition process is experimentally *** comparison indicates that temperature uniformity in copper foam/paraffin composite is better than in iron-nickel foam/paraffin composite and pure paraffin at the same heat *** results show that at heat flux of 1000 W/m^(2),the heat storage time for copper foam/paraffin composite is 20.63% of that of iron-nickel foam/paraffin composite.

关键词： heat storage capacity paraffin/metal foam composite temperature uniformity heat storage rate phase transition process

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