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Bayesian inference-based wear prediction method for plain bearings under stationary mixed-friction conditions

Friction 2024年第6期12卷 1272-1282页

作者： Florian KÖNIG Florian WIRSING Georg JACOBS Rui HE Zhigang TIAN Ming J.ZUO Institute for Machine Elements and Systems Engineering RWTH Aachen UniversityAachen 52062Germany Department of Mechanical Engineering University of AlbertaEdmonton T6G1H9Canada Qingdao International Academician Park Research Institute Qingdao 266000China

This study introduces a method to predict the remaining useful life(RUL)of plain bearings operating under stationary,wear-critical *** this method,the transient wear data of a coupled elastohydrodynamic lubrication(mixed-EHL)and wear simulation approach is used to parametrize a statistical,linear degradation *** method incorporates Bayesian inference to update the linear degradation model throughout the runtime and thereby consider the transient,system-dependent wear progression within the RUL prediction.A case study is used to show the suitability of the proposed *** results show that the method can be applied to three distinct types of post-wearing-in behavior:wearing-in with subsequent hydrodynamic,stationary wear,and progressive wear *** hydrodynamic operation leads to an infinite lifetime,the method is successfully applied to predict RUL in cases with stationary and progressive wear.

关键词： plain bearings wear modeling remaining useful life prediction Bayesian inference

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Single-Electrode Electrostatic Repulsion Phenomenon for Remote Actuation and Manipulation

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Research 2025年第1期2024卷 333-345页

作者： Wei Tang Dong Yan Kecheng Qin Xinyu Guo Yiding Zhong Huxiu Xu Huayong Yang Jun Zou State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhouChina School of Mechanical Engineering Zhejiang UniversityHangzhouChina Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhouChina

One of the fundamental principles of electrostatics is that an uncharged object will be attracted to a charged object through electrostatic induction as the two approaches one *** refer to the charged object as a single electrode and examine the scenario where a positive voltage is *** of electrostatic induction phenomenon,single-electrode electrostatics only generates electrostatic attraction ***,we discover that single-electrode electrostatics can generate electrostatic repulsion forces and define this new phenomenon as single-electrode electrostatic repulsion *** investigate the fundamental electrostatic phenomena,giving a curve of electrostatic force versus voltage and then defining 3 *** actuation and manipulation are essential technologies that are of enormous concern,with tweezers playing an important *** tweezers designed on the basis of external fields of optics,acoustics,and magnetism can be used for remote actuation and manipulation,but some inherent drawbacks still *** would benefit greatly from our discovery in *** the basis of this discovery,we propose the concept of electrostatic tweezers,which can achieve noncontact and remote actuation and *** characterizations and successful applications in metamaterials,robots,and manipulating objects demonstrated that electrostatic tweezers can produce large deformation rates(>6,000%),fast actuation(>100 Hz),and remote manipulating distance(~15 cm)and have the advantages of simple device structure,easy control,lightweight,no dielectric breakdown,and low *** work may deepen people's understanding of single-electrode electrostatics and opens new opportunities for remote actuation and manipulation.

关键词： electrostatic induction remote actuation single electrode single electrode electrostatics charged object electrostatic repulsion

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Production and Study of Microstructure and mechanical Characteristics of Al7075-Boron Carbide Composites for Automotive Applications

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Journal of The Institution of Engineers (India): Series D 2024年 1-10页

作者： Venugopal, M.M. Avilasha, B.G. Koti, Vishwanath Girisha, L. Rakesh, M. Shashidhara, L.C. Bhople, Narendra Rameshwar Hemanth Raju, T. Udayashankar, S. Aeronautical Engineering Department Nitte Meenakshi Institute of Technology Karnataka Bengaluru560064 India Mechanical Engineering Department Dayananda Sagar College of Engineering Karnataka Bangalore560078 India Mechanical Engineering Department M S Ramaiah Institute of Technology Karnataka Bangalore560054 India Mechanical Engineering Department PES Institute of Technology and Management Karnataka Shivamogga577204 India Robotics and Artificial Intelligence Department Dayananda Sagar College of Engineering Karnataka Bangalore560078 India Mechanical Engineering Department Dayananda Sagar University Karnataka Ramanagara Bengaluru562112 India Mechanical Engineering Department Dr. D.Y Patil Institute of Technology Maharashtra Pune411018 India Mechanical Engineering Department New Horizon College of Engineering Karnataka Bangalore560103 India Department of Mechanical Engineering VTU Karnataka Belgaum590018 India

The excellent strength-to-weight ratio of aluminium alloys lead them to introduce to a large number of industries like engineering, defence and automotive. Much research has been suggested for the extensive use of Al7075 aluminum alloy in automobile sectors. The purpose of the research is to fabricate composites using Boron Carbide and Al7075 matrix composites by stir casting technique. The Al7075 matrix was reinforced by B4C particles in 1, 3, 5 and 7 weight ratios. This study used microstructure analysis and tensile testing among other experiments to measure the properties of composite specimens. The microstructure of the composites has been studied with scanning electron microscopy. B4C particles were found to be homogeneously dispersed in the entire Aluminium matrix. The results of this study indicate that the UTS of the composites that were manufactured improved in relation to the amount of B4C present. The Al7075-B4C composite shows the maximum UTS of 134.33 N/mm2 with B4C addition at 5%. It was established that the addition of B4C resulted in a reduction in percentage elongation. Adding B4C particles to the composites also increases their yield strength. With only 5 wt. % B4C, the highest yield strength of 117.25 N/mm2 can be attained among all tested compositions for the Al7075-B4C composite. Detailed examinations by SEM analysis of the fracture tension face of the composite material demonstrated that it was inherently brittle. © The Institution of Engineers (India) 2024.

关键词： Tensile testing

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Inflatable Metamorphic Origami

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Research 2023年第2期6卷 53-63页

作者： Sen Wang Peng Yan Hailin Huang Ning Zhang Bing Li School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518052P.R.China Guangdong Provincial Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Harbin Institute of TechnologyShenzhen 518052P.R.China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001P.R.China

This study created a new type of inflatable metamorphic origami that has the advantage of being a highly simplified deployable system capable of realizing multiple sequential motion patterns with a monolithic actuation.

关键词： simplified lata system

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Investigation on energy, economic, and environmental aspects of double-pass solar air heater

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Environmental Science and Pollution Research 2024年第27期31卷 39406-39420页

作者： Vijayakumar, Rajendran Kumar, Ramalingam Vignesh Madhu, Petchimuthu Department of Mechanical Engineering National Engineering College Tamil Nadu Kovilpatti India Department of Mechanical Engineering Karpagam College of Engineering Coimbatore India Centre for Nonlinear Systems Chennai Institute of Technology Tamil Nadu Chennai600069 India

Numerous research studies have found that a double-pass solar air heater (DPSAH) performs better than a single-pass solar air heater (SAH). This suggested study aims to evaluate the performance of a DPSAH setup in Southern Tamil Nadu, India. Several artificial roughness features have been incorporated into the solar black-coated absorber plate for this examination. Broken ribs with semi-circular and semi-polygonal shapes are used and explicitly tested on the absorber plate. Next, the efficiency of these rib designs is contrasted with a typical flat plate DPSAH. These studies also employ three different mass flow rates (0.01 kg/s, 0.02 kg/s, and 0.03 kg/s), enabling a thorough assessment of the DPSAH system’s performance at each rate. These studies’ findings demonstrate that adding artificial roughness to the solar collector plate has a beneficial effect on the turbulence of fluid flows. As a result, this innovation increases the double-pass solar air heater’s (DPSAH) heat transfer rate. It is noteworthy that compared to the DPSAH with flat plates, both rib designs perform better. It is important to remember that the semi-polygonal ribs function better than the semi-circular ones. The average efficiency values for the semi-polygonal rib structure are 17.1%, 18.7%, and 19.1% greater than those seen for flat plates. These efficiency values are additionally 4.4%, 7.4%, and 8.7% higher than those attained with the semi-circular rib topologies at flow rates of 0.01 kg/s, 0.02 kg/s, and 0.03 kg/s, respectively. The study goes into considerable detail on how particular rib patterns can be advantageous economically and environmentally. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Heating equipment

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On the Use of Tension Transition Zones for Kinematic and Compliance Performance Analysis of Wire-Actuated Continuum Robots

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Journal of Mechanisms and robotics 2025年第6期17卷 061013页

作者： Shihora, Neel Lawson, Jared Moubarak, Paul Reese, Maximilian Wang, Long Simaan, Nabil Department of Mechanical Engineering Vanderbilt University NashvilleTN37235 United States Robotics and Digital Solutions Johnson & Johnson CincinnatiOH45242 United States Robotics and Digital Solutions Johnson & Johnson Santa ClaraCA95054 United States Department of Mechanical Engineering Stevens Institute of Technology HobokenNJ07030 United States

Wire-actuated/tendon-actuated mechanisms suffer from discontinuity in their performance measures stemming from the limitation of unilateral actuation due to tendon actuation (pull-only actuation). Using traditional Jacobian-based performance measures ignores these limitations and can underestimate the expected position/orientation (pose) uncertainty for a given design. In this paper, we put forth the notion of wire-tension transition zones, and we illustrate how these tension transition zones can be used to modify the definition of the traditional Jacobian when calculating the expected robot performance in terms of dexterity, end-effector pose uncertainty and compliance. We use wire-actuated continuum robots as an illustrative robot architecture. We compare the expected performance of three-wire versus four-wire designs while considering somewhat realistic design parameters drawn from surgical robotics as an application domain. The results of our simulation studies emphasize the importance of carefully using the reduced Jacobin with tension transition zones to capture the performance measure discontinuities due to wires/tendons going slack. Furthermore, the results show that the traditional approach underestimates the uncertainty in the position of the end-effector by as much as 50% (effects of joint-level uncertainty) and 206% (compliance performance analysis) in the case of a three-wire design alternative. We believe that this contribution supports medical robotic system designers in architecture selection and comparative design performance analysis while avoiding unpleasant surprises that would otherwise be encountered if traditional performance measures were used. Copyright © 2025 by ASME;reuse license CC-BY 4.0.

关键词： End effectors

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mechanical and Tribological Properties of CrCN, CrAlN, and CrAlCN Coatings Deposited on Tungsten Carbide Substrates by High-Power Impulse Magnetron Sputtering Technology

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Journal of Materials engineering and Performance 2024年第24期33卷 14495-14512页

作者： Kao, W.H. Su, Y.L. Zhang, H.Y. Department of Automation Engineering and Institute of Mechatronoptic Systems Chienkuo Technology University Changhua Taiwan Department of Mechanical Engineering National Cheng Kung University Tainan Taiwan

CrCN, CrAlN, and CrAlCN series coatings were deposited on WC substrates using a high-power impulse magnetron sputtering (HiPIMS) system with various nitrogen, aluminum, and carbon flow rates. The effects of the aluminum, nitrogen, and carbon contents on the microstructures, mechanical properties, and tribological properties of the coatings were systematically explored. The results showed that the CrC5N30, CrAl150N30, and CrAl150C5N30 coatings exhibited the best mechanical and tribological properties within their respective series. Among all the coatings, the CrAl150C5N30 coating, with the lowest Al content of 2.4 at.%, showed the highest hardness (46.6 GPa) and adhesion strength (Lc2 > 100 N) and the best tribological performance. Notably, the CrAl150C5N30 coating demonstrated a better wear resistance than the uncoated WC substrate, thereby indicating its potential as an effective coating material for the protection of WC substrates and cutting tools in industrial practice. © ASM International 2023.

关键词： Chromium compounds

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mechanical Properties Inside Origami-Inspired Structures: An Overview

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Applied Mechanics Reviews 2025年第1期77卷 011001页

作者： Yan, Peng Huang, Hailin Meloni, Marco Li, Bing Cai, Jianguo Department of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen518052 China Harbin Institute of Technology Shenzhen518052 China Key Laboratory of C & PC Structures of Ministry of Education National Prestress Engineering Research Center Southeast University Nanjing211189 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China Guangdong Provincial Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Harbin Institute of Technology Shenzhen518052 China Key University Laboratory of Mechanism Machine Theory and Intelligent Unmanned Systems of Guangdong Habin Institute of Technology Shenzhen518052 China

In recent decades, origami has transitioned from a traditional art form into a systematic field of scientific inquiry, characterized by attributes such as high foldability, lightweight frameworks, diverse deformation modes, and limited degrees-of-freedom. Despite the abundant literature on smart materials, actuation methods, design principles, and manufacturing techniques, comprehensive reviews focusing on the mechanical properties of origami-inspired structures are relatively rare and unsystematic. This review aims to fill this void by analyzing and summarizing the significant studies conducted on the mechanical properties of origami-inspired structures from 2013 to 2023. We begin with an overview that includes essential definitions of origami, classical origami patterns, and their associated tessellated or stacked structures. Following this, we delve into the principal dynamic modeling method for origami and conduct an in-depth analysis of the key mechanical properties of origami-inspired structures. These properties include tunable stiffness, bistability and multistability, metamechanical properties demonstrated by origami-based metamaterials, and bio-inspired mechanical properties. Finally, we conclude with a comprehensive summary that discusses the current challenges and future directions in the field of origami-inspired structures. Our review provides a thorough synthesis of both the mechanical properties and practical applications of origami-inspired structures, aiming to serve as a reference and stimulate further research. © 2025 American Society of mechanical Engineers (ASME). All rights reserved.

关键词： Degrees of freedom (mechanics)

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Guest Editorial Special Issue on Industrial Big Data and Artificial Intelligence-Driven Intelligent Perception, Maintenance, and Decision Optimization in Industrial systems

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Computers, Materials & Continua 2025年第2期82卷 3609-3613页

作者： Jipu Li Haidong Shao Yun Kong Zhuyun Chen Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong KongChina College of Mechanical and Vehicle Engineering Hunan UniversityChangsha410082China School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510006China

1 Introduction In recent years,the rapid development of industrial big data and artificial intelligence(AI)technologies has revolutionized the industrial *** systems,such as manufacturing,energy,transportation,and logistics,have become increasingly complex,generating vast amounts of data[1–3].These big data encompass a wide range of data sources,including sensor data,production logs,and maintenance records,which hold valuable insights[4–6].Moreover,machine learning-based AI techniques can be applied to extract meaningful insights from this big data[7].

关键词： meaningful generating artificial

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A Tensegrity Hybrid Mobile Robot with mechanical Impact Resistance 50

A Tensegrity Hybrid Mobile Robot with Mechanical Impact Resi...

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50th Annual Conference of the IEEE Industrial Electronics Society, IECON 2024

作者： Filimonov, Daniil Zhakataev, Altay Varol, Huseyin Atakan Robotics Engineering SEDS Nazarbayev University Astana Kazakhstan Mechanical Engineering SEDS Nazarbayev University Astana Kazakhstan Institute of Smart Systems and Artificial Intelligence Nazarbayev University Astana Kazakhstan

ISBN: (纸本)9781665464543

In this work, we present a hybrid mobile robot with legged and wheeled locomotion modes and tensegrity components. Our work uniquely integrates classical robot structures with tensegrities to create a lightweight robot capable of resisting fall impacts and moving efficiently. After describing the mechanical and embedded system implementation of the robot in detail, we present a set of experiments to demonstrate the efficacy of our robot. Specifically, we dropped the robot from different heights and conducted cost of transport measurements for wheeled and legged modes at different speeds. The findings demonstrate that the use of tensegrity structures could be beneficial in terms of impact resistance and in different challenging applications, while double-type locomotion system could serve for more efficient locomotion and power consumption. © 2024 IEEE.

关键词： Microrobots

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