Journal of Civil Engineering and Transport最新文献

A control algorithm to follow the limitations of an electric vehicle motor using the Tm4 Sumo drive as an example 以 Tm4 Sumo 驱动器为例，介绍一种遵循电动汽车电机限制的控制算法

Journal of Civil Engineering and Transport Pub Date : 2024-03-04 DOI: 10.24136/tren.2024.001

Jacek Barcik, Gabriel Kost, Mariusz Hetmanczyk

引用次数: 0

Power quality in the circuits of traction substation 牵引变电站电路中的电能质量

Journal of Civil Engineering and Transport Pub Date : 2023-12-22 DOI: 10.24136/tren.2023.015

Z. Olczykowski, Piotr Starula

{"title":"Power quality in the circuits of traction substation","authors":"Z. Olczykowski, Piotr Starula","doi":"10.24136/tren.2023.015","DOIUrl":"https://doi.org/10.24136/tren.2023.015","url":null,"abstract":"Rail transport in Poland uses direct current electric traction to power vehicles (locomotives and multiple units). It is therefore necessary to convert the AC voltage of the power system into the DC voltage of the traction system. The conversion of alternating voltage into direct voltage takes place in traction substations. Rectifier units installed at traction substations are used for this purpose. As a result, electric traction should be classified as non-linear consumers. In addition, the traction substation load changes dynamically. All this makes the electric traction a recipient generating a number of disturbances to the network. These disturbances affect the quality of electricity in the power system from which the traction substations are supplied, and the quality of energy in auxiliary and non-traction lines. The article presents the results of the analysis of measurements of electricity quality indicators recorded at selected points of the traction substation line. Parameters characterizing the quality of electricity were recorded, among others, in in the main line supplying the traction substation, non-traction needs line and auxiliary circuits. The presented article is another in a series of publications related to the assessment of the impact of DC electric traction on the power system.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"37 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138946017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Perception technology for conversion of off-road vehicles for the purposes of unmanned missions 为执行无人驾驶任务而改装越野车的感知技术

Journal of Civil Engineering and Transport Pub Date : 2023-12-22 DOI: 10.24136/tren.2023.014

Marek Nowakowski

{"title":"Perception technology for conversion of off-road vehicles for the purposes of unmanned missions","authors":"Marek Nowakowski","doi":"10.24136/tren.2023.014","DOIUrl":"https://doi.org/10.24136/tren.2023.014","url":null,"abstract":"Autonomous ground vehicles (AGV) have great potential for a wide range of applications, both in the civilian and military fields. Nowadays there is an interest in converting existing off-road vehicles into remotely controlled platforms with autonomous mode due to several benefits, including reducing the risk to human life, increasing efficiency and accuracy, and allowing the vehicles to operate in hazardous zones. Environmental perception technology plays a critical role in enabling the safe and effective operation during unmanned missions. This technology involves sensors, cameras, and other devices to gather information about the environment and provide the unmanned ground platform (UGV) with a perception of its surroundings. In recent years, there has been significant progress in the development of environmental perception systems, including the use of advanced sensors, machine learning algorithms, and other innovations have become a focus of research and development for many countries. This paper describes a combination of commercially available vision sensors, laser scanners and navigation modules for comprehensive understanding of operational environment, orientation, objects recognition during autonomous mode. Typical methods for vision and lidar-based obstacle detection and object classification for unmanned vehicles are described. The aim of the work was to examine in real environment the performance of a perception system that was configured using a daylight-thermal observation and stereo cameras, lidar sensor, GNSS module, radio links along with computing units. This system was evaluated in terms of performance of different sensors considering implementation for all terrain vehicle as subsystem for unmanned mode.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"10 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138944065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic safety management model for rail traffic control 轨道交通控制的动态安全管理模型

Journal of Civil Engineering and Transport Pub Date : 2023-12-22 DOI: 10.24136/tren.2023.016

Przemysław Ilczuk, Magdalena Kycko, Dariusz Szmel

{"title":"Dynamic safety management model for rail traffic control","authors":"Przemysław Ilczuk, Magdalena Kycko, Dariusz Szmel","doi":"10.24136/tren.2023.016","DOIUrl":"https://doi.org/10.24136/tren.2023.016","url":null,"abstract":"In rail transport, increasing emphasis has been placed in recent years on improving safety levels. Therefore, more requirements and legal documents require risk analyses to be carried out at various stages of investment implementation. One of the leading legal documents that introduce the obligation to monitor risk is Directive (EU) 2016/798 of the European Parliament and of the Council of 11 May 2016 on railway safety and Commission Implementing Regulation (EU) No 402/2013 of 30 April 2013 on the common safety method for risk evaluation and assessment and re-pealing Regulation (EC) No 352/2009. Additionally, for traffic control systems, the requirements of CENELEC standards are mandatory. These documents present the subject of safety level and show its relation with the safety targets defined in the railway system, including the different ways of measuring them. Methods are also available to analyse the safety level of railway system components in detail, both at the level of individual components, subsystems, and the whole national railway system. However, after conducting an in-depth analysis of the literature, the authors of the article indicate that these methods are not consistent with each other. There is no method defined to present the direct relation of the safety level of the components of the system on the achievement of safety targets for the national railway system. The research and analysis aimed to define an approach, a method that would meet all legal requirements but at the same time would allow to clearly and reliably determine the safety level of the railway system. To define a unified approach, the authors of the article propose to develop a model of a dynamic object - a railway system safety model, which has also been verified on accurate safety data in rail transport in recent years. This model organises the process of safety management on railways and allows to determine values influencing the achievement of safety targets on an assumed level.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"24 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138947014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Disturbance of Trains Movement under the ERTMS Control System ERTMS控制系统下列车运动的扰动

Journal of Civil Engineering and Transport Pub Date : 2023-09-04 DOI: 10.24136/tren.2023.008

Marek Sumiła

{"title":"Disturbance of Trains Movement under the ERTMS Control System","authors":"Marek Sumiła","doi":"10.24136/tren.2023.008","DOIUrl":"https://doi.org/10.24136/tren.2023.008","url":null,"abstract":"The article presents a discussion leading to the identification the possible causes of disturbances in train movements under the supervision of the European Rail Traffic Management System ERTMS. As a consequence of detected events, unintentional initiation of a train braking procedure occurs despite the absence of objective reasons for such behaviour. In essence, the paper presents the ERTMS as a real-time system based on the two subsystems ETCS and GSM-R. Each of these subsystems includes a vehicle part and an infrastructure part. The article starts by identifying general considerations that may affect the lack of compatibility between vehicle and trackside infrastructure as a result of changes in versions of the specification (baseline). The following part of the article reviews the process leading to train braking is reviewed. The next part of the article refers to ETCS scenarios and parameters affecting the system response during operation. It referred to the considerations of message transmission between the ETCS ground infrastructure and the vehicle via the telecommunications network, including the GSM-R. The final section focuses on the causes and consequence of the overlap of the RBC's and GSM-R radio cells boundaries. The article concludes with a brief summary and conclusions.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131039516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functioning of the Crises Management System at the country and commune including the aspects of transport 危机管理系统在乡村和社区的运作，包括交通方面

Journal of Civil Engineering and Transport Pub Date : 2023-09-04 DOI: 10.24136/tren.2023.005

Mateusz Krawczyk, Gabriel Nowacki

{"title":"Functioning of the Crises Management System at the country and commune including the aspects of transport","authors":"Mateusz Krawczyk, Gabriel Nowacki","doi":"10.24136/tren.2023.005","DOIUrl":"https://doi.org/10.24136/tren.2023.005","url":null,"abstract":"This article discusses the problems of the crisis management system, with particular emphasis on the county and commune levels, along with the aspect of transport as part of crisis response. The aim of the work is to present the essence of the system, its determinants interdependent on the dynamics of crisis events, which should be taken over by means of planned actions. The crisis management system is imperfect, its activity is ineffective due to faulty organizational solutions, incomplete staffing of jobs, incomplete legal regulations and insufficient financial, information, human and material resources. \u0000The work uses both quantitative and qualitative methods, such as: system analysis, cause-and-effect analysis, statistical method and synthesis. The results of the pilot studies were presented and old and new problems were presented. Moreover, practical solutions were proposed to improve the crisis management system. Nevertheless, not all problems are presented in this paper. The spectrum of the issue, its complexity and the changes announced by the Polish government indicate a further need to raise this issue on a scientific basis.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122066716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Use Cases and the UML language in the design of Intelligent Transportation Systems 用例和UML语言在智能交通系统设计中的应用

Journal of Civil Engineering and Transport Pub Date : 2023-09-04 DOI: 10.24136/tren.2023.007

Tomasz Kamiński, Piotr Kamiński

{"title":"Application of Use Cases and the UML language in the design of Intelligent Transportation Systems","authors":"Tomasz Kamiński, Piotr Kamiński","doi":"10.24136/tren.2023.007","DOIUrl":"https://doi.org/10.24136/tren.2023.007","url":null,"abstract":"The purpose of this paper is to analyse the applicability of the description of use cases and the UML language that takes them into account in the process of designing Intelligent Transportation Systems (ITS). These systems are built using standardized solutions and devices, but the system itself and the individual organizational solutions used therein are individually tailored to the needs of the employer - the manager of the road network on which the system is implemented. The first stage of the project may include verbal descriptions of the requirements, proposals for solutions, relations between system elements, contents of databases, etc. However, the next stages of the work should involve the use of tools to formalize the record so that it is understandable to the entire project team, the contractors of the system elements, and then form the basis for the development of design and detailed documentation. The tools that can be used in the design process of an ITS solution are, described in the paper use cases that define the interaction of system users (\"actors\") with the system, and the UML language used in the design of information systems. The paper describes the legal basis for ITS solutions, ways of defining use cases, the UML, including use case diagrams, behavioural diagrams and structural diagrams. Examples of the application of the UML to describe the design of an ITS system are also presented.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131742668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The use of the R2 coefficient of determination to determine the impact of selected parameters on the number of fatalities in road accidents in Poland compared to selected European countries in 2010-2020 使用R2决定系数来确定选定参数对2010-2020年波兰与选定欧洲国家道路交通事故死亡人数的影响

Journal of Civil Engineering and Transport Pub Date : 2023-09-04 DOI: 10.24136/tren.2023.006

D. Frej

{"title":"The use of the R2 coefficient of determination to determine the impact of selected parameters on the number of fatalities in road accidents in Poland compared to selected European countries in 2010-2020","authors":"D. Frej","doi":"10.24136/tren.2023.006","DOIUrl":"https://doi.org/10.24136/tren.2023.006","url":null,"abstract":"The article presents statistical data on the state of road transport safety in Poland against the background of selected European countries in the years 2010-2020. The article presents the characteristics of the change in the length of motorways along with the percentage rate of increase in the length of motorways in selected European countries. Statistical data on the number of registered motor vehicles in Poland against the background of selected European countries in the analyzed period are presented. The main purpose of the article is to use the coefficient of determination R2 to determine the impact of the number of registered motor vehicles and the length of motorways on the number of fatalities in road accidents in selected European countries. The authors chose the coefficient of determination R2 as an indicator of how reducing the overall number of road accidents and increasing the length of motorways will affect the number of fatalities. The coefficient of determination is used to determine what percentage of one variable affects the variability of the other variable. The determined high value of the determination index R2 (close to 1) indicates a large impact of the analyzed variable on the number of fatalities in road accidents. The high result of the determination coefficient R2 for Poland in terms of the analyzed variables confirms that a further reduction in the number of fatalities in road accidents is possible thanks to the expansion of motorways and the reduction of the number of motor vehicles.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129824109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Steady-state comparison of torque vectoring and vehicle tilt influence on narrow car steering characteristics 转矩矢量和车辆倾斜对窄车转向特性影响的稳态比较

Journal of Civil Engineering and Transport Pub Date : 2023-03-16 DOI: 10.24136/tren.2023.004

K. Weigel-Milleret

引用次数: 0

Determining the strategic position of car-sharing services in Poland based on the stakeholder analysis method 基于利益相关者分析法确定波兰汽车共享服务的战略地位

Journal of Civil Engineering and Transport Pub Date : 2023-03-16 DOI: 10.24136/tren.2023.003

M. Cieśla

{"title":"Determining the strategic position of car-sharing services in Poland based on the stakeholder analysis method","authors":"M. Cieśla","doi":"10.24136/tren.2023.003","DOIUrl":"https://doi.org/10.24136/tren.2023.003","url":null,"abstract":"This article presents the use of the stakeholder analysis method to characterize the strategic position of car-sharing services in Poland. The theoretical part presents a detailed theory of stakeholders, as well as detailed methods and the course of the interest group analysis procedure. It covers the fundamentals of stakeholder theory which refers to the concept of strategic planning, system theory, organization theory, social responsibility and strategic management. The characteristics of stakeholder analysis are presented together with mostly used methodology. The focus is put on most common analysis tools including the matrix of M. Johanson and K. Scholes based on the earlier Mendelow matrix and the map of stakeholders. The legitimacy and benefits of using the discussed method to determine the strategic position of modern and developing services have been presented. The research part presents an example of the use of the stakeholder analysis method in the Polish sector of car sharing services. The car-sharing services company stakeholder analysis of 23 entities provided knowledge on building relationships with employees and their involvement in the company's processes. The analysis made it possible to improve the strategic position of the company and determination of its position in negotiations with other organizations.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121458129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0