Igor Kabashkin

FREIGHT TRANSPORT LOGISTICS IN THE BALTIC SEA REGION. REGIONAL ASPECTS

Freight Transport Logistics in the Baltic Sea Region. Regional Aspects In the situation where a large increase in trade and freight transport volumes in the Baltic Sea Region (BSR) is expected and in which the BSR is facing a major economic restructuring, efforts to achieve more integrated and sustainable transport and communication links within the BSR are needed. One of these efforts is the development of logistics centres (LCs) and their networking, which will continue to have an impact on improving communication links, spatial planning practices and approaches, logistics chain development and the promotion of sustainable transport modes. These factors will reflect on logistics processes both in major gateway cities and in remote BSR areas. The importance of logistics systems as a whole is not seen clearly enough. Logistics actors see that logistics operations are not appreciated as much as other fields of activity. In addition, logistics centres and the importance of logistics activities to the business life of areas and the employment rate should be brought up better. In the paper main goal and tasks of national approach for LCs development are discussed. Strategic focus of new activities in this area is on the integration of various networks within and between logistics centres in order to improve and develop the quality of logistics networks as well as to spatially widen the networking activities.

Development of the Model of Decision Support for Alternative Choice in the Transportation Transit System

Abstract The decision support system is one of the instruments for choosing the most effective decision for cargo owner in constant fluctuated business environment. The objective of this Paper is to suggest the multiple-criteria approach for evaluation and choice the alternatives of cargo transportation in the large scale transportation transit system for the decision makers - cargo owners. The large scale transportation transit system is presented by directed finite graph. Each of 57 alternatives is represented by the set of key performance indicators Kvi and set of parameters Paj. There has been developed a two-level hierarchy system of criteria with ranging expert evaluations based on Analytic Hierarchy Process Method. The best alternatives were suggested according to this method.

Tyre Footprint Geometric Form Reconstruction by Fibre-Optic Sensor’s Data in the Vehicle Weight-in-Motion Estimation Problem

The problem of measuring road vehicle’s weight-in-motion (WIM) is important for overload enforcement, road maintenance planning and cargo fleet managing, control of the legal use of the transport infrastructure, road surface protection from the early destruction and for the safety on the roads. The fibre-optic sensors (FOS) functionality is based on the changes in the transparency of the optical cable due to the deformation of the optical fibre under the weight of the crossing vehicle. It is necessary for WIM measurements to estimate the impact area of a wheel on the working surface of the sensor called tyre footprint. Recorded signals from a truck passing over a group of FOS with various speeds and known weight are used as an input data. The results of the several laboratory and field experiments with FOS, e.g. load characteristics according to the temperature, contact surface width and loading speed impact, are provided here. The method of decomposition of input signal into symmetric and asymmetric components provides the chance to approximate geometric size of tyre surface footprint as well as calculate the weight on each wheel separately. The examples of the estimation of a truck tyre surface footprint using FOS signals, some sources of errors and limitations of possible application for WIM are discussed in this article.

Reliability Model of Intelligent Transport Systems

Transport telematics or intelligent transport systems (ITS) include a lot of tools and services from information and communication technologies. The paper presents an approach for ITS reliability analysis with evaluation petri net modelling with many specific aspects of reliability analysis and modelling: multilevel structural hierarchy; multifunctional objects of modelling; different nature of failures (hardware, software, human, organizational); heterogeneous components of the modelling system; open structure of ITS architecture and its model and others. The dynamic behaviour of the reliability model at various levels of abstraction is discussed on the base of analytical properties of Petri Net.

Condition Monitoring Of Operating Pipelines With Operational Modal Analysis Application

Abstract In the petroleum, natural gas and petrochemical industries, great attention is being paid to safety, reliability and maintainability of equipment. There are a number of technologies to monitor, control, and maintain gas, oil, water, and sewer pipelines. The paper focuses on operational modal analysis (OMA) application for condition monitoring of operating pipelines. Special focus is on the topicality of OMA for definition of the dynamic features of the pipeline (frequencies and mode shapes) in operation. The research was conducted using two operating laboratory models imitated a part of the operating pipeline. The results of finite-element modeling, identification of pipe natural modes and its modification under the influence of virtual failure are discussed. The work considers the results of experimental research of dynamic behavior of the operating pipe models using one of OMA techniques and comparing dynamic properties with the modeled data. The study results demonstrate sensitivity of modal shape parameters to modification of operating pipeline technical state. Two strategies of pipeline repair – with continuously condition-based monitoring with proposed technology and without such monitoring, was discussed. Markov chain reliability models for each strategy were analyzed and reliability improvement factor for proposed technology of monitoring in compare with traditional one was evaluated. It is resumed about ability of operating pipeline condition monitoring by measuring dynamic deformations of the operating pipe and OMA techniques application for dynamic properties extraction.

Weight-in-Motion Estimation Based on Reconstruction of Tyre Footprint’s Geometry by Group of Fibre Optic Sensors

Abstract The problem of measuring road vehicle’s weight-in-motion (WIM) is important for overload enforcement, road maintenance planning and cargo fleet managing, control of the legal use of the transport infrastructure, road surface protection from the early destruction and for the safety on the roads. The fibre-optic sensors (FOS) functionality is based on the changes in the parameters of the optical signal due to the deformation of the optical fibre under the weight of the crossing vehicle. A fibre-optic sensor responds to the deformation, therefore for WIM measurements it is necessary to estimate the impact area of a wheel on the working surface of the sensor called tyre footprint. This information is used further for the estimation of the vehicle wheel’s speed, contact width, length, and, finally, axle’s weight while in motion. Recorded signals from a truck passing over a group of FOS with various speeds and known weight are used as an input data. The results of the several laboratory and field experiments with FOS, e.g. load characteristics according to the temperature, contact surface width and loading speed impact, are provided here. The method of initial signal deconvolution on symmetric and asymmetric components provides the chance to approximate geometric size of tyre surface footprint as well as calculate weight on each wheel separately. The examples of the estimation of a truck speed, tyre contact surface footprint parameters using FOS signals are discussed in this article.

Effectiveness of Redundancy in Communication Network of Air Traffic Management System

Air Traffic Management (ATM) systems represent essential infrastructure that is critical for flight safety. Communication is a key element in the present ATM system. Communication between air traffic controllers and pilots remains a vital part of air traffic control operations, and communication problems can result in hazardous situations. The modern ATM system has independent direct communication channels (CC) for each controllers operating at different radio frequencies. Currently, the main method of improving the reliability of controller’s CC is duplication of equipment to provide communications on each frequency of interaction ground-to-air channel. Unfortunately the economic efficiency of used fault-tolerance approach is low. In the paper the reliability of selected communication channels with common set of standby radio station in the system with periodical sessions of communications for real conditions of ATM is discussed. Mathematical model of the channel reliability is developed. Comparative analysis of redundancy effectiveness for developed and used structure of communication network is performed.

Building on European scientific excellence to develop an educational program on intermodal connections for Latvia and the region

Economic and social factors, including existing trends in urban population and employment growth combined with urbanization, have led to enhanced consumption and thus, increasing freight flows in the cities. Mitigation of transport impacts has led to plans towards a more sustainable urban environment. However, managerial and regulatory barriers restrict the incorporation of technological instruments and solutions to the sustainable dimension of decision-making and planning. This paper has sought to bridge this gap by organizing an educational and training program, which involves the participation of todays and tomorrow’s researchers, decision-makers and practitioners. Towards this direction, a methodology is developed that identifies existing gaps between the transport industry and the existing research, education and training programs and converts identified requirements and gaps into training courses. The paper addresses the context of intermodal interconnections for the case of Latvia and the region for stimulating and strengthening its scientific and technological capacity by providing knowledge in the field of smart interconnecting sustainable transport networks. The 2-level gap analysis that was developed and implemented with respect to the thematic areas of (1) ‘Governance and policy development’, (2) ‘Smart solutions’, and (3) ‘Decision-making’, and the validation process that followed, has revealed several requirements that exist currently for passenger and freight interchanges and educational programs for Latvia and the region. Based on the identified educational requirements for Latvia and the region, 20 educational areas were created that resulted in 12 courses for passenger and freight transport interchanges that are going to be used for training and education in Latvia.

Analysing of the Voice Communication Channels for Ground Segment of Air Traffic Management System Based on Embedded Cloud Technology

Air Traffic Management (ATM) systems represent essential infrastructure that is critical for flight safety. Communication is a key element in the present ATM system. Communication between air traffic controllers and pilots remains a vital part of air traffic control operations, and communication problems can result in hazardous situations. ATM modernization requests for a paradigm shift away from voice towards digital data communications. In the paper the reliability of ATM voice communication system (VCS) on the base of embedded cloud technology is discussed. Mathematical model of the channel reliability in the ATM communication network based on embedded cloud technology in the real conditions of operation is developed. On the base of developed model the boundary value of reliability parameters for automatics of VCS embedded cloud in different failure modes is analyzed.

Resilient communication network of Air Traffic Management system

Air Traffic Management (ATM) systems represent essential infrastructure that is critical for flight safety. Communication is a key element in the present ATM system. Communication between air traffic controllers and pilots remains a vital part of air traffic control operations, and communication problems can result in hazardous situations. The modern ATM system has independent direct communication channels (CC) for each controllers operating at different radio frequencies. Currently, the main method of improving the reliability of controllers CC is redundancy of equipment to provide communications on each frequency of interaction ground-to-air channel. The fault tolerance of such method is limited by number of redundancy elements. ATM communication network has periodical sessions of communications with relatively short active periods of communication interactions alternate with relatively long pauses in the translation of signals. The resilience of such network can be improved by dynamic distribution of communication equipment for operation in different channels during communication sessions. In paper the reliability of resilient Air Traffic Management voice communication network with periodical sessions of communications for real conditions of ATM and with a common set of radio stations without their division into the main and backup elements is investigated. Mathematical model of the channel reliability is developed. Comparative analysis of reliability for proposed network architecture and traditional redundant structure of communication network is performed.