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Transport Problems

Silesian University of Technology

Subject: Economics , Transportation , Transportation Science & Technology

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ISSN: 1896-0596
eISSN: 2300-861X

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FEATURED ARTICLES

SIMULATION OF THE ROUTE NETWORK AND FERRY TRAFFIC INTENSITY BASED ON THE PROCESS OF DISCRETIZATION AND CIRCOS PLOT INTENSITY DIAGRAM
DEVELOPMENT AND IMPLEMENTATION OF RETRO-REFLECTIVE ELEMENTS FOR AUTOMATIC ACCESSORIES AND PLACES OF PLANNED POINTS
ADAPTATION OF THE SERVQUAL METHOD FOR TESTING THE QUALITY OF PASSENGER AIR SERVICES
A Study of the Dynamic Parameters Influence over the Behavior of the Two-Section Articulated Vehicle during the Lane Change Manoeuvre

VOLUME 10 , ISSUE 3 (September 2015) - List of articles

Study of the asynchronous traction drive's operating modes by computer simulation. Part 2: simulation results and analysis

Pavel KOLPAHCHYAN/ Alexander ZARIFYAN Jr

The problem arising at the design of electric locomotives with asynchronous traction drive are considered. The electrical scheme provides the possibility of individual (by axle) control of traction motors. This allows realizing the operational discon-nection/connection of one or more axles in the automatic mode, with account of actual load. In Part 1 of this paper, the complex computer model based on the representation of AC traction drive as controlled electromechanical system was developed. Th(..)

DOI: 10.21307/tp-2015-029

Solar energised transport solution and customer preferences and opinions about alternative fuel Vehicles – the case of slovenia

Matjaž KNEZ/ Marjan STERNAD

Authorities in Slovenia and other EU member states are confronted with problems of city transportation. Fossil-fuel based transport poses two chief problems – local and global pollution, and dwindling supplies and ever increasing costs. An elegant solution is to gradually replace the present automobile fleet with low emission vehicles. This article first explores the economics and practical viability of the provision of solar electricity for the charging of electric vehicles by installation of e(..)

DOI: 10.21307/tp-2015-030

Compact vertical take-off and landing aerial vehicle for monitoring tasks in dense urban areas

Sergii FIRSOV/ Igor KULIK

Using of aerial vehicles with onboard sensory and broadcasting apparatus for monitoring a variety of objects and processes in inaccessible places of the city. A hardware and software package for the task solving is proposed in the article. Presented vehicle is a vertical take-off and landing airplane of tail-sitter type.

DOI: 10.21307/tp-2015-031

Model of geophysical fields representation in problems of complex correlation-extreme navigation

Volodymyr KHARCHENKO/ Maryna MUKHINA

A model of the optimal representation of spatial data for the task of complex correlation-extreme navigation is developed based on the criterion of minimum deviation of the correlation functions of the original and the resulting fields. Calculations are presented for one-dimensional case using the approximation of the correlation function by Fourier series. It is shown that in the presence of different geophysical map data fields their representation is possible by single template with optimal s(..)

DOI: 10.21307/tp-2015-032

The sophisticated control of the tram bogie on track

Radovan DOLECEK/ Ondrej CERNY/ Ivo DRAHOTSKY

The paper deals with the problems of routing control algorithms of new conception of tram vehicle bogie. The main goal of these research activities is wear reduction of rail wheels and tracks, wear reduction of traction energy losses and increasing of running comfort. The testing experimental tram vehicle with special bogie construction powered by traction battery is utilized for these purposes. This vehicle has a rotary bogie with independent rotating wheels driven by permanent magnets synchron(..)

DOI: 10.21307/tp-2015-033

Research of influence of time of reaction of the driver on the calculation of the capacity of the highway

Anastasiya SHEVTSOVA/ Ivan NOVIKOV/ Alexey BOROVSKOY

In the work we performed a review of studies of foreign scholars on changing the reaction time of the driver depending on various road conditions, namely the change in the response time when using the traffic light regulation. Earlier by the authors of this article have already been carried out research in the field of throughput of a site of a highway with traffic regulation, which showed that this value depends on the time of reaction of the driver. In this article the estimation of how much b(..)

DOI: 10.21307/tp-2015-034

Hydrant refueling system as an optimisation of aircraft refuelling

Martin HROMÁDKA/ Andrej CÍGER

At large international airports, aircraft can be refuelled either by fuel trucks or using dedicated underground pipeline systems. The latter, hydrant refuelling, is considered to be an optimal fuelling method as it increases safety, shortens the aircraft turnaround time and cuts the overall costs. However, at smaller airports, implementation of this system can lead to high investment costs. Thus, the paper discusses the airport size from which this system may be efficient to implement. Various d(..)

DOI: 10.21307/tp-2015-035

The wheel-rail contact friction influence on high speed vehicle model stability

Mirosław DUSZA

Right estimating of the coefficient of friction between the wheel and rail is essential in modelling rail vehicle dynamics. Constant value of coefficient of friction is the typical assumption in theoretical studies. But it is obvious that in real circumstances a few factors may have significant influence on the rails surface condition and this way on the coefficient of friction value. For example the weather condition, the railway location etc. Influence of the coefficient of friction changes on(..)

DOI: 10.21307/tp-2015-036

The use of modern information technology in research on transport accessibility

Bartosz BARTOSIEWICZ/ Szymon WIŚNIEWSKI

Transport accessibility can be analyzed using a number of different methods. The problem with each of them is the difficulty of obtaining data to measure this phenomenon The focus of this article and its main goal are to present methods and tools for gathering data on road traffic; thanks to modern information technology, it is possible to collect real data without the need for large-scale and highly capital-intensive measurements. The application of modern information technology (IT) presented (..)

DOI: 10.21307/tp-2015-037

Main conditions and effectiveness of gas fuel use for powering of dual fuel IC self-ignition engine

Stefan POSTRZEDNIK/ Grzegorz PRZYBYŁA/ Zbigniew ŻMUDKA

Internal combustion engines are fuelled mostly with liquid fuels (gasoline, diesel). Nowadays the gaseous fuels are applied as driving fuel of combustion engines. In case of spark ignition engines the liquid fuel (petrol) can be totally replaced by the gas fuels. This possibility in case of compression engines is essentially restricted through the higher self-ignition temperatures of the combustible gases in comparison to classical die-sel oil. Solution if this problem can be achieved by using o(..)

DOI: 10.21307/tp-2015-038

Measuring the quality impacts on the performance in transport company

Ivana ŠIMKOVÁ/ Vladimír KONEČNÝ/ Štefan LIŠČÁK/ Ondrej STOPKA

The paper deals with the problem of service quality, quantification of the level of quality and evaluation of service quality in freight road transport companies. The impact of the transport service quality on the performance of road freight transport is necessary to quantify a level of service quality but also define and objectively evaluate the performance of road freight transport with the help of an appropriate set of performance indicators and methods. For examining relation and quantificat(..)

DOI: 10.21307/tp-2015-039

Robust p-median problem in changing networks

Štefan PEŠKO/ Tomáš MAJER

The robust p-median problem in changing networks is a version of known discrete p-median problem in network with uncertain edge lengths where uncertainty is characterised by given interval. The uncertainty in edge lengths may appear in travel time along the edges in any network location problem. Several possible future scenarios with respect to the lengths of edges are presented. The planner will want a strategy of positioning p medians that will be working “as well as possible" over the future (..)

DOI: 10.21307/tp-2015-040

A study on electric bicycle energy efficiency

Ivan EVTIMOV/ Rosen IVANOV/ Gergana STANEVA/ Georgi KADIKYANOV

The paper presents a construction of an experimental electric bicycle for evaluation of the energy efficiency. The bicycle is equipped with onboard computer which can store the information about motion and energy consumption. The result concerning power, energy consumption, recharging during brake process, etc. are given. Energy consumption for 3 typical city routes is studied.

DOI: 10.21307/tp-2015-041

Multicriteria vehicle routing problem solved by artificial immune system

Bogna MRÓWCZYŃSKA

Vehicles route planning in large transportation companies, where drivers are workers, usually takes place on the basis of experience or intuition of the employees. Because of the cost and environmental protection, it is important to save fuel, thus planning routes in an optimal way. In this article an example of the problem is presented solving delivery vans route planning taking into account the distance and travel time within the constraints of vehicle capacities, restrictions on working time (..)

DOI: 10.21307/tp-2015-042

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