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

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A Data-Driven Framework for Tire Force Estimation of Distributed Electric-Drive Vehicles 16th

A Data-Driven Framework for Tire Force Estimation of Distrib...

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16th International Symposium on Advanced Vehicle Control

作者： Yen, Rujun Jiang, Kun Zhang, Bowei Miao, Jinyu Yang, Diange Tsinghua Univ Sch Vehicle & Mobil Beijing 100084 Peoples R China

ISBN: (纸本)9783031703942;9783031703928;9783031703911

In recent years, with the development of wheel-side motors and hub motors, distributed electric drive vehicles, gradually enter the electric vehicle *** force are often derived from rule-based model in the past. However, distributed electric drive vehicles have a higher degree of freedom put forward new control requirements. This puts forward higher requirements for the accuracy of the tire force model. Rule-based model cannot meet the requirements quite well. Because of this, our study established a tire force residual correction framework for distributed electric drive vehicles. The framework consists of a neural network model (MLP, MLP-seq, and MLP-mixer) and a physical rule-based model. The framework was proved in the study to output a more accurate force estimation which will help dynamic modeling and control tasks.

关键词： distributed electric drive vehicles tire force estimation neural network residual correction framework

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Cyclic Bending Behaviors of Extruded AZ31 Magnesium Alloy Beams 14th

Cyclic Bending Behaviors of Extruded AZ31 Magnesium Alloy Be...

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14th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM)

作者： Zhou, Kecheng Tang, Ding Li, Dayong Wang, Huamiao Shanghai Jiao Tong Univ State Key Lab Mech Syst & Vibrat Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Mat Genome Initiat Ctr Shanghai 200240 Peoples R China

ISBN: (纸本)9783031580086;9783031580062;9783031580055

Bending behavior holds significant importance, as it plays an unavoidable role in a variety of forming processes. Therefore, gaining insight into the cyclic bending mechanical behavior of magnesium (Mg) alloys is crucial for designing, fabricating, and ensuring the performance of end products. This study conducts cyclic bending simulations of an extruded AZ31 Mg alloy beam using crystal-plasticity-based methods. The study encompasses the macroscopic aspects of stress distribution and strain distribution, along with a detailed discussion of microscopic factors such as the relative activities of deformation mechanisms and twin volume fraction during cyclic bending. Different from conventional alloys with high crystal symmetry, the apparent the neutral layer shifting phenomena is observed in the extruded AZ31. The simulated results reveal that this distinct behavior is ascribed to the alternating twinning and detwinning mechanisms.

关键词： Magnesium alloy Crystal plasticity Cyclic bending Twinning-detwinning

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Disassembly Strategies for Remanufacturing: Experiences from a Learning Factory 7th

Disassembly Strategies for Remanufacturing: Experiences from...

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7th International Workshop on Autonomous Remanufacturing (IWAR)

作者： Coenen, Jenny Makkink, Hugo Zijderveld, Mirjam The Hague Univ Appl Sci The Hague Netherlands

ISBN: (纸本)9783031526480;9783031526497

This paper describes some explorations on the concept of disassemblability as an important circularity indicator for products because of its severe impact on reuse value. Although usefulness of the concept for determining disassembly strategies and for improving circular product design clearly shows in earlier studies, the link with Industry 4.0 (I4.0)-related process innovation is still underexposed. For further technical development of the field of remanufacturing, research is needed on tools & training for operators, diagnostics, disassembly/repair instructions and forms of operator support. This includes the use of IoT and cobots in remanufacturing lines for automatic disassembly, sorting and recognition methods;providing guidance for operators and reduction of change-over times. A prototype for a disassembly work cell for a mobile phone has been developed together with researchers and students. This includes the removal of screws by means of a cobot using both vision & the available info in the product's Bill-Of-Materials, the removal of covers, opening of snap fits and replacement of modules. This prototyping demonstrates that it is relatively easy to automate disassembly operations for an undamaged product, that has been designed with repairability in mind and for which product data and models are available. Process innovations like robotisation influence the disassemblability in a positive way, but current indicators like a Disassembly Index (DI) can't reflect this properly. This study therefore concludes with suggestions for an evaluation of disassemblability by looking at the interaction between product, process and resources in a coherent way.

关键词： Personnel training

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Influence of Flow Disturbing Grooves Underneath the Cowcatcher on Aerodynamic Noise Generated Around a High-Speed Train Bogie 14th

Influence of Flow Disturbing Grooves Underneath the Cowcatch...

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14th International Workshop on Railway Noise (IWRN)

作者： Zhu, J. Y. Wang, Y. Z. Cheng, G. D. Yuan, Y. Y. Lu, Y. H. Tongji Univ Inst Rail Transit Shanghai 201804 Peoples R China Shanghai Key Lab Vehicle Aerodynam & Vehicle Ther Shanghai 201804 Peoples R China

ISBN: (纸本)9789819978519;9789819978526

The influence of the flow disturbing grooves underneath a cowcatcher on the flow and aerodynamic noise performance around a high-speed train bogie is investigated based on acoustic analogy method. Results show that the parallel grooves set on the rear end of cowcatcher bottom surface, interfere with the forming and shedding of the large-scale vortices generated at the rear rim of cowcatcher as well as the leading edge of the bogie cavity where the flow separation and flow interaction between the wake and the geometries are mitigated. Thus, the wall pressure fluctuations on the solid surfaces of cowcatcher and bogie areas are decreased and the flow-induced noise is reduced. Based on the semi-anechoic wind tunnel experimental measurements on the scaled high-speed train nose car model with the flow disturbing method applied underneath the cowcatcher, it is found that the far-field noise at the location opposite to the bogie region is reduced around 0.5 dB(A) and the noise source area around the bogie cavity is decreased with the sound amplitude level reduced up to 1 dB(A) under 20 kHz. This demonstrates that the aerodynamic noise is reduced effectively and verifies the noise reduction effect calculated from the numerical simulation.

关键词： High-speed train Cowcatcher Aerodynamic noise Flow disturbing

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A Conceptual Framework for the Improvement of Robotic System Reliability Through Industry 4.0 32nd

A Conceptual Framework for the Improvement of Robotic System...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Mourtzis, Dimitris Tsoubou, Sofia Angelopoulos, John Univ Patras Dept Mech Engn & Aeronaut Lab Mfg Syst & Automat Rion 26504 Greece

ISBN: (纸本)9783031382406;9783031382413

In recent years, the traditional manufacturing industry has been affected by the advent of Industry 4.0. Robotic systems have become a standard tool in modern manufacturing, due to their unique characteristics, such as repeatability, precision, speed, and high payload. However, robotics manipulators suffer from low reliability. Low reliability increases the probability of disruption in manufacturing processes, maximizing in this way the downtime and the maintenance costs. Consequently, for complex systems, like robots which consist of a lot of interdependent components, with various failures, it is critical to develop effective reliability assessment techniques to ensure high performance. Until now, there are several reliability assessment methods, but they are mostly time-consuming and expert-knowledge-intensive processes. This research develops a model-based approach for the reliability calculation of a robotic cell pinpointing the simplifications that are taking into account. Furthermore, a data-driven approach is proposed with the aim to enhance the results of the model-based approach and to improve the reliability of the robotic system towards the new directions that Industry 4.0 technologies can offer, by predicting the Remaining Useful Life (RUL) of critical components, using real-time data, thanks to the Digital Twin (DT).

关键词： Reliability assessment Robots Digital Twin Industry 4.0 RUL

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Temporal and Frequency Analysis with Empirical Mode Decomposition for Vehicle Vibration Signals 16th

Temporal and Frequency Analysis with Empirical Mode Decompos...

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16th International Symposium on Advanced Vehicle Control

作者： Masuda, Makoto Shiiba, Taichi Bosch Corp Wheeler & Powersports Business Unit 2 Yokohama Kanagawa Japan Meiji Univ Dept Mech Engn Kawasaki Kanagawa Japan

ISBN: (纸本)9783031703942;9783031703928;9783031703911

This study presents the empirical mode decomposition method (EMD) for vehicle vibration and a correlation detection approach for input from road and vehicle body vibration using the Hilbert-Huang transform (HHT). Although the magnitude squared coherence is commonly used to examine the correlation of vehicle vibration with road input, it is not suitable for non-stationary vibration. On the other hand, the Hilbert-Huang transform (HHT) which consists of EMD and the Hilbert transform is proposed. This method is suitable for transient vibration analysis, while the drawbacks to intermittence signals are suggested. Vehicle vibration signals include intermittence signals in some cases. In this study, the masking EMD which adapts the mask signal to the amplitude of the target signal was applied to vehicle vibration to alleviate the drawbacks. By this method, the correlation analysis by HHT demonstrates higher temporal resolution compared to the continuous wavelet transform. Thus, it becomes possible to identify the components that caused vibrations at the moments when the passengers felt comfortable or uncomfortable, and to analyze the characteristics of the vibrations.

关键词： Hilbert-Huang transform Empirical Mode decomposition

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Feasibility Study of Using Nuclear Energy to Produce Hydrogen Fuel in Saudi Arabia

Feasibility Study of Using Nuclear Energy to Produce Hydroge...

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Saudi International Conference on Nuclear Power engineering (SCOPE)

作者： Alrushaid, Mogbil Albahrani, Seraj Bushafia, Mohammed Alkhalifa, Ali Alhamdi, Abdulwahab Yamani, Zain Shams, Afaque King Fahd Univ Petr & Minerals Chem Engn Dept Dhahran 31261 Saudi Arabia King Fahd Univ Petr & Minerals Mech Engn Dept Dhahran 31261 Saudi Arabia King Fahd Univ Petr & Minerals Interdisciplinary Res Ctr Hydrogen & Energy Stora Dhahran 31261 Saudi Arabia King Fahd Univ Petr & Minerals Interdisciplinary Res Ctr Ind Nucl Energy IRC INE Dhahran 31261 Saudi Arabia

ISBN: (纸本)9783031643613;9783031643620

Saudi Arabia has developed a plan to reach carbon neutrality following The Paris Agreement and hydrogen fuel is an essential part of that plan. It has also established its Saudi National Atomic Energy Project (SNAEP) and is looking towards adding nuclear power to the energy mix. This paper begins by exploring the energy landscape in Saudi Arabia. Furthermore, it elaborates on different methods to produce hydrogen, and specifically how nuclear energy can be utilized to produce hydrogen. The feasibility study provides an economic assessment that compares the operation cost of producing hydrogen using different technologies and energy sources. It was concluded that using nuclear energy in producing hydrogen gives the lowest levelized cost of hydrogen compared to other clean sources. Furthermore, it was found that implementing a high temperature electrolysis process that uses electricity from a nuclear power plant along with heat can lead to higher economic and technical efficiencies compared to other electrolysis processes because it uses 26% less electricity. With the construction of a nuclear power plant in Saudi Arabia, the country has the chance to build a hydrogen production infrastructure with advanced technologies that might greatly aid in optimizing its position as a worldwide energy leader.

关键词： Nuclear Energy Hydrogen Fuel Saudi Arabia Sustainable Energy Hydrogen Economy Feasibility Study

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Assessment of the Impact of Selected Segments of Road Transport on the Natural Environment Using LCA Analysis 1

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Piotrowska, Katarzyna Piasecka, Izabela Gola, Arkadiusz Kosicka, Ewelina Lublin Univ Technol Fac Mech Engn Dept Prod Computerisat & Robotisat Lublin Poland Bydgoszcz Univ Sci & Technol Fac Mech Engn Bydgoszcz Poland

ISBN: (数字)9783031564741

ISBN: (纸本)9783031564765;9783031564741

A natural consequence of implementing the assumptions of the sustainable transport is the minimization of the harmful impact that means of transport have on the natural environment. Therefore, it is extremely important to assess the impact of passenger cars on the environment - both conventional and alternatively driven. As part of the research work, the impact of selected segments of road transport on the environment was assessed using the Life Cycle Assessment LCA system analysis, covering the stages of production and operation, and taking into account technological changes and energy mixes in the time horizon until 2050. A key objective was to combine knowledge from the literature as well as data from manufacturers to propose a comprehensive methodology as well as further improve future research.

关键词： Life Cycle Assessment Environmental Impact Transport Sustainability

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Driver Analysis to Solve Dynamic Facility Layout Problems: A Literature Review 32nd

Driver Analysis to Solve Dynamic Facility Layout Problems: A...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Sotamba, Luis Miguel Pena, Mario Siguenza-Guzman, Lorena Univ Cuenca Fac Engn Dept Comp Sci Cuenca Ecuador Univ Cuenca Fac Chem Sci Dept Appl Chem & Syst Prod Cuenca Ecuador KU Fac Econ & Business Res Ctr Accountancy Leuven Belgium

ISBN: (纸本)9783031381645;9783031381652

The Dynamic Facility Layout Problem (DFLP) is concerned with finding an optimal facility design considering changes in the planning horizon. Since DFLP belongs to the non-polynomial hard class problem, different solutions have been used to find an optimal solution. However, a correct performance evaluation is needed to validate and compare the results with others. This performance evaluation refers to using both statistical and computational tests. When searching the literature on related papers, none consider these tests. The lack of such information and the constant evolution of algorithms motivated this work. The current document reviews the solution methodologies applied to solve DFLP and the manner the performance evaluation is done. In addition, the methods used to mix solution methodologies, called hybrid approaches, are included. This work was carried out using the Barbara Kitchenham methodology, in which studies from 2015 to 2022 were considered. A sample of 59 articles was analyzed, all about DFLP. As a result, this study identified two commonly used categories when solving DFLPs: hybrid and metaheuristic approaches. Furthermore, performance evaluation is done using different statistical methods in some cases, comparisons of some numerical results obtained from the algorithm output, and studies without comparisons. Finally, the results do not find any instances in which a methodology is applied to compose the algorithm when a hybrid approach is used. To the best of our knowledge, this work is the first in which performance evaluation is considered.

关键词： Dynamic Facility Layout Problem Optimization Heuristics Metaheuristics Hybrid methods Literature Review

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Accelerated Solution Methodology for 3D Hydrodynamic and Thermal Modeling of Grooved Heat Pipes with Complex Geometries 14th

Accelerated Solution Methodology for 3D Hydrodynamic and The...

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

作者： Gokce, Gokay Cetin, Barbaros Dursunkaya, Zafer ASELSAN Inc TR-06830 Golbasi Turkiye ID Bilkent Univ Mech Engn Dept Biofluid Mech Grp TR-06800 Ankara Turkiye Middle East Tech Univ Mech Engn Dept TR-06800 Ankara Turkiye

ISBN: (纸本)9783031672408;9783031672415

Heat pipes play a crucial role in industrial thermal management owing to their exceptional heat-carrying capacity, minimal thermal resistance and reliable performance. However, designing and optimizing heat pipes becomes intricate especially when dealing with multi-phase heat transfer encompassing complex phenomena like phase-change processes (i.e., evaporation, condensation and free surface flow). Grooved heat pipes, characterized by complex groove shapes, introduce an additional layer of complexity necessitating physically based mathematical models and skin friction correlations that may not always be readily available or may yield inferior results. To address these limitations, an innovative computational methodology is integrated into a commercial CFD program (Fluent R-(R)) using the Python R-(R) programming language. This approach allowed for comprehensive computation of the 3D fluid flow field and heat transfer phenomena within grooved heat pipes. Notably, the methodology incorporates data fitting procedures for boundary conditions leading to a substantial acceleration of the computation process and a reduction in solution times. This investigation represents a substantial advancement in addressing the challenges of multi-phase heat transfer phenomena while providing a compelling solution to the limitations of previous modeling methodologies for grooved heat pipes. Furthermore, the proposed methodology exhibits versatility, extending beyond its initial scope to encompass complex geometries like omega-shaped grooves and various physical scenarios involving phase-change phenomena and free-surface flow. Due to its comprehensive insights and adaptable framework, developed methodology serves as a valuable tool for analyzing heat pipes with multiple grooves addressing a significant gap in the literature.

关键词： Grooved heat pipes phase-change heat transfer hyperbolic regression computational fluid dynamics (CFD)

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