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检索条件"丛书名=Lecture Notes in Mechanical Engineering"

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Data-Driven Risk Assessment with Scenario Classification for Collision Avoidance in Left/Right Turn Across Path Conflicts 16th

Data-Driven Risk Assessment with Scenario Classification for...

引用

16th International Symposium on Advanced Vehicle Control

作者： Wang, Wei Raksincharoensak, Pongsathorn Henze, Roman Tokyo Univ Agr & Technol Dept Mech Syst Engn Tokyo 1848588 Japan Tech Univ Carolo Wilhelmina Braunschweig Braunschweig Germany

ISBN: (纸本)9783031703942;9783031703928;9783031703911

Traffic safety is one of the vital issues in developing autonomous and assisted driving systems. To achieve higher level of driving automation, it becomes necessary to have a reliable Risk Assessment (RA) method that not only responds to current traffic conditions but also anticipates future scenario propagation. Regardless of the driver intentions, traditional deterministic risk indicators like Time-To-Collision (TTC) have proven effective but fall short in addressing the inherent uncertainty in future propagation, especially under conflict scenarios influenced by interdependent decisions of traffic participants. Acceleration for Collision Avoidance (ACA) emerges as a flexible risk criterion adaptable to different collision-avoidance maneuvers. Focusing on the Left/Right Turn across path conflicts, this work aims to propose an innovative surrogate risk indicator for collision avoidance with the combination of ACA criteria and scenario classification using Hidden Markov Models (HMM). Based on a near-miss video database, we further train and evaluate the presented model, supplying interpretability and adaptability of risk assessment in complex conflict scenarios.

关键词： Advanced driver assistance systems Collision avoidance Risk assessment Surrogate safety indicator Near-miss database Hidden Markov Model

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Analysis of the Possibilities of Applying 3D Print Methods for the Needs of Ship-Building Industry 32nd

Analysis of the Possibilities of Applying 3D Print Methods f...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Jasinski, Krzysztof Chodnicki, Marek Bobrowski, Krzysztof Lipinski, Krzysztof Kluczyk, Marcin Szelezinski, Adam Gdynia Maritime Univ Ul Morska 81-87 PL-81225 Gdynia Poland Gdansk Univ Technol Ul Gabriela Narutowicza 11-12 PL-80233 Gdansk Poland Polish Naval Acad Ul Smidowicza 69 PL-81127 Gdynia Poland

ISBN: (纸本)9783031382406;9783031382413

Article presents the analysis of applying additive and hybrid manufacturing methods and its impact on dynamic stiffness of prepared samples. Dynamic analysis of the handle bracket specimens consisted in plotting the resonance curves and using these curves to estimate the dynamic stiffness of elements produced with additive manufacturing technology. Authors focused especially on 3D print in Fused DeposiotionModeling/Fused Filament Fabrication (FDM/FFF) technology to manufacture both new, fully functional components of ships and yachts and to produce spare parts in emergency conditions when there is a need of a temporary replacement of a damaged part (e.g. on-board of a ship during its voyage, to ensure that the part lasts until the ship reaches a shipyard or a port). This paper presents results of research conducted using a dynamic analysis of specimens in the form of a handle bracket and tests conducted within the scope of strength analysis of portholes spacers mounted below the ships water line.

关键词： Modal analysis hybrid machining dynamic stiffness porthole spacers handle bracket

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Analysis of Selected Surface Layer Properties After Ball Burnishing of Samples Cut with a Laser Parallel and Perpendicular to the Rolling Direction 8th

Analysis of Selected Surface Layer Properties After Ball Bur...

引用

8th International Scientific-Technical Conference (MANUFACTURING)

作者： Skoczylas, Agnieszka Matuszak, Jakub Ciecielag, Krzysztof Zaleski, Kazimierz Lublin Univ Technol Dept Prod Engn Fac Mech Engn Lublin Poland

ISBN: (纸本)9783031564659;9783031564635

Laser cutting is very often the first operation in the manufacture of machine components. However, due to their poor quality, the surface and edges often require finishing. In this study, ball burnishingwas used as a finishing method for machine elements. The study was conducted on samples of C45 unalloyed steel that were cut with a laser beam parallel (L-PA) and perpendicular (L-PE) to the rolling direction. The burnishing process was conducted using a mechanical pressure tool with a ball diameter of d(N) = 8 mm. The variable parameters were the burnishing force F= 300 divided by 930N and the burnishing feed f = 0.05 divided by 0.40 mm/rev. After ball burnishing the surface roughness in the entrance and the exit zone of the laser beam was reduced by 18% to 56% compared its value after laser cutting. For the samples cut perpendicular to the rolling direction, these changes were greater. However, after ball burnishing, the values of the Ra and Rt parameters for the L-PE samples were still higher than those of the L-PA samples. The use of ball burnishing led to an increase in the surface microhardness from 3% to 24%. The most favorable properties of the surface layer were obtained after burnishing conducted with f = 0.05 divided by 0.17 mm/rev and F = 720 N. The study demonstrated that the direction of laser cutting in relation to the direction of rolling affected on the condition of the surface layer.

关键词： laser cutting rolling direction ball burnishing surface roughness microhardness

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Cognitive Digital Twin Modeling of Robotic Disassembly Process 1

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7th International Workshop on Autonomous Remanufacturing (IWAR)

作者： Qi, Lei Yang, Hang Liu, Jiayi Xu, Wenjun Zhong, Yi Wuhan Univ Technol Sch Informat Engn Wuhan 430070 Peoples R China Wuhan Univ Technol Hubei Key Lab Broadband Wireless Commun & Sensor Wuhan 430070 Peoples R China

ISBN: (数字)9783031526497

ISBN: (纸本)9783031526480;9783031526497

With the increasing concern of recycling the end of life products, robotic disassembly is being paid much attention nowadays. Generally, there are many uncertainties in disassembly process, and these uncertainties should definitely be considered. Cognitive capability forming is useful to solve the uncertainties during the robotic disassembly process. In this paper, cognitive digital twin model of robot disassembly process is built, and its cognitive capability is validated. An ontology modeling-based method is proposed to achieve the cognitive capability of the digital twin. During the robotic disassembly process, the cognitive capability addresses uncertainties of different fasteners with similar product structure. In order to verify the proposed method, the case studies are conducted in robotic disassembly process of clutches, and results show that cognitive digital twin is able to resolve the uncertainties of product fasteners in the robot disassembly process and improved the success rate in disassembling the products with similar structure.

关键词： Cognitive digital twin Modeling Disassembly Industrial robots

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Effect of Laser Peening on Surface Morphology and Deformation Level of Additively Manufactured 316L Stainless Steel 3rd

Effect of Laser Peening on Surface Morphology and Deformatio...

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3rd International Conference on Advanced Surface Enhancement (INCASE)

作者： Mithal, Abeer Maharjan, Niroj Idapalapati, Sridhar Nanyang Technol Univ Sch Mech & Aerosp Engn 50 Nanyang Ave Singapore 639798 Singapore Agcy Sci Technol & Res Adv Remfg & Technol Ctr 3 Cleantech Loop Singapore 637143 Singapore

ISBN: (纸本)9789819986422;9789819986439

Laser peening (LSP) is a surface enhancement technology that utilizes a short-pulsed laser to improve the fatigue life of components. With the advent of additive manufacturing (AM), there has been an interest in studying LSP of AM parts. In this experimental work, we examine the effect of LSP on the microstructure and surface morphology of AM 316L stainless steel. LSP at moderate and extreme peak power densities of 7.86 and 17.68 GW/cm(2) respectively, was performed on a 316L steel sample fabricated by directed energy deposition (DED). The samples were characterized for their surface morphology and near-surface microstructure using a range of analytical techniques. The results indicate that all LSP conditions had no significant effect on the surface topography or oxide level. When no ablative coating was used, the surface residual stress was tensile whilst with coating the surface residual stress state was compressive. The plastic strain (as measured by EBSD) was not significantly different for all LSP conditions. The use of extremely high peak power density (17.68 GW/cm(2)) showed no significant increment in plastic strain, hardness or surface residual stress compared to moderate peak power density (7.86 GW/cm(2)) possibly due to the dielectric breakdown of water. The findings indicate that a very high peak power density does not necessarily translate to larger peening effects and may not be required for material processing.

关键词： Laser shock peening Directed energy deposition Surface enhancement Materials characterization EBSD

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Implementation of DL 101-D/2020 in a Service Building 32nd

Implementation of DL 101-D/2020 in a Service Building

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Almeida, Alvaro Silva, Jose Vaz, Paulo Araujo, Rui Serrano, Helena Inst Politecn Viseu Escola Super Tecnol Dept Mech Engn & Ind Management Viseu Portugal Inst Politecn Viseu CISeD Res Ctr Digital Serv Viseu Portugal

ISBN: (纸本)9783031381645;9783031381652

Energy efficiency and environment decarbonization are domains of growing concern. There is an emphasis in the energy rehabilitation of buildings and in the study and research of improvement measures aimed to make the building an NZEB (Nearly Zero Energy Building). The regulatory framework issued by the member states of the European Union, establish different objectives and provide methodologies for the calculation of energy performance, establishing minimum requirements for new buildings. This work addresses the implementation of the energy certification in a service building, applying the calculation methods to a case study. Improvement proposals are presented for the energy performance improvement that lead to a reduction in energy consumption. The purpose is to demonstrate that the proposed measures for the rational use of energy, outlined in the energy certificate, contribute to increased energy efficiency. These measures foster the reduction of energy consumption and consequently the reduction of greenhouse gases emissions.

关键词： Energy Efficiency Sustainability Energy Consumption Energy Certification

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Systematic Assessment of Roughness Effect on Flow Characteristics in Minichannels 14th

Systematic Assessment of Roughness Effect on Flow Characteri...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Pahlavanzadeh, Mohammadsadegh Rulik, Sebastian Wroblewski, Wlodzimierz Rusin, Krzysztof Silesian Tech Univ Dept Power Engn & Turbomachinery Gliwice Poland

ISBN: (纸本)9783031666087;9783031666094

Flow through minichannels is of major importance in many industrial applications. Submillimeter length scales of such domains and presence of roughness make the flow analysis a challenging task. In order to investigate friction factor in the minichannel, both numerical methods and in-house experiment are employed. First, flow over a rough flat plate is studied numerically to check the accuracy and performance of employed numerical models. Subsequently, flow in a minichannel with submillimeter height and different surface quality is studied. The test stand makes it possible to investigate the pressure drop in a wide range of Reynolds numbers. In the numerical simulations, equivalent sand-grain roughness is considered and implemented by an artificial increase in the turbulent viscosity on the wall based on this value. Good agreement between the numerical results and experimental data represents the accuracy of utilized models and methods. Roughness increases the friction factor in minichannels and this growth is more visible in higher Reynolds numbers and turbulent flows.

关键词： Minichannel Turbulence parameters Friction factor Turbulent viscosity

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A CFD Model to Simulate Thermal Mould-Filling and Solid-Liquid Phase Change During Aluminothermic Welding of Rails 14th

A CFD Model to Simulate Thermal Mould-Filling and Solid-Liqu...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Kewalramani, Ravi Govindram Riehl, Ingo Hantusch, Jan Fieback, Tobias TU Bergakad Freiberg Inst Thermal Engn Chair Tech Thermodynam Gustav Zeuner Str 7 D-09599 Freiberg Saxony Germany Elektro Thermit GmbH & Co KG Chemiestr 24 D-06132 Halle An Der Saale Saxony Anhalt Germany

ISBN: (纸本)9783031666087;9783031666094

The present work introduces a model to simulate the flow field inside the mould and predict the solid-liquid phase change during the mould-filling stage of the aluminothermic welding process. The volume of fluid method has been used to model the steel-air multiphase system, and the enthalpy-porosity technique has been adopted to predict the phase change. The multiphase model has been implemented in OpenFOAM((R)), a finite volume method based computational fluid dynamics program. The k - epsilon turbulence model has been extended to account for the phase change during the mould-filling stage. The numerical results enable a detailed understanding of the flow field and the shape of the melted rail profile within the mould after the completion of the mould-filling stage. Moreover, the predictions of the melted rail profiles within the mould are compared with those from the experiment, and a reasonable agreement has been observed.

关键词： Aluminothermic welding CFD Heat transfer OpenFOAM((R)) Solidification/melting Turbulence modelling Multiphase flows

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Development of Organisational Competitiveness Model Based on Relationship Between Entrepreneurship and Project Management 1

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33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Rehman, Shahroz Alaskari, Osama Ahmad, M. Munir Teesside Univ Sch Comp Engn & Digital Technol Middlesbrough Cleveland England

ISBN: (数字)9783031744853

ISBN: (纸本)9783031744846;9783031744853

Entrepreneurial orientation (EO) is a specific mindset of an entrepreneurial company, which has effect on both strategic processes and performance of company, and it is considered as a response to future market needs for achieving competitive advantages. Thus, it is important to understand the factors which have impact on project success. Therefore, the aim of this study is to develop and test a model in order to investigate the overall relationship between entrepreneurial orientation and project success by the moderating and mediating role of marketing orientation (MO) which will help in identifying the relationship between entrepreneurship (E) and project management (PM). This is quantitative research in which survey method has been used in the form of questionnaire to collect data from practitioners which includes Directors, Project managers, Project engineers, Analysts and Coordinators while the collected data was later treated through structural equation modeling. Hence, results showed that there is a positive relation between EO and project success however, marketing orientation successfully moderates this relation which shows that both EO and MO can positively contribute to success of projects and could have a particular relevance in renewable energy sector like other relevant sectors such as construction, service, and Information Technology (IT). Moreover, this study will contribute towards achieving a 2030 United Nations' goal of tackling climate change by significant reduction in Green House Gases (GHG).

关键词： Entrepreneurial orientation Marketing Orientation project success Renewable energy sector

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Advancing Human-Robot Interaction Using AI - A Large Language Model (LLM) Approach 1st

Advancing Human-Robot Interaction Using AI - A Large Languag...

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1st European Symposium on Artificial Intelligence in Manufacturing (ESAIM)

作者： Dimitropoulos, Nikos Papalexis, Pantelis Michalos, George Makris, Sotiris Univ Patras Lab Mfg Syst & Automat Patras 26504 Greece

ISBN: (纸本)9783031574955;9783031574962

Human-Robot Interaction (HRI) plays a crucial role towards enabling seamless collaboration between humans and robots, leading to increased productivity, efficiency, and safety in production processes. Robots equipped with advanced sensing capabilities can work alongside humans, performing repetitive and physically demanding tasks, while humans focus on more complex and strategic aspects of production. Several concepts have been presented so far involving a variety of h/w and information exchange means, like gestures, physical and virtual buttons and voice commands. The main drawback identified that limits the fluidity of the interaction is that the commands are pre-programmed and have to be memorized. This paper presents a framework to advance HRI in both execution and programming phases, through the use of AI, exploring large language models (LLMs), allowing humans to communicate in natural language. A reference use case is presented to validate the effectiveness of this approach.

关键词： human-robot interaction large language models manufacturing human augmentation

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