Transportation Research Procedia最新文献

英文中文

Design of stator-magnet transverse-flux linear oscillatory machine for reciprocating drives in transport 运输往复传动定子-磁体横磁直线振荡机构的设计

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.094

Matúš Horník , Pavol Rafajdus , Hao Chen , Andrej Blaško

Electric vehicles (EVs) offer a promising solution to mitigate climate change and environmental pollution, with research focusing on improving their efficiency and driving range. Among the key components of EVs are compressors, which are essential for air conditioning (AC) systems and battery thermal management, in EVs an separate electric motor is needed for their operation. This paper explores the design and optimization of a stator-magnet transverse-flux linear oscillatory machine (SMTLOM) for compressor applications in EVs. The SMTLOM features permanent magnets embedded in the stator, offering advantages such as simplified installation, enhanced protection against vibrations, and reduced reliance on rare-earth materials. The machine operates in two modes: a low-current efficiency mode for minimal energy consumption and a high-current power mode for heavy-load operations. A comprehensive 3D finite element analysis was conducted to optimize the SMTLOM’s performance while minimizing the volume of permanent magnets. Results show possible usage of SMTLOM in compressor. The findings highlight the trade-offs between force generation, efficiency, and material usage, providing valuable insights into the potential of SMTLOM technology for EV compressor applications.

电动汽车（ev）为缓解气候变化和环境污染提供了一个很有前途的解决方案，研究重点是提高它们的效率和行驶里程。在电动汽车的关键部件中，压缩机是空调系统和电池热管理必不可少的部件，在电动汽车中需要单独的电动机来运行。本文研究了用于电动汽车压缩机的定子-磁体横向磁通线性振荡电机（SMTLOM）的设计与优化。SMTLOM定子内嵌永磁体，具有简化安装、增强抗振动保护、减少对稀土材料依赖等优点。机器有两种工作模式：一种低电流效率模式，用于最小能耗；一种大电流功率模式，用于大负载工作。为了在减小永磁体体积的同时优化SMTLOM的性能，进行了全面的三维有限元分析。结果表明SMTLOM在压缩机中的应用是可行的。研究结果强调了产生力、效率和材料使用之间的权衡，为SMTLOM技术在电动汽车压缩机应用中的潜力提供了有价值的见解。

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引用次数: 0

Changes in internal resistance RS after LiFePO4 cell cycling LiFePO4电池循环后内阻RS的变化

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.091

Marek Šimčák , Michal Frivaldský

This study examines the variations in internal resistance (R_S) of LiFePO4 cells during cycling and the correlation of these variations with the state-of-charge (SOC) over the cell’s operational range. Characterizing the dynamic behavior of internal resistance across several charge-discharge cycles is the main goal. To depict these changes, a three-dimensional map is used, with the Z-axis showing the number of cycles the cell has experienced, the Y-axis representing the internal resistance (R_S), and the X-axis representing the cell’s state of charge (SOC). By showing the pace and pattern of resistance variation as the number of cycles grows, the research sheds insights on how internal resistance changes over time. The article also provides a thorough explanation of the composition and cycling parameters of the particular LiFePO4 cell that was utilized. The findings provide a better understanding of the mechanisms influencing the performance deterioration of LiFePO4 batteries by illustrating the connection between cycling-induced resistance changes.

本研究考察了LiFePO4电池在循环过程中内阻（RS）的变化，以及这些变化与电池工作范围内的荷电状态（SOC）的相关性。表征跨几个充放电循环的内阻的动态行为是主要目标。为了描述这些变化，使用了三维地图，其中z轴表示电池经历的循环次数，y轴表示内阻（RS）， x轴表示电池的充电状态（SOC）。通过显示随着循环次数的增加，阻力变化的速度和模式，该研究揭示了内部阻力如何随时间变化的见解。本文还对所使用的特定LiFePO4电池的组成和循环参数进行了全面的解释。该研究结果通过阐明循环诱导的电阻变化之间的联系，为LiFePO4电池性能下降的影响机制提供了更好的理解。

引用次数: 0

Electronic Regulation of Thermoelectric Modules in a Flow Cooler 流动冷却器中热电模块的电子调节

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.078

Vladimír Samaš , Juraj Gerlici

The study addresses the design and implementation of two potential solutions for cooling water in the brake stand of railway vehicles, focusing on accuracy, efficiency, and compliance with technical standards. A detailed exploration is provided of an electronic cooling system that utilizes modern microprocessors for precise regulation of the output water temperature. The goal is to achieve the required temperature parameters as specified by UIC 541-3 and IRS 50548, which details the exact conditions for testing train braking systems. The proposed system integrates Peltier modules (thermoelectric devices) for temperature regulation, enabling water cooling. Multiple temperature sensors are incorporated to ensure accurate feedback for the control unit. Two primary variants of the cooling system control are presented. The first variant uses relay circuits for control, offering a straightforward solution. The second, alternative solution, employs transistor-based control through drivers, which enhances regulation dynamics and system efficiency. The scientific contribution of this study is the analysis and design of various solution variants that meet the water temperature requirements as per UIC 541-3 and IRS 50548 standards. The results can be applied not only in the testing of braking systems but also in other fields where temperature regulation is crucial. By integrating advanced control strategies, such as TEC-based cooling for braking components, braking stands can improve the precision of thermal management during tests, leading to more accurate and repeatable results. The synergy between electronic cooling systems and braking test stands presents a promising direction for future research, supporting the ongoing transition to greener and more efficient railway transport solutions.

该研究解决了铁路车辆制动座冷却水的两种潜在解决方案的设计和实施，重点是准确性，效率和符合技术标准。详细探讨了利用现代微处理器精确调节输出水温的电子冷却系统。目标是达到UIC 541-3和IRS 50548规定的所需温度参数，这些参数详细说明了测试火车制动系统的确切条件。该系统集成了Peltier模块（热电装置），用于温度调节，实现水冷却。多个温度传感器集成，以确保控制单元的准确反馈。提出了冷却系统控制的两种主要变体。第一种变体使用继电器电路进行控制，提供了一个直接的解决方案。第二种替代方案是通过驱动器采用基于晶体管的控制，从而增强了调节动态和系统效率。本研究的科学贡献在于分析和设计了满足UIC 541-3和IRS 50548标准的水温要求的各种溶液变体。研究结果不仅可以应用于制动系统的测试，还可以应用于温度调节至关重要的其他领域。通过集成先进的控制策略，例如基于tec的制动部件冷却，制动架可以提高测试期间热管理的精度，从而获得更准确和可重复的结果。电子冷却系统和制动试验台之间的协同作用为未来的研究提供了一个有希望的方向，支持向更环保、更高效的铁路运输解决方案的持续过渡。

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引用次数: 0

Eigenanalysis of wagon wheelsets based on the rigid body dynamics 基于刚体动力学的货车轮对特征分析

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.080

Ján Dižo , Miroslav Blatnický , Alyona Lovska , Martin Bučko , Mariusz Kostrzewski , Oleksandr Kravchenko

The presented paper is focused on mathematical modelling of torsion oscillation of wheelsets and analysis of its eigenfrequencies and eigenmodes. A mathematical model of torsion oscillation of a wheelset is derived. Two types of wheelsets are analysed, namely a wheelset equipped with a pad brake and a wheelset equipped with both pad brake and disc brake. The aim of the research is to find the eigenfrequencies and resonance curves of these two types of wheelsets of a freight wagon. These wheelsets are considered as rigid bodies. The Lagrange’s equations of the second kind method is applied for a derivation of the mathematical models of the wheelsets. The wheelsets differ to each other by the number of degrees of freedom. The results are presented in a form graphical illustration of resonance curves with marking the resonance zones for individual types of wheelsets.

本文重点研究了轮对扭转振动的数学建模及其特征频率和特征模态分析。推导了轮对扭转振荡的数学模型。分析了两种类型的轮对，即配有垫式制动器的轮对和同时配备垫式制动器和盘式制动器的轮对。研究的目的是找出这两种类型的货车轮对的特征频率和共振曲线。这些轮对被认为是刚体。采用第二类拉格朗日方程方法推导了轮对的数学模型。轮对之间的自由度不同。结果以共振曲线的图形说明形式呈现，并标记了各类型轮对的共振区。

引用次数: 0

Defect Analysis in 3D-Printed PLA Materials Using Pulsed Thermography and Advanced Post-Processing Technique 基于脉冲热成像和先进后处理技术的3d打印PLA材料缺陷分析

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.084

Lucia Deganová , Vladimír Dekýš , Barbora Drvárová , Michal Švantner , Alžbeta Sapietová

Non-destructive testing (NDT) techniques ensure the safety and reliability of materials widely used in the transportation industry. Due to their lightweight nature, cost-effectiveness, and biodegradability, polylactic acid (PLA)-based materials are gaining attention in various transportation sectors, particularly in automotive and railway applications. PLA is commonly used in interior components and lightweight structural elements. However, defects such as voids, porosity, and layer delaminations may occur during the manufacturing process of this material, potentially compromising the material’s mechanical integrity and long-term performance. Infrared non-destructive testing (IRNDT) provides a fast and non-invasive solution for detecting such defects in PLA-based structures. This study evaluates Thermographic Signal Reconstruction (TSR) as a post-processing technique for enhancing defect visibility in 3D-printed PLA samples subjected to pulsed thermography. The results obtained using TSR are compared with raw thermographic data to assess its effectiveness in improving defect detection.

无损检测（NDT）技术确保了运输行业中广泛使用的材料的安全性和可靠性。由于其轻量化，成本效益和可生物降解性，聚乳酸（PLA）基材料在各种运输部门，特别是在汽车和铁路应用中受到越来越多的关注。PLA通常用于内部部件和轻质结构元件。然而，在这种材料的制造过程中，可能会出现空洞、孔隙和分层等缺陷，从而潜在地损害材料的机械完整性和长期性能。红外无损检测（IRNDT）为检测pla基结构中的此类缺陷提供了一种快速、无创的解决方案。本研究评估了热成像信号重建（TSR）作为一种后处理技术，用于增强脉冲热成像3d打印PLA样品的缺陷可见性。利用TSR获得的结果与原始热像数据进行了比较，以评估其在改进缺陷检测方面的有效性。

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引用次数: 0

Capacity and safety aspects of turbo-roundabouts 涡轮回旋处的容量和安全问题

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.017

Kristián Čulík , Alica Kalašová , Peter Fabian

The turbo roundabout (TR) represents a modern solution in road infrastructure, distinguished by its geometric design and specialized construction elements, which enhance efficiency and safety compared to traditional roundabouts. Conventional roundabouts often lack the parameters to safely and smoothly handle high traffic volumes. This article examines the capacity and safety aspects of TRs, analyzing their performance through capacity assessment. The findings confirm that properly designed TRs can effectively manage high traffic intensity, minimize collision points, and optimize traffic flow. However, the article also discusses the negative aspects of this type of roundabout, including the high costs of construction, more complex navigation for drivers, challenges with pedestrian and cyclist management, and specific conditions required for their implementation. This type of roundabout is particularly suitable for locations with high traffic loads and multiple lanes in the main direction, where it can significantly improve road safety and traffic fluidity.

涡轮回旋处（TR）代表了道路基础设施的一种现代解决方案，其特点是其几何设计和专门的构造元素，与传统的回旋处相比，它提高了效率和安全性。传统的环形交叉路口往往缺乏安全、平稳地处理高交通量的参数。本文考察了tr的容量和安全性，通过容量评估分析了它们的性能。研究结果证实，合理设计的交通枢纽可以有效管理高交通强度，减少碰撞点，优化交通流量。然而，本文也讨论了这种环形交叉路口的负面影响，包括建设成本高、司机导航更复杂、行人和骑自行车的人管理面临的挑战，以及实施这种环形交叉路口所需的具体条件。这种环形交叉路口特别适用于交通负荷大、主向多车道的地段，可以显著提高道路安全性和交通流动性。

引用次数: 0

Assessing logistics performance in global regions using selected multi-criteria assessment methods 使用选定的多标准评估方法评估全球区域的物流绩效

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.033

Dominika Jonasíková , Vladimír Konečný

Logistics is an integral part of globalization and economic growth, and its efficiency is crucial for the competitiveness of countries and regions. The study focuses on the analysis of the Logistics Performance Index (LPI) in five global regions - the European Union, North America, Latin America and the Caribbean, South Asia, and East Asia and the Pacific. By applying the entropy and MAUT methods, key aspects of logistics were assessed, resulting in a ranking of the regions according to their performance. The results showed that North America and East Asia achieved the best rankings, while South Asia showed the lowest. The study also identifies the importance of each LPI aspect and highlights their impact on overall logistics performance. Logistics performance as assessed by the LPI and is also closely related to the quality of logistics services with respect to each LPI aspect.

物流是全球化和经济增长的重要组成部分，其效率对国家和地区的竞争力至关重要。该研究重点分析了全球五个地区的物流绩效指数（LPI）——欧盟、北美、拉丁美洲和加勒比地区、南亚、东亚和太平洋地区。运用熵值法和MAUT法，对物流的关键方面进行了评估，并根据其表现对区域进行了排名。结果显示，北美和东亚的排名最好，而南亚的排名最低。该研究还确定了每个LPI方面的重要性，并强调了它们对整体物流绩效的影响。物流绩效由LPI评估，并与物流服务的质量密切相关，涉及到每一个LPI方面。

引用次数: 0

Qualitative analyses in the quality assurance system for manufacturing processes - a case study for the elements of the car’s mechanism movement 制造过程质量保证系统的定性分析-汽车机械运动要素的案例研究

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.037

Magdalena Mazur

The article presents selected aspects of the quality assurance system for production in the Automotive system. The structure of quality assurance elements in continuous production is presented, indicating the stages of quality supervision. An analysis of quality in the production of a car cable is made - based on the control plan and process risk analysis. The procedure for statistical analysis of quality for a selected element is presented. And guidelines for these analyses in the continuous quality monitoring system are presented. The quality monitoring system is an element of the complaint supervision program used in the analysis of the 8d report. The article is an analysis of quality requirements for manufacturing processes. It is a case study analysis regarding the fulfillment of quality requirements, which result from the guidelines of the standards. It is a verification of the fulfillment of requirements for the analyzed process, which will also be implemented for all other processes in the future. The presented analyses contain the structure of collecting data, their processing and use in each production stage, which is carried out in the enterprise. The importance of collecting statistical data and their use in critical points of the production process is indicated. The purpose of this article is to present the topic of quality requirements in the automotive industry and to show a wide range of methods and tools used by companies to meet them.

本文介绍了汽车系统生产质量保证体系的几个方面。介绍了连续生产中质量保证要素的结构，指出了质量监督的阶段。基于控制计划和过程风险分析，对某汽车电缆的生产过程进行了质量分析。介绍了对选定元素进行质量统计分析的程序。并提出了在连续质量监测系统中进行这些分析的指导原则。质量监控系统是8d报告分析中使用的投诉监督程序的一个组成部分。本文是对制造过程质量要求的分析。这是一个关于实现质量要求的案例研究分析，这是由标准的指导方针产生的。它是对被分析过程的需求实现的验证，这也将在将来对所有其他过程实施。本文的分析包含了数据的采集结构、数据在企业各个生产阶段的处理和使用。指出了收集统计数据及其在生产过程关键环节中的应用的重要性。本文的目的是介绍汽车行业的质量要求主题，并展示公司为满足这些要求而使用的各种方法和工具。

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引用次数: 0

Wear-resistance of the DLC AF+ coating investigated by the Tip-on-Flat method 用Tip-on-Flat方法研究了DLC AF+涂层的耐磨性

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.049

Martin Vicen , Otakar Bokůvka , Richard Joch , Pavol Belány , Peter Špuro , Ružica Nikolić

Wear resistance of the DLC AF+ coating, deposited on the high-grade, low-alloy steel was experimentally verified by the tribometer Tip-on-Flat testing method. Experimental works included determination of the substrate chemical composition, heat treatment, microstructure evaluation, EDX analysis, mechanical properties verifying and wear-resistance measurement at very high contact pressure. From the results obtained by experiments, it was concluded that the DLC AF+ coating has very good wear resistance under the contact pressure caused by a diamond tip (with the tip radius of 0.3 mm). The DLC AF+ coating can be recommended for surface protection of steels.

采用摩擦计尖对平试验方法，对沉积在高档低合金钢上的DLC AF+涂层的耐磨性进行了实验验证。实验工作包括测定衬底化学成分、热处理、显微组织评估、EDX分析、机械性能验证和极高接触压力下的耐磨性测量。实验结果表明，在金刚石针尖（针尖半径为0.3 mm）产生的接触压力下，DLC AF+涂层具有非常好的耐磨性。DLC AF+涂层可推荐用于钢的表面保护。

引用次数: 0

Optimization of in-plant logistics processes in assembly systems using digital simulation tools: A case study using AGV and Twiserion Design Manager 使用数字仿真工具优化装配系统中的工厂内物流流程：使用AGV和Twiserion Design Manager的案例研究

Transportation Research Procedia

Pub Date : 2026-01-01 DOI: 10.1016/j.trpro.2025.11.050

Dávid Komačka , Martin Krajčovič , Marián Matys , Milan Marčan

This paper presents a study focused on the optimization of in-plant logistics processes in assembly systems using digital simulation tools. Specifically, it deals with the design and implementation of a model-based tool, Twiserion Design Manager, which allows the creation of 3D parametric models of manufacturing and logistics systems. The paper compares two optimization options for the supply of assembly sites using AGVs (Automated Guided Vehicles). The results show that the optimization variant combining two workplaces into a single supply circuit reduces the number of AGVs needed by 50% while reducing the overall transport performance. This approach demonstrates the practical use of digital technologies to improve the efficiency of logistics operations and decision support.

本文介绍了一项研究，重点是利用数字仿真工具对装配系统中的工厂内物流过程进行优化。具体来说，它处理基于模型的工具Twiserion design Manager的设计和实现，该工具允许创建制造和物流系统的3D参数化模型。本文比较了使用agv（自动导引车）提供装配场地的两种优化方案。结果表明，将两个工作场所合并为单个供电电路的优化变体减少了所需agv数量的50%，同时降低了整体运输性能。这种方法展示了数字技术在提高物流运作和决策支持效率方面的实际应用。

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