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THE MEMS-BASED BAROMETRIC ALTIMETER INACCURACY AND DRIFT PHENOMENON 基于mems的气压高度计存在误差和漂移现象
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.9
T. Matyja, A. Kubik, Z. Stanik
MEMS technology has made sensors for measuring barometric pressure and altitude above sea level very cheap and widely used in many consumer electronic devices. This paper presents a theoretical analysis of the sources and types of errors in the barometric altimeter using the standard atmosphere model (ISA). Methods for correcting principal errors caused by non-standard sea level conditions are described and compared. A method of correcting errors in the case of altimeter horizontal movement to the air column and total pressure measurement was proposed. It was compared with another method known from the literature. In the numerical experiment, data recorded by a bicycle computer equipped with a MEMS-based barometric altimeter was analyzed. As the GPS data of the route covered was also known, it was possible to compare the recorded altimeter data with the heights determined from the digital terrain model (DTM), which in this case were considered accurate. The error of the measured altitude calculated in this way was tried to be divided into the principal error, the external error caused by the sensor movement, and the barometer drift. Hence, a numerical experiment was carried out in which, based on the recorded data, an attempt was made to reconstruct non-standard sea level conditions and the impact of speed on the sensor measurements. Furthermore, a method of solving such a reverse problem was proposed. The results of the presented studies can be used in the design of systems correcting the indications of barometric altimeters. The accuracy of the altitude measurement is especially important for small controlled flying objects (UAH) and when recording the route of vehicles moving on the ground.
MEMS技术使得用于测量气压和海拔高度的传感器非常便宜,并广泛应用于许多消费电子设备中。本文用标准大气模式(ISA)对气压高度计误差的来源和类型进行了理论分析。对非标准海平面条件引起的主误差的校正方法进行了描述和比较。提出了一种校正高度计水平移动到气柱和测量总压时误差的方法。将其与文献中已知的另一种方法进行了比较。在数值实验中,对装有mems气压高度计的自行车计算机记录的数据进行了分析。由于所覆盖路线的GPS数据也是已知的,因此可以将记录的高度计数据与数字地形模型(DTM)确定的高度进行比较,在这种情况下,DTM被认为是准确的。尝试将用这种方法计算的测量高度误差分为主误差、传感器运动引起的外部误差和气压计漂移。因此,进行了数值实验,在记录数据的基础上,尝试重建非标准海平面条件和速度对传感器测量的影响。在此基础上,提出了一种求解该类逆向问题的方法。所提出的研究结果可用于校正气压高度计指示的系统设计。高度测量的准确性对于小型受控飞行物(UAH)和记录地面移动车辆的路线尤为重要。
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引用次数: 1
INNOVATIVE SOLUTIONS OF DEVICES WITHIN THE SCOPE OF ENERGY CONSUMPTION APPLIED IN VARIOUS BRANCHES OF TRANSPORT 在能源消耗范围内的设备创新解决方案应用于各种交通部门
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.10
Aldona KUŚMIŃSKA-FIJAŁKOWSKA, Z. Łukasik, J. Kozyra
One of the priorities of the EU economy is to create the best possible conditions for the design and implementation of innovative solutions within the scope of energy efficiency. In recent years, there has been quick technological progress in the field of devices having controlled motor drive used for air purification, and from heating plates, which are applied in the eating places, including restaurants and zones for preparing meals in various means of transport. The research conducted by the EU on EcoDesign requirements showed that range hoods at the stage of their use have a considerable potential of saving energy. The introduction of energy efficiency labels to the market has improved the energy efficiency of these devices and accelerated the transformation of the market to implement energy-saving technologies, which according to the experts, may lead to an annual primary energy saving of 27 PJ/year in 2021, which may increase in 2030 to 60 PJ/year. The authors of this publication researched the fluid dynamic efficiency of a selected range hood, showing the necessity of investments in new technologies. Patented original solutions of the range hoods that can be applied, among others, in such means of transport as passenger ships, cargo ships, and submarines having a zone for preparing meals were presented in this article. An environmental aspect in the context of energy consumption was shown during the phase of using the device for air purification, providing many premises and arguments for future constructional solutions for energy management in various branches of transport and more.
欧盟经济的优先事项之一是在能效范围内为设计和实施创新解决方案创造尽可能好的条件。近年来,在具有用于空气净化的受控电机驱动的设备以及应用于餐饮场所的加热板领域,技术进步很快,包括餐馆和各种交通工具中的备餐区。欧盟对生态设计要求进行的研究表明,油烟机在使用阶段具有相当大的节能潜力。将能效标签引入市场提高了这些设备的能效,并加快了市场实施节能技术的转型,据专家称,这可能导致2021年一次能源年节约27 PJ/年,2030年可能增加到60 PJ/年。本出版物的作者研究了选定抽油烟机的流体动力学效率,表明了投资新技术的必要性。本文介绍了可应用于客船、货船和潜艇等具有备餐区的运输工具的抽油烟机的专利原始解决方案。在使用该设备进行空气净化的阶段,展示了能源消耗的环境方面,为未来交通运输等各个部门的能源管理结构解决方案提供了许多前提和论据。
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引用次数: 0
COMPARATIVE ANALYSIS OF THE WEIGHT AND QUALITY OF URBAN BUS TRANSPORT SERVICES: A CASE STUDY OF BAKU 城市公交运输服务重量和质量的比较分析:以巴库为例
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.6
F. Dashdamirov, Ulvi Javadli, Turan Verdiyev
With the growth of the population and the expansion of the territory of large cities, certain difficulties arise in meeting the needs of passengers for transportation. This article studied the satisfaction of users with the city's public transport system, especially the bus transport. Thus, a survey was conducted among passengers in Baku to assess their satisfaction with public transport. The survey covered all districts of Baku in general. The study was conducted in October 2021. The questions were aimed at identifying the weight, reasons for preferring the different types of public transport, the level of satisfaction of the population with these types, assessing the quality of services and the lack of urban bus transport. The level of satisfaction of survey participants with the work of public transport by gender and age groups was determined. Subsequently, this study showed that most of the population movements are carried out by bus transport. The analysis revealed factors that reduce the quality of service on bus routes. In addition, it examined the reasons why the population chose the bus transport, the shortcomings of the bus transport, the effectiveness of dedicated bus lanes, and attitudes toward the use of alternative public transport. Summarily, this study was successful in identifying the shortcomings of public transport in the city, improving passenger service to increase passenger satisfaction toward attracting more people to public transport.
随着人口的增长和大城市面积的扩大,在满足旅客的交通需求方面出现了一定的困难。本文研究了用户对城市公共交通系统的满意度,特别是公交交通的满意度。因此,在巴库的乘客中进行了一项调查,以评估他们对公共交通的满意度。这项调查涵盖了巴库的所有地区。该研究于2021年10月进行。这些问题的目的是确定权重,选择不同类型公共交通的原因,人们对这些类型的满意程度,评估服务质量和城市公共汽车运输的缺乏。调查参与者对公共交通工作的满意程度按性别和年龄组确定。随后,这项研究表明,大多数人口流动是通过公共汽车运输进行的。分析揭示了降低公交线路服务质量的因素。此外,它还研究了人们选择公共交通的原因,公共交通的缺点,公共汽车专用车道的有效性,以及对使用替代公共交通的态度。总之,这项研究成功地发现了城市公共交通的不足,改善了乘客服务,提高了乘客满意度,吸引了更多的人乘坐公共交通。
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引用次数: 1
OPTIMIZING SERVICE QUALITY MANAGEMENT OF THE BUS RAPID TRANSPORT SYSTEM IN LAGOS USING THE MULTI-CRITERIA DECISION ANALYSIS 基于多准则决策分析的拉各斯快速公交系统服务质量管理优化研究
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.1
S. O. Adebiyi, Oluwagbenga John Akinrinmade, B. B. Amole
Evaluation of Bus Rapid Transportation (BRT) based on service quality criteria and customer satisfaction can never be overemphasized due to its derivative, such as optimizing the performance of the transportation industry. Thus, this study employs the multi-criteria decision-making (MCDM) method for the evaluation of service quality and customer satisfaction of the BRT system in Nigeria using the fuzzy analytical hierarchy process (FAHP) and visekriterijumska optimizacija i kompromisno resenje (VIKOR), which are components of multi-criteria optimization and compromise solution to evaluate notable factors responsible for the user’s perspective. Research design is quantitative and analytical in nature through a survey of experts who are users of BRT services. Samples were drawn through a multi-stage sampling procedure and a total of 402 copies of questionnaires were administered to BRT users based on their experience with the system. Hence, VIKOR and FAHP methods are applied to analyse data retrieved from the field on services quality and performance level. The service quality (SERVQUAL) model (a multi-dimensional research instrument designed to capture consumer expectations and perceptions of service) was modified thereby generating six dimensions and thirty-six service criteria for this research. The FAHP method was employed to determine the weights of the decision criteria because there is a need to measure commuters’ perceptions and expectations based on numerical linguistic variables due to the vague, imprecise and complexity related to the nature of services. The criteria weights and responses of the survey analysis (data) related with the BRT are input for the VIKOR method for ranking. As measuring the perception of service quality based on crispy value can often be misleading, hence, the use of the fuzzy MCDM method can give a more realistic measurement. The result of the multi-criteria decision analysis revealed that pricing quality is the most relevant service quality dimension to users’ satisfaction, followed by the empathy quality dimension. The summary of strength and weakness areas of service quality discovered through the research and its managerial implications with recommendations were related to the appropriate authority in charge of the BRT system for improved performance.
基于服务质量标准和客户满意度的快速公交(BRT)评估无论怎么强调都不为过,因为它的衍生物,例如优化交通行业的绩效。因此,本研究采用多准则决策(MCDM)方法,使用模糊层次分析法(FAHP)和visekriterijumska optimizacija i kopromisino resenje(VIKOR)评估尼日利亚快速公交系统的服务质量和客户满意度,它们是多准则优化和折衷解决方案的组成部分,用于评估负责用户观点的显著因素。研究设计通过对快速公交服务用户专家的调查,具有定量和分析性质。通过多阶段抽样程序抽取样本,根据BRT用户使用该系统的经验,共向他们发放了402份问卷。因此,VIKOR和FAHP方法被应用于分析从现场检索到的关于服务质量和性能水平的数据。对服务质量(SERVQUAL)模型(一种旨在捕捉消费者对服务的期望和感知的多维研究工具)进行了修改,从而为本研究生成了六个维度和三十六个服务标准。采用FAHP方法来确定决策标准的权重,因为由于与服务性质相关的模糊、不精确和复杂性,需要基于数字语言变量来衡量通勤者的感知和期望。与BRT相关的调查分析(数据)的标准权重和响应被输入VIKOR方法进行排名。由于基于脆值来衡量对服务质量的感知往往会产生误导,因此,使用模糊MCDM方法可以给出更现实的衡量。多准则决策分析结果表明,定价质量是与用户满意度最相关的服务质量维度,其次是移情质量维度。通过研究发现的服务质量优势和薄弱环节的总结及其管理意义和建议与快速公交系统的相关主管部门有关,以提高绩效。
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引用次数: 0
A BALANCED PERFORMANCE MEASUREMENT SYSTEM FOR AUTOMOTIVE SPARE PARTS SUPPLY CHAIN 汽车零部件供应链平衡绩效评价系统
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.2
Zineb Achetoui, C. Mabrouki, A. Mousrij
This paper aims to provide a performance measurement system for the automotive spare parts supply chain. We focus on an independent distributor belonging to an independent channel. The framework encompasses different performance aspects for a high supply chain visibility, as well as the required categories, subcategories and key performance indicators for the automotive spare parts supply chain performance measurement. The framework is the first contribution that advances the performance measurement in the automotive aftermarket and allows assessing the performance of the automotive spare parts supply chain as a whole.
本文旨在为汽车零部件供应链提供一个性能测试系统。我们专注于属于独立渠道的独立分销商。该框架包括高供应链可见性的不同性能方面,以及汽车零部件供应链性能测量所需的类别、子类别和关键性能指标。该框架是推动汽车售后市场绩效衡量的第一个贡献,并允许评估整个汽车零部件供应链的绩效。
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引用次数: 0
APPLICATION OF THE CSI METHOD TO TEST CONSUMER SATISFACTION: A CASE STUDY OF PETROL STATIONS 应用csi方法测试消费者满意度:以加油站为例
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.7
A. Dudziak, M. Stoma, G. Zając
Conducting research on the quality of service and customer satisfaction is currently necessary for the proper and effective functioning of any organization. One of the organizations that have changed in recent years is petrol stations. In this paper, the Customer Satisfaction Index (CSI) is used to measure the quality of services and customer satisfaction. This research was carried out with the use of a proprietary questionnaire in which the respondents assessed the level of service at petrol stations. The obtained results allowed identifying the most important areas for the customers of petrol stations. In addition, the developed quality map indicated areas that should be given special attention, improved and those that are least important to customers. The conducted analyzes indicate that the CSI method used in this study is a tool that enables the assessment of customer satisfaction in a complex organization such as a petrol station.
目前,对服务质量和客户满意度进行研究对于任何组织的正常有效运作都是必要的。加油站是近年来发生变化的组织之一。在本文中,客户满意度指数(CSI)用于衡量服务质量和客户满意度。这项研究使用了一份专有的问卷,受访者在问卷中评估了加油站的服务水平。所获得的结果可以确定加油站客户最重要的区域。此外,开发的质量图指出了需要特别关注、改进的领域以及对客户最不重要的领域。所进行的分析表明,本研究中使用的CSI方法是一种能够在加油站等复杂组织中评估客户满意度的工具。
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引用次数: 2
AN INNOVATIVE METHOD IN MEASURING PERMEABILITY AND EVAPORATION PARAMETERS IN POROUS PAVEMENTS WITH EMPHASIS ON ITS EFFECTS ON INCREASING URBAN TRANSPORT SAFETY 一种测量多孔路面渗透性和蒸发参数的创新方法,重点研究其对提高城市交通安全的影响
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.8
Zohra GHAFOURI FARD, M. Khabiri, Pouya AFKHAMI MEYBODI
Today, the increasing development of urbanization and climate change and its resulting issues, including the occurrence of urban floods, is one of the important issues facing city managers. One of these problems that seriously affect lives today is the occurrence of floods and the inundation of urban thoroughfares. Among the problems of floods in urban areas are the disruption of the urban transportation system, reduced transportation safety, inundation of thoroughfares, and consequently, the poor appearance of urban roads. One of the successful strategies in controlling urban runoff is the use of porous pavements in urban thoroughfares. The two capabilities of permeability and evaporation of a porous pavement lead to reduced runoff and a resultant lack of occurrence of inundation of thoroughfares; therefore, accurate measurement of these two parameters is of special importance. This study aims to introduce two devices for measuring the permeability and evaporation of porous asphalt with an innovative method that can measure the permeability and evaporation of asphalt and porous concrete with appropriate accuracy.
今天,城市化和气候变化的日益发展及其引发的问题,包括城市洪水的发生,是城市管理者面临的重要问题之一。其中一个严重影响当今生活的问题是洪水的发生和城市大道的淹没。城市地区的洪水问题包括城市交通系统的破坏、交通安全性的降低、大道的淹没,以及因此导致的城市道路外观不佳。控制城市径流的成功策略之一是在城市大道中使用多孔路面。多孔路面的渗透性和蒸发性这两种能力导致径流减少,从而不会发生大道淹没;因此,准确测量这两个参数具有特别重要的意义。本研究旨在介绍两种测量多孔沥青渗透性和蒸发性的设备,一种创新的方法可以以适当的精度测量沥青和多孔混凝土的渗透性和蒸镀性。
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引用次数: 0
BUSINESS ENVIRONMENT OF RAIL TRANSPORT IN THE CONTEXT OF THE VALUE CHAIN 价值链背景下的铁路运输商业环境
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-09-01 DOI: 10.20858/sjsutst.2022.116.11
M. Krześniak, M. Jacyna, Piotr Pryciński, Jakub Murawski, Michał Bańka
The value chain can be defined as a set of all processes and procedures necessary to deliver a product or service to the end-user through various stages of development. A concept of the value chain is essential in the context of transport, as the transport process is usually one of the last elements of the value chain and determines the final value of a product or service offered. In recent years, the domestic and international rail transport market has undergone significant changes, including ongoing globalisation processes, growing importance of international trade, increase in intermodal transport significance, numerous investment outlays in transport infrastructure, means of transport, and the area of rail transport interoperability. All the above-described aspects have an impact on the value chain in transport. This paper presents an analysis of the value chain in transport processes in an aspect of rail transport. Elements of the railway transport organisation process, which affect the entire value chain, were briefly characterised in this article. Moreover, based on statistical data and a literature review, factors that fundamentally impact the efficient organisation of rail transport processes were identified.
价值链可以定义为通过不同的开发阶段向最终用户交付产品或服务所需的一组所有流程和程序。价值链的概念在运输方面至关重要,因为运输过程通常是价值链的最后要素之一,并决定所提供产品或服务的最终价值。近年来,国内外铁路运输市场发生了重大变化,包括持续的全球化进程、国际贸易日益重要、多式联运重要性的提高、运输基础设施、运输工具和铁路运输互操作性领域的大量投资支出。上述所有方面都对运输中的价值链产生影响。本文从铁路运输的角度分析了运输过程中的价值链。本文简要介绍了影响整个价值链的铁路运输组织过程的要素。此外,根据统计数据和文献综述,确定了从根本上影响铁路运输流程有效组织的因素。
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引用次数: 1
ACCURACY ANALYSIS OF AIRCRAFT POSITIONING USING GPS DUAL RECEIVERS IN AERIAL NAVIGATION 空中导航中GPS双接收机飞机定位精度分析
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-06-30 DOI: 10.20858/sjsutst.2022.115.2
K. Krasuski, A. Ciećko, D. Wierzbicki
This study presents a modified algorithm to determine the accuracy of GPS positioning in aerial navigation. To achieve this, a mixed model with measurement weights was used to determine the resultant value of accuracy of aerial vehicle positioning. The measurement weights were calculated as a function of the number of GPS tracking satellites. The calculations were performed on actual GPS measurement data recorded by two onboard GNSS receivers installed onboard a Cessna 172 aircraft. The flight test was conducted around the military airport in Dęblin. The conducted analyses demonstrated that the developed algorithm improved the accuracy of GPS positioning from 62 to 91% for horizontal coordinates and between 16-83% for the vertical component of the aerial vehicle position in the BLh ellipsoidal frame. The obtained test results show that the developed method improves the accuracy of aircraft position and could be applied in aerial navigation.
提出了一种改进的航空导航GPS定位精度确定算法。为此,采用带有测量权值的混合模型来确定飞行器定位精度的结果值。测量权值作为GPS跟踪卫星数的函数进行计算。计算是根据安装在塞斯纳172飞机上的两个机载GNSS接收器记录的实际GPS测量数据进行的。此次飞行试验是在Dęblin军用机场附近进行的。分析表明,该算法将飞行器在BLh椭球框架内的水平坐标定位精度提高了62% ~ 91%,垂直分量定位精度提高了16% ~ 83%。试验结果表明,该方法提高了飞机定位精度,可应用于航空导航。
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引用次数: 2
METHOD OF OCCUPANCY-BASED TRAFFIC LIGHT PRIORITY FOR PUBLIC TRANSPORT 基于占用率的公共交通红绿灯优先化方法
IF 0.6 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY Pub Date : 2022-06-30 DOI: 10.20858/sjsutst.2022.115.16
Remigiusz Wiedemann
This paper deals with the problem of urban traffic control, considering public transport as a priority. According to the authors, the occupancy of a means of transport is one of the key decision variables in the process of prioritisation within a traffic signal program. This study aims to construct a method of occupancy-based traffic light priority for public transport and investigate the possibility of using this information to increase the efficiency of signal control for time loss. The mathematical model of the priority level conditioning procedure proposed in the method was tested using a microsimulation model of the intersection. The simulation results were collated and compared with an approach that does not consider vehicle occupancy. Under given traffic conditions, the use of the proposed method allows for reducing the average time losses per person in the modelled road network.
本文研究了城市交通控制问题,将公共交通作为优先事项。根据作者的说法,交通工具的占用率是交通信号程序中优先顺序过程中的关键决策变量之一。本研究旨在构建一种基于占用率的公共交通红绿灯优先级方法,并研究利用该信息提高时间损失信号控制效率的可能性。使用交叉口的微观模拟模型对该方法中提出的优先级调节程序的数学模型进行了测试。对模拟结果进行了整理,并与不考虑车辆占用的方法进行了比较。在给定的交通条件下,使用所提出的方法可以减少建模道路网络中每人的平均时间损失。
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引用次数: 0
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Scientific Journal of Silesian University of Technology-Series Transport
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