Journal of Civil Engineering and Transport最新文献_第2页

The programmable steering machine for the electric lightweight vehicle 电动轻量化汽车的可编程转向机

Journal of Civil Engineering and Transport Pub Date : 2023-03-16 DOI: 10.24136/tren.2023.002

L. Jemioł, Z. Wołczyński, Alfredas Rimkus, R. Smigins, Milena Górska, Mariusz Purtak

{"title":"The programmable steering machine for the electric lightweight vehicle","authors":"L. Jemioł, Z. Wołczyński, Alfredas Rimkus, R. Smigins, Milena Górska, Mariusz Purtak","doi":"10.24136/tren.2023.002","DOIUrl":"https://doi.org/10.24136/tren.2023.002","url":null,"abstract":"In this paper a programmable steering machine (PSM) and the lightweight electric powered vehicle, designed and made at the Kazimierz Pulaski University of Technology and Humanities in Radom (UTH Radom) have been presented. Both these technical objects are the result of the project carried out by the Student Research Group ?Turbodoładowani?. The steering machine has been developed with the programmable algorithms allowing to execute a controllable movement of the vehicle steering wheel. After execution, the system does not need an interaction with the driver. For this reason, a higher repetition of the vehicle traction measurements can be achieved. Such confirmation obtained in tests within which the time waveforms of rotation angle of the steering wheel by a set value of 45, 90, 180 and 360 degrees was recorded. In particular, the accuracy index for mentioned test conditions was calculated. Obtained results, expressed by the average value of the sensitivity index were lower than 2% within the tests carried out for ?45 degree maneuvers. In case of other tests i.e., for ?90, ?180 and ?360 degree maneuvers the accuracy index value was lower than 0.3%. In this way, it was confirmed that the tested PSM reached the appropriate operating parameters necessary for vehicle traction tests.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"8 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":"131349293","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

Air transport safety in UAV operational conditions 无人机运行条件下的航空运输安全

Journal of Civil Engineering and Transport Pub Date : 2023-03-16 DOI: 10.24136/tren.2023.001

Katarzyna Bolz, G. Nowacki

{"title":"Air transport safety in UAV operational conditions","authors":"Katarzyna Bolz, G. Nowacki","doi":"10.24136/tren.2023.001","DOIUrl":"https://doi.org/10.24136/tren.2023.001","url":null,"abstract":"The article presents the possibilities of using unmanned aerial vehicles in air transport. The use of UAVs in the airspace has become widespread, despite many implemented legal regulations, there are many incidents that threaten not only aircraft during the flight, but also the airport infrastructure. The potential threats and the chances of implementing remedial measures were analyzed. An attempt to evaluate the possibility of maintaining aviation safety at an appropriate level in the conditions of UAV operational conditions has been done. The main research problem was defined as follows: How would implementing unmanned aerial vehicles into the air transport system influence the acceptable level of safety? The article uses theoretical methods such as: system analysis, analysis and synthesis in the field of literature, analogy, comparative method. In terms of empirical methods, an original diagnostic survey was carried out, based on a selected group of people related to the explored topic. In addition, the observation method was used by the feedbacks and observations of the group of air traffic controllers from civil airports (located in Poland). The article describes the current transformation of air transport, taking into account the planned modernizations. It presents the PansaUTM system as one of the countermeasures, monitoring and securing the movement in the airspace. Furthermore, the transponder issue was raised in relation to the enhancement of the UAV identification system, with a detailed explanation of the importance of the TCAS (Traffic Collision Avoidance System). Referring to the prospects for the development of air transport, the latest design concepts for cargo drones were presented. The issue of full transport autonomy of UAVs was analyzed based on the requirements of legal regulations. The comparison of benefits and threats in conjunction with the conducted empirical methods allowed for the development of conclusions confirming the research hypothesis and indicating the possibility of using remedial measures in the process of UAV evolution.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"117 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":"117326764","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

Selected issues from the analysis of composite vehicle bodies 从复合材料车体的选择问题进行分析

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.013

Łukasz Gołębiewski, P. Żach

引用次数: 0

Safe device solutions in railway traffic control systems 铁路交通控制系统中的安全设备解决方案

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.007

M. Kornaszewski

引用次数: 0

Tests and assessment of quality of the packagings in the aspect of their application in transport processes 在运输过程中对包装的质量进行测试和评估

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.016

Z. Łukasik, A. Kuśmińska-Fijałkowska, S. Olszańska

引用次数: 0

Econometric models - a method for examining factors of implementation of public-private partnership projects in selected European countries 计量经济学模型-一种在选定的欧洲国家检验公私合作项目实施因素的方法

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.010

A. Rogowski, B. Zagożdżon

{"title":"Econometric models - a method for examining factors of implementation of public-private partnership projects in selected European countries","authors":"A. Rogowski, B. Zagożdżon","doi":"10.24136/tren.2022.010","DOIUrl":"https://doi.org/10.24136/tren.2022.010","url":null,"abstract":"Modern science is based on the study of economic phenomena and tries to quantify them in a measurable way. Econometric models are used for this purpose. The object of this research was to develop econometric models that show the strength of the influence of various factors on the implementation of public-private partnership (PPP) projects in the area of transport infrastructure in France, GB, Germany, the Netherlands and Belgium. The models express the dependence of the value and number of PPP contracts on the value of measurable PPP success factors. Projects with a value of at least EUR40 million were included. A linear model and seven models transformable to linear were used. Four groups of factors were considered as explanatory variables. Fourteen indicators were obtained. Principal components determined based on covariance and correlation matrices were also used. The best models for the number of PPP contracts are linear and hyperbolic I models. For the value of contracts - linear and hyperbolic I and logarithmic models. The best models were indicated taking into account the type of explanatory variables and regardless of the type of explanatory variables. Nine criteria were used to assess the quality of the models. Factors having a significant impact on the value and number of PPP models were identified from the best models. Factors having no significant influence were also indicated.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132374963","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

Certification system as a tool for improving the safety and sustainability of school-related travels 认证制度作为提高学校相关旅行的安全性和可持续性的工具

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.009

R. Okraszewska, Tomasz Mackun

{"title":"Certification system as a tool for improving the safety and sustainability of school-related travels","authors":"R. Okraszewska, Tomasz Mackun","doi":"10.24136/tren.2022.009","DOIUrl":"https://doi.org/10.24136/tren.2022.009","url":null,"abstract":"Despite the well-established physical, social, emotional, cognitive, and spatial benefits of active and autonomous school commuting of children and adolescents', many are driven by car. Pilot surveys and field research held in 2019 in 10 Gdansk primary schools confirmed this trend. The article presents a certification system for schools, commissioned by the City of Gdańsk, which is an element of a systemic solution shaping patterns of transport behavior in school trips. The essence of the proposed approach is motivating and supporting schools by government to create conditions conducive to independent and active travel of children and adolescents. An important element of the certification process is the assessment stage in accordance with the set of criteria adopted and grouped into six areas concerning: children transport behavior, infrastructure and traffic organization in and around the school, mobility policy, road safety, promotion, and education. Groups of criteria were divided into basic and extended ones and assigned points in an assessment calculator. A minimum threshold of points has been set in each category to attract schools to take comprehensive action. The assessment calculator has been supplemented by catalogues of good practices describing possible actions that could be taken to meet a given criterion. The full certification process has not yet been completed in Gdańsk due to the coronavirus pandemic and the transition to remote learning. However, the first infrastructural improvements have already been made in the vicinity of schools.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131690644","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

Assessment of selected methods of estimating the maximum back-of-queue size on a signal-controlled intersection approach 评价信号控制交叉口上估计最大排队队列大小的选定方法

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.008

D. Iwanowicz

{"title":"Assessment of selected methods of estimating the maximum back-of-queue size on a signal-controlled intersection approach","authors":"D. Iwanowicz","doi":"10.24136/tren.2022.008","DOIUrl":"https://doi.org/10.24136/tren.2022.008","url":null,"abstract":"The article presents the characteristics and evaluation of the accuracy of estimating the maximum length of the queue of vehicles at signalized intersections by commonly used methods in the world. The analyzes were based on the latest editions of the guidelines in the United States, Canada, Australia, Germany and Poland. In order to carry out accuracy analyzes, traffic tests were carried out at 5 intersection inlets in three different cities in Poland (Bydgoszcz, Torun, Warsaw), covering all phases of vehicle queue formation during individual periods of the signaling cycle (effective red and green signal). In total, the analysis had the results of tests from 81 hours of observation ~23,000 behaviors of vehicle drivers. Based on the analyzes it was found in particular: (1) slight differences in the construction of mathematical models of the considered calculation methods, with the exception of the US HCM model from 2016; (2) small errors in estimating the maximum queue length in unsaturated vehicle flow states (~3-5 vehicles/cycle and ~2-6 vehicles/15 minutes interval); (3) quite large errors in estimating the maximum queue length in saturated and oversaturated vehicle flow states (~11-16 vehicles/cycle and ~15-18 vehicles/15 minutes interval); (4) the main impact on estimation errors in oversaturation traffic states is not taking into account or incorrect determination of the 'so-called' initial queue length of the period preceding the analyzed period.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114604664","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

Innovative solution of mobile robotic unit for bricklaying automation 砖砌自动化移动机器人装置的创新解决方案

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.014

R. Dindorf, P. Woś

{"title":"Innovative solution of mobile robotic unit for bricklaying automation","authors":"R. Dindorf, P. Woś","doi":"10.24136/tren.2022.014","DOIUrl":"https://doi.org/10.24136/tren.2022.014","url":null,"abstract":"This study presents an innovative solution for a mobile robotic unit intended for the construction industry, the task of which is to automate time-consuming and burdensome masonry work performed manually using bricklayers. A ZSM mobile robotic bricklaying system (ZSM in Polish Zrobotyzowany System Murarski) was designed and developed in a demonstration version. The mobile ZSM consists of an ABB six degrees-of-freedom (6 DoF) industrial robot with a replaceable hydraulic gripper, a Hinowa tracked undercarriage with a hydraulic unit, hydraulic lifting and leveling module, a brick warehouse, a brick belt feeder, a mortar applicator, a control cabinet, and a control panel. Simulation tests were performed in a virtual ABB RobotStudio environment to verify the functioning of the robot and individual ZSM modules during the bricklaying process. ZSM control is based on the Siemens Simatic S7-1500 programmable controller in the fail-safe version, which supervises the correct operation of all devices. ZSM was tested under laboratory conditions and on the construction site. The robotic technological process of building a wall consists of the following stages: the robot grips the bricks, picks them up, manipulates them, applies mortar to them, and places them on the wall.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116059092","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: 1

The impact of policy response to Covid-19 on the transportation and storage sector in Visegrad Countries (V4) 应对Covid-19的政策对维谢格拉德国家运输和仓储部门的影响(V4)

Journal of Civil Engineering and Transport Pub Date : 2022-12-31 DOI: 10.24136/tren.2022.015

T. Tyc, Aleksandra Firek

{"title":"The impact of policy response to Covid-19 on the transportation and storage sector in Visegrad Countries (V4)","authors":"T. Tyc, Aleksandra Firek","doi":"10.24136/tren.2022.015","DOIUrl":"https://doi.org/10.24136/tren.2022.015","url":null,"abstract":"The paper is devoted to analysing national policy responses to the economic consequences of the COVID-19 pandemic in the Visegrad countries (Czechia, Hungary, Poland, and Slovakia) - on both the macroeconomic and microeconomic level. Focus is given to the transportation and storage sector (NACE Rev. 2 code H). The pandemic unevenly impacted this sector: while specific subsectors were thriving during this period (e.g. parcel delivery services), others were suffering due to abrupt mobility changes (e.g. public & individual mobility services). Public policies were presented not only as a tool to reduce the negative impact of the pandemic but also to provide a platform to build new competitive advantages for national business entities, thus providing the rationale for an analysis of the actual impact of programs aimed at the transportation and storage sector. The impact of the state-aid focusing on the analysed was uneven between the analysed countries. Even though, the deployed programs have helped the industry to return to pre-pandemic levels within 4 quarters. This proves that apart from the structure of state-aid programs and schemes, an important factor was the pre-pandemic value chains. This could serve as a starting point for further research as more data become available.","PeriodicalId":204178,"journal":{"name":"Journal of Civil Engineering and Transport","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132288191","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