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

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Ensemble Learning for Estimating Remaining Useful Life: Incorporating Linear, KNN, and Gaussian Process Regression 1

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7th International Workshop on Autonomous Remanufacturing (IWAR)

作者： Rezazadeh, Nima Perfetto, Donato De Luca, Alessandro Caputo, Francesco Univ Campania Luigi Vanvitelli Dept Engn I-81031 Aversa Italy

ISBN: (数字)9783031526497

ISBN: (纸本)9783031526480;9783031526497

Assessing the remaining useful life (RUL) of components is essential for decision-makers in various industries, including manufacturing, transportation, and aerospace. By providing a reliable estimation of how long a part can continue to operate effectively, RUL assessment can inform decisions regarding maintenance, repair, or replacement of the component. To develop a technique for estimating the RUL of a system that is both highly accurate and less time-consuming than current methods, firstly, using the principal component analysis (PCA) manner, features were extracted in a reduced format;then, a hybrid model, i.e., an ensemble model that combines linear, k-nearest neighbors (KNN), and Gaussian process regression (GPR) through weighted averages, was designed. The well-known C-MAPSS dataset from NASA was employed to evaluate the performance of the model. To optimize the model's performance, an optimization procedure, i.e., constrained nonlinear multivariable was applied to identify the tuned weight in the ensemble learning that minimized the root-mean-square error (RMSE) value. Findings indicated that the optimized hybrid model outperformed the linear, KNN, and GPR models separately, as well as many of the prior investigations dealing with the same dataset, as evidenced by its lower RMSE value and the execution time.

关键词： RUL Linear KNN Gaussian process Ensemble model Optimization

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Optimizing Product Lifecycle Management with Omnichannel Strategies, Social Media Insights, and Extended Producer Responsibility: A Case Study on Efficient Plastic Waste Recycling 1

引用

33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Mohammadian, Noushin Uygun, Yilmaz Valilai, Omid Fatahi Constructor Univ Sch Business Social & Decis Sci Campus Ring 1 D-28759 Bremen Germany

ISBN: (数字)9783031744853

ISBN: (纸本)9783031744846;9783031744853

In today's dynamic business environment, effective Product Lifecycle Management (PLM) is crucial for maintaining market competitiveness. Traditional PLM faces challenges related to product quality, design, recycling, and marketing delays, resulting in lost sales, order backlog, increasing pollutant and environmental impacts. This paper proposes a contemporary approach by integrating Extended Producer Responsibility (EPR) into the PLM cycle, focusing on the recycling phase to address environmental concerns, particularly plastic waste. The study evaluates the impact of incorporating Omnichannel (OC) strategies and social media insights into the PLM framework. OC strategies foster collaboration among stakeholders, addressing challenges associated with lost sales and order backlog and social responsibility concerns. Social media analytics provide valuable customer insights, enabling prompt issue identification and resolution. The research compares a system using traditional PLM methods against one incorporating EPR and OC strategies with system dynamics approach. It aims to demonstrate howthis integrated approach enhances awareness, encourages collaboration, and streamlines plastic waste collection. The findings emphasize the potential to improve environmental sustainability, operational efficiency, and market competitiveness. This paper advocates for a sustainable PLM framework, offering insights to businesses navigating environmental responsibility, customer engagement, and operational excellence.

关键词： Product Lifecycle management (PLM) Social Media analytics Omnichannel Strategy Extended Producer Responsibility (EPR)

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Towards Lean Supply Chains: Case Studies on Organizational Interaction and Trust Relationship of Taiwan Machinery Industry 33rd

Towards Lean Supply Chains: Case Studies on Organizational I...

引用

33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Lo, Tzu-Han Wang, Lu-Mei Liu, Ren-Jye Tunghai Univ Taichung Taiwan Fengchia Univ Taichung Taiwan

ISBN: (纸本)9783031744815;9783031744822

When demand fluctuates rapidly and significantly, manufacturers and their supply chain partners address market challenges by establishing resilient lean supply chains with lean production mechanisms. This study explores the impact of organizational interaction and trust establishment on the construction of lean supply chains. Data collection and semi-structured interviews from Taiwanese fitness equipment manufacturer REXON and its 22 suppliers identify four trust and interaction types of supply chain by demand information sharing level and organization interaction dependency. The four trust and interaction types are Contractual Trust, Learning-based Trust, Relational Trust, and Competence-based Trust, which have applicable conditions and context. From the 22 suppliers' case studies, we find the representative firms for each type and discover how organizational interaction factors aid in building lean supply chains. The theoretical framework developed in this study can used for analyzing the supplier's trust relation and feedback to manufacturers, and we hope to make practical contributions to the lean supply chain establishment.

关键词： Lean Production Supply Chain Management Trust Relationship Information Sharing Network Dependence

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Non-destructive Crack Detection Methodologies in Green Compacts: An Overview 32nd

Non-destructive Crack Detection Methodologies in Green Compa...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Mustafa, Sameen Peer, Angelika Concli, Franco Free Univ Bozen Bolzano Fac Sci & Technol Bolzano Italy

ISBN: (纸本)9783031382406;9783031382413

Powder metallurgy (PM) is a rapidly growing field that offers a cost-effective way to manufacture complex-shaped metal components with superior properties compared to conventional manufacturing methods. However, PM involves the production of green compacts, which are prone to defects such as cracks, voids, and inclusions due to their fragile nature. These defects can compromise the final properties of the sintered components, resulting in high rejection rates and increased costs. Therefore, the need for reliable and efficient non-destructive testing (NDT) methods to detect defects in green compacts has become a focal point of research. Traditional methods for crack detection are based on destructive imaging techniques, where, polished sections of the specimen are observed under an optical microscope or scanning electron microscope. These methods, however, are time-consuming and cannot predict the initiation and likelihood of a crack in green compacts. In contrast, this study reviews different NDT methods proposed by researchers in the field to detect cracks and defects in green compacts. The discussed NDT methods include thermal imaging, X-Ray imaging, acoustic and ultrasound testing (UT), eddy current based testing (ECT), camera-based techniques, and simulations based on the Drucker-Prager Cap (DPC) model. We further review the usage of machine learning (ML) techniques for classification and decision-making. All methods are introduced along with a discussion of their limitations and merits.

关键词： Crack detection green compacts NDT

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Improvement of an Air-Conditioning Pipes Production Line for the Automotive Industry Using Lean and CONWIP Methodologies 32nd

Improvement of an Air-Conditioning Pipes Production Line for...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Isabel Laroca, A. Carlos Sa, J. Oliveira, Marisa Teresa Pereira, M. Polytech Porto Sch Engn Porto ISEP P-4200072 Porto Portugal Associate Lab Energy Transports & Aerosp LAETA IN Rua Dr Roberto Frias 400 P-4200465 Porto Portugal

ISBN: (纸本)9783031381645;9783031381652

The presented work is focused on applying continuous improvement tools to reduce waste and process variability throughout an air-conditioned pipe production line (PL), to determine the line's capacity and improve efficiency so that the desired productivity levels can be achieved. The line's processes were analyzed, together with the integrated application of continuous improvement and Lean tools to determine and improve its production capacity. Thus, a variability study was carried out, focused on balancing the PL, to reduce the main bottlenecks. After balancing, several improvements were performed in the line layout, improving the line efficiency, and reducing unnecessary employees' movements. Simultaneously, the Constant Work-In-Progress (CONWIP) methodology was implemented facilitating the management of the component's production before their entry into the PL. Other modifications were also implemented, both mechanically and in terms of documentation, to support production and contribute to the line's increase in efficiency, quality, and safety. The results obtained are relevant, with an increase in the capacity of the line and its productivity and efficiency, from 28.81% to 47.21%, and an increase of 18% in the Overall Equipment Effectiveness (OEE).

关键词： Lean Balancing Improvement CONWIP Efficiency OEE

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CPPS-3D: A Methodology to Support Cyber Physical Production Systems Design, Development and Deployment 32nd

CPPS-3D: A Methodology to Support Cyber Physical Production ...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Cunha, Pedro F. Pelixo, Dario Madeira, Rui Inst Politecn Setubal Escola Sup Tecnol Setubal Setubal Portugal

ISBN: (纸本)9783031382406;9783031382413

Cyber-Physical Production Systems Design, Development and Deployment methodology (CPPS-3D) is a systematic approach in assessing necessities, identifying gaps, and then designing, developing, and deploying solutions to fill such gaps. It aims to support enterprise's evolution into the industry 4.0 paradigms and technologies, promoting process improvements and enterprise competitiveness. The methodology considers the real context of the enterprise, in terms of its level of organization, competencies and technology. It is a two-phased sequentially stepped process to enable discussion, reflection or reasoning, decision-making and action-taking towards evolution. The first phase assesses an enterprise across its organizational, technological and human dimensions. The second phase establishes a sequence of tasks to successfully deploy solutions to fill previously identified gaps. The methodology was applied at a Portuguese enterprise with the development of a new visual management system on the shop-floor, capable of remote communications. This solution promoted faster decision-making, improved data availability and fostered a more dynamic workplace with enhanced reactivity to unexpected problems.

关键词： Production systems Cyber-physical system Problem-solving

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Numerical Simulation of Cavitation Characteristics on Stepped Spillway Due to Different Geometry Configuration 14th

Numerical Simulation of Cavitation Characteristics on Steppe...

引用

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

作者： Saeedrashed, Younis Sachdeva, Aryaman Singh, Srijna Benim, Ali Cemal Dusseldorf Univ Appl Sci Munsterstr 156 D-40476 Dusseldorf Germany Bennet Univ Dept Mech Engn Greater Noida India

ISBN: (纸本)9783031666087;9783031666094

In the present work, the occurrence of cavitation phenomenon is being investigated numerically on the steeply sloping stepped spillway for two different geometry configurations using ANSYS Fluent. The fluid flow is simulated using the URANS equations and Realizable k - epsilon turbulence model. To solve the cavitation, the homogeneous mixture model is used, and it is coupled with Zwart-Gerber-Belamri model to determine the vapor volume fraction. This numerical study is conducted based on experimental work in literature. The cavitation characteristics on two different geometries of stepped spillways which are LOH-I and LOH-II are investigated in terms of liquid volume fraction, pressure coefficient, velocity profiles, and velocity vectors at different cavitation index (sigma). More cavity has been observed at lower values of s for LOH-I due to sudden pressure drop at the inner side of the steps. The obtained results from both case studies show that the possible risk of damage in spillways due to the cavitation phenomenon should be taken into consideration near the location where the point of inception begin until the toe of the spillways.

关键词： Numerical simulation Stepped spillway ZGB model Cavitation index

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Development of a Large-Scale Artifact for a Wine Visitor Center Using Additive Manufacturing Technologies 32nd

Development of a Large-Scale Artifact for a Wine Visitor Cen...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Torres, Luis Mendonca, Rui Univ Porto Fac Belas Artes Porto Portugal ID Porto Portugal

ISBN: (纸本)9783031382406;9783031382413

As the wine industry grows increasingly competitive, professionals from different brands strive to differentiate their products and capture the attention of consumers to distinguish themselves in the market. To this end, a collaborative project was undertaken with INEGI (Institute of Science and Innovation in mechanical and Industrial engineering) to develop a captivating artifact by largescale 3D printing technology to be exhibited and provide a new experience for visitors at Pocas Visitor's Center, a wine company situated in Vila Nova de Gaia. This article reports on the design and development process, where it was possible contribute to the exploration of the technology and the best strategies were sought for constructing an effective, functional and esthetically pleasing product. For its production, polypropylene reinforced with 30% glass fiber was used, followed by post-processing and application of an electronic system, interactive and with sounds produced in collaboration with a Portuguese musician. During the practical tests, a study of the technology was made, the best strategies for the construction of the pieces were highlighted and the limitations too. As a result, an interactive large-scale 3D-printed artifact was developed to contribute to a more immersive experience at Pocas Visitor's Center.

关键词： Design Interaction Large-Scale 3D Printing Pocas Wine Product Development

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Enhancing Steer-by-Wire Systems with an Integrated E-Motor and MR-Brake Actuator - Feedback Control Strategy 16th

Enhancing Steer-by-Wire Systems with an Integrated E-Motor a...

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16th International Symposium on Advanced Vehicle Control

作者： Niegl, Matthias Hendewerk, Johannes Eckert, Matthias Mattlogg, Stefan Pfeffer, Peter MdynamiX AG Hessstr 89 D-80797 Munich Germany Munich Univ Appl Sci Dachauerstr 98b D-80335 Munich Germany INVENTUS Dev GmbH Montafonerstr 68 A-6771 St Anton Im Austria

ISBN: (纸本)9783031703942;9783031703928;9783031703911

This study introduces an innovative control strategy for a steer-by-wire (SbW) force feedback actuator, tailored for automotive use. The actuator integrates a direct drive electric motor and a magnetorheological brake (MR-brake) within a streamlined, compact design. This electric motor delivers torque essential for the desired steering feel and ensures swift responsiveness. Concurrently, the MR-brake, noted for its compactness and energy efficiency, contributes passive damping and robust end-stop torque capabilities. The synergistic use of these components allows for a smaller and more resource-efficient electric motor design. A critical aspect of this strategy is the implementation of a torque splitter, essential for replicating the steering feel associated with Electric Power Steering (EPS) systems. This splitter distributes the required feedback torque between MR-brake torque and e-motor torque, ensuring high fidelity and consistent stability across a range of vehicular dynamics and maneuvers. Notably, maintaining a subjectively satisfying steering feel under conditions where torque proportions vary between actuators presents a significant challenge. The proposed actuator design, with its focus on performance, safety, and reliability, is particularly well-suited for advanced SbW systems demanding high standards in these areas.

关键词： Steer-by-Wire Force Feedback Actuator Magnetorheological

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Waste to 3D Printing: A Systematic Literature Review 32nd

Waste to 3D Printing: A Systematic Literature Review

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Ferreira, Ines A. Carvalho, Helena NOVA Univ Lisbon NOVA Sch Sci & Technol UNIDEMI Dept Mech & Ind Engn Caparica Portugal Lab Associado Sistemas Inteligentes P-4800058 Guimaraes Portugal

ISBN: (纸本)9783031381645;9783031381652

Additive manufacturing is one of the most prominent technologies seen as an enabler for circular economy strategies, including the development of additive symbiotic networks. There is a gap in the literature regarding the understanding of how additive symbiotic networks can be developed, namely in identifying the wastes and by-products and additive manufacturing technologies that can be used to valorize these resources. This study aims to review the existing literature on the topics of industrial symbiosis and additive manufacturing. A sample of 83 documents was reached, with only 25 highlighting the potential for developing industrial symbiosis networks in the additive manufacturing context. Results show that the most used technologies to incorporate recycled materials included fused deposition modelling, fused filament fabrication and selective laser melting. Regarding waste or by-products exchanges, plastic polymers, biological wastes and metal powders are some of the most frequently exchanged materials. This makes evidence of the additive manufacturing industry's potential to develop additive symbiotic networks in which wastes and by-products from other industries may be used as material inputs for additive manufacturing processes and technologies.

关键词： Additive symbiotic networks Blockchain technology Supply chain structure case study

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