scholarly journals Historical experience and prospects of corporatization of the Dnipropetrovsk electric locomotive plant (1988–2021)

2021 ◽  
Vol 2021 (54) ◽  
pp. 118-135
Author(s):  
Mykola Ruban ◽  
Keyword(s):  
Electric Vehicles ◽  
Structural Adjustment ◽  
Private Investment ◽  
Rolling Stock ◽  
Stock Exchanges ◽  
Electric Locomotive ◽  
Management Tools ◽  
Historical Experience ◽  
Wide Range ◽  
Technological Improvements

The article provides a retrospective analysis of the historical experience and problems of corporatization of the Dnipropetrovsk electric locomotive plant – a leading domestic manufacturer of industrial electric vehicles and railway rolling stock. The author traces historical circumstances of development and preconditions of diversification of production activity of the enterprise on the background of market economy in Ukraine and decrease in demand for narrowly specialized products. It was found out that during the 1990s–2000s the staff of SPA «DEVZ», having a promising research and production potential, mastered a wide range of production of mainline equipment to meet the needs of railways for innovative electric vehicles. However, due to low product quality and inefficient management system, the company is currently on the verge of bankruptcy, and its outdated design and technological improvements are not able to ensure competitiveness in the global railway market. It is proved that given the strategic importance of SE «DEVZ» for the national economy as the last profile locomotive company, its corporatization can be a real alternative to privatization, providing effective capitalization, financial and technological recovery and improving the culture of production with a state guarantee of preservation of the enterprise, as well as obtaining additional funds through the placement of securities on stock exchanges, and attracting private investment and innovation from international manufacturers. Further research on the historical aspects of the development of domestic engineering enterprises and their impact on the fleet of JSC «Ukrzaliznytsia» should be carried out taking into account the achievements of domestic science on the problems of structural adjustment of the economy and the use of modern strategic management tools.

scholarly journals Increasing the energy efficiency of auxiliary machines of AC electric locomotive

2021 ◽  
Vol 80 (5) ◽  
pp. 276-284
Author(s):  
Yu. M. Kulinich ◽  
S. A. Shukharev ◽  
A. V. Gulyaev
Keyword(s):  
Energy Efficiency ◽  
Vector Control ◽  
Control Method ◽  
Search Time ◽  
Energy Performance ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Engine Operation ◽  
Asynchronous Motors ◽  
Wide Range

Currently, an asynchronous variable frequency drive based on semiconductor converters is widely used due to the relative simplicity and reliability of the design. The use of digital microprocessor systems ensures high accuracy and flexibility of drive control. On the domestic rolling stock, the widespread introduction of asynchronous motors began to replace DC traction motors with sequential excitation. In particular, scalar-controlled asynchronous motors are used on serially produced 2TE25A diesel locomotives and EP20 electric locomotives. The auxiliary asynchronous machines of these locomotives are controlled by the vector control method. The use of a new type of engine on the rolling stock makes it possible to achieve a significant increase in the quality of consumed energy and reduce the consumption of electricity for traction of trains. Ensuring the energy efficiency of the drive in a wide range of loads requires further research. In this regard, the issue of saving energy resources becomes very urgent. The article proposes a vector control scheme for asynchronous motors of auxiliary machines of an electric locomotive, which implements an extreme method of control according to the criterion of minimizing the consumed current. The analysis of the engine operation is carried out based on its mathematical model in a rotating coordinate system d — q, which is implemented in the MatLab/Simulink software package. As a result of simulation modeling, it was found that the extreme control system with a variable step allows for each fixed value of the electromagnetic moment of the motor in the minimum time to find the optimal (extreme) value of the magnetic flux of the motor rotor, which corresponds to the minimum value of the stator current. The developed model of the motor with vector control is supplemented with an extreme regulator device, which allows achieving the best energy performance of the motor and reducing electrical losses in all operating modes with a minimum search time. The presented research results can be used in the development of energy-saving control systems for an asynchronous motor.

Key directions and methodological features of modern studies of land use changes

2019 ◽  
pp. 62-68
Author(s):  
Pavlo Kazmir ◽  
Lyubomyr Kazmir
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Scientific Discipline ◽  
Shared Responsibility ◽  
Management Tools ◽  
Land Change Science ◽  
Wide Range ◽  
Land Relations ◽  
Future Policy ◽  
Planning Methodology

Interest in land-use changes (LUC) research has been growing rapidly in recent years. This topic has already become the subject of a separate scientific discipline – land use science (or land change science). In order to formulate relevant future policy and develop appropriate land-use management tools, it is crucial to know how the LUC шьзфсе the environment and society condition. For Ukraine, where the structure of land use and the system of land resources management have significantly changed during the years of post-socialist transformation of land relations, the study of the LUC on a modern methodological basis is especially actual. The paper, based on a critical analysis of publications in leading international journals over the last thirty years, identifies key directions of LUC studies and analyzes their methodological features. There is a significant increase of the number of works based on the results of meta-studies and the use of a wide range of methods for modeling the LUC processes, their causes and possible consequences. The great "synergistic potential" of integration of the selected directions is noted, which makes it possible to accelerate the development of the general theory of land use and increase its use efficiency in substantiation of management decisions in the sphere of land use and modernization of the mechanisms of state land, spatial and ecological policies with consideration of existing and potential globalizing challenges. In this context, the key role of the land use integrated planning methodology at regional and local levels is emphasized. This methodology would require close cooperation between government, business and the public in developing a common vision for the implementation of specific land use plans and projects based on the principles of subsidiarity, participativity and shared responsibility.

INVESTMENTS IN THE LOCOMOTIVE COMPLEX INFRASTRUCTURE. INFRASTRUCTURE NEEDS PLANS AND FORECASTS

2020 ◽  
Vol 1 (4) ◽  
pp. 106-110
Author(s):  
A. G. YEROYAN ◽  
Keyword(s):  
Significant Role ◽  
Rolling Stock ◽  
Infrastructure Development ◽  
Electric Locomotive ◽  
Maintenance And Repair ◽  
Technological Readiness ◽  
Railway Industry ◽  
Locomotive Repair

In connection with the prospects for the development of the railway industry until 2030, a significant role in improving the technological readiness of maintenance and repair of traction rolling stock belongs to diesel, electric locomotive repair and service depots. The article considers the main directions of development and modernization of the locomotive complex infrastructure. Possible methods of financing mechanisms for investment in infrastructure development have been identified.

scholarly journals A review on design and testing methodologies of modern freight train draft gear system

2021 ◽  
Author(s):  
Simon Wagner ◽  
Colin Cole ◽  
Maksym Spiryagin
Keyword(s):  
Soviet Union ◽  
South America ◽  
Former Soviet Union ◽  
Rolling Stock ◽  
Freight Train ◽  
Wide Range ◽  
Draft Gear ◽  
Design And Testing ◽  
Damping Systems ◽  
The Eu

AbstractRolling stock connection systems are key to running longer and heavier trains as they provide both the connections of vehicles and the damping, providing the longitudinal suspension of the train. This paper focuses on the evolution of both connection and stiffness damping systems. Focus is on freight rolling stock, but passenger draw gears are also examined. It was found that connection systems have evolved from the buff and chain system used in the pioneer railways of the 1800s to the modern auto-coupler connection systems that are in-service worldwide today. Refined versions of the buff and chain coupling are, however, still in use in the EU, UK, South America and India. A wide range of auto-coupler systems are currently utilised, but the AAR coupler (Janney coupler) remains the most popular. A further variation that persists is the SA3 coupler (improved Wilson coupler) which is an alternative auto-coupler design used mainly throughout the former Soviet Union. Restricting the review to auto-coupler systems allowed the paper to focus on draft gears which revealed polymer, polymer-friction, steel spring-friction, hydraulic draft gears and sliding sill cushioning systems. Along with the single compressive draft gear units balanced and floating plate configurations are also presented. Typical draft gear acceptance standards are presented along with modelling that was included to aid in presentation of the functional characteristics of draft gears.

Constructing New Product Development for the DC Cooling Fan Industry: ISO/TS16949 Procedures

2013 ◽  
Vol 470 ◽  
pp. 392-395
Author(s):  
Tzu Chuan Chou ◽  
Sheng Hsiung Wu ◽  
Ming Hung Shu
Keyword(s):  
Product Development ◽  
New Product Development ◽  
Developmental Process ◽  
New Product ◽  
Management Tools ◽  
Market Shares ◽  
Sales And Marketing ◽  
Wide Range ◽  
Cooling Fans ◽  
Customer Services

Applications of DC cooling fans in auto electronics cover a wide range of areas. Since they all need to meet the requirement of the clients in providing customized products, many product combinations have been developed. In the past, when DC cooling fans manufacturers have not implemented the requirements of TS16949 and the core tools, their developmental process could only meet the spirit of process-orientation suggested by ISO9001. There was an obvious deficiency in terms of the quality management tools during the development and manufacturing processes, as well as the development information that should be produced; therefore, they were unable to meet the requirements of TS16949. This study constructs a new product development (NPD) procedure through the application of the five core tools that meets the requirements of TS16949, and satisfies the characteristics of the DC cooling fans industry. With this process, the Taiwanese DC cooling fans industry can effectively control the entire production process, from sales and marketing, R&D, manufacturing, to customer services. Moreover, the manufacturers could not only elevate their ability to self-manage, but also meet the requirements and gain market shares in the international automobile supply chain.

scholarly journals Thermal Battery for Electric Vehicles: High-Temperature Heating System for Solid Media Based Thermal Energy Storages

2021 ◽  
Vol 11 (21) ◽  
pp. 10500
Author(s):  
Volker Dreißigacker
Keyword(s):  
Heat Transfer ◽  
Electric Vehicles ◽  
Thermal Energy ◽  
Storage Systems ◽  
Storage System ◽  
Wire Surface ◽  
Heating Wire ◽  
Wide Range ◽  
High Storage ◽  
Surface Loads

Thermal energy storage systems open up high potentials for improvements in efficiency and flexibility for power plant and industrial applications. Transferring such technologies as basis for thermal management concepts in battery-electric vehicles allow alternative ways for heating the interior and avoid range limitations during cold seasons. The idea of such concepts is to generate heat electrically (power-to-heat) parallel of charging the battery, store it efficiently and discharge heat at a defined temperature level. The successful application of such concepts requires two central prerequisites: higher systemic storage densities compared to today’s battery-powered PTC heaters as well as high charging and discharging powers. A promising approach for both requirements is based on solids as thermal energy storage. These allow during discharging an efficient heat transfer to the gaseous heat transfer medium (air) due to a wide range of geometric configurations with high specific surfaces and during charging high storage densities due to use of ceramic materials suitable for high operating temperatures. However, for such concepts suitable heating systems with small dimensions are needed, allowing an efficient and homogeneous heat transfer to the solid with high charging powers and high heating temperatures. An appropriate technology for this purpose is based on resistance heating wires integrated inside the channel shaped solids. These promise high storage densities due to operating wire temperature of up to 1300 °C and an efficient heat transport via radiation. Such electrically heated storage systems have been known for a long time for stationary applications, e.g., domestic storage heaters, but are new for mobile applications. For evaluation such concepts with regard to systemic storage and power density as well as to identify preferred configurations extensive investigations are necessary. For this purpose, transient models for the relevant heat transport mechanisms and the whole storage system were created. In order to allow time-efficient simulations studies for such an electrical heated storage system, a novel correlation for the effective radiation coefficient based on the Fourier Number was derived. This coefficient includes radiation effects and thermal conduction resistances and enables through its dimensionless parameterization the investigation of the charging process for a wide range of geometrical configurations. Based on application-typical specifications and the derived Fourier based correlation, extensive variation studies regarding the storage system were performed and evaluated with respect to systemic storage densities, heating wire surface loads and dimensions. For a favored design option selected here, maximum systemic storage densities of 201 Wh/kg at maximum heating wire surface loads of 4.6 W/cm2 are achieved showing significant benefits compared to today’s battery powered PTC heaters. Additionally, for proofing and confirming the storage concept, a test rig was erected focusing experimental investigations on the charging process. For a first experimental setup-up including all relevant components, mean temperature-related deviations between the simulative and the experimental results of 4.1% were detected and storage temperatures of up to 870 °C were reached. The systematically performed results confirm the feasibility, high efficiency, thermodynamic synergies with geometric requirements during thermal discharging and the potential of the technology to reach higher systemic storage densities compared to current solutions.

scholarly journals Understanding the Future Impacts of Electric Vehicles—An Analysis of Multiple Factors That Influence the Market

Vehicles ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 851-871
Author(s):  
Jonathan Wellings ◽  
David Greenwood ◽  
Stuart R. Coles
Keyword(s):  
Electric Vehicle ◽  
Electric Vehicles ◽  
Ethical Issues ◽  
Raw Materials ◽  
New Technology ◽  
Vast Number ◽  
Wide Range ◽  
Key Issues ◽  
The Impact ◽  
Vehicle Market

The electric vehicle market is an increasingly important aspect of the automotive industry. However, as a relatively new technology, several issues remain present within the industry. An analysis is utilised to examine these issues, along with how they affect the industry and how they can be tackled. Several key issues that affect the electric vehicle market, as well as how efforts to address these issues influence the market, are identified. The analysis also includes the examination of ethical issues, with the issues that arise from the production of raw materials for electric vehicles. The analysis and examination of ethical issues display a wide range of problems in the industry. However, it did highlight the efforts being made to lessen the effect of these problems by various groups, such as regulation by EU and US governing bodies on the materials mined. From this analysis, this paper identifies that many of the other factors examined are directly or indirectly influenced by political and economic factors, also examined in this review. This highlights the impact that governing bodies and businesses have on a vast number of issues that are present within the market and how they can resolve the harmful factors examined.

scholarly journals On the Issue of Regulatory Support for Passenger Electric Vehicles Operation

2020 ◽  
Vol 18 (1) ◽  
pp. 196-211
Author(s):  
M. A. Kudryashov ◽  
A. V. Prokopenkov ◽  
R. S. Ayriev
Keyword(s):  
Electric Vehicles ◽  
Environmentally Friendly ◽  
Economic Assessment ◽  
Intermediate Stage ◽  
Transport Infrastructure ◽  
Rolling Stock ◽  
Electric Transport ◽  
Electric Bus ◽  
Environmental Goals ◽  
Charging Stations

The article provides the results of an intermediate stage of research on development of a project to create infrastructure for operation of highly environmentally friendly electric vehicles. The transition to electric transport is one of the promising methods to solve the problem of emissions and achieve environmental goals. An electric bus is a relatively new type of rolling stock, requiring a balanced and objective justification for selection of certain possible options for technical, technological, economic and other aspects of organisation of its operation. To achieve the goal of developing a project to create infrastructure for operation of environmentally friendly electric vehicles, an initial analysis of legal acts, technical characteristics of electric buses and the parking and on route infrastructure approaches to organizing transportation by electric buses with various charging concepts was performed. The analysis of the concepts of charging electric bus batteries allowed to divide them into 5 classes and group into 3 groups according to charging speed. An analysis of the required infrastructure for operation of electric buses showed that conceptually there are 2 types of charging stations. The calculations and evaluation of various options for organizing operation of electric buses on a fixed route with various concepts of charging were performed. A necessary direction for further research is economic assessment of operation of electric buses with various charging concepts and the necessary transport infrastructure. The methods used include analysis, evaluation of previously performed analytical studies, legal acts and a synthesis of domestic and foreign experience.

JuTrack: A Digital Biomarker Platform for Remote Monitoring in Neuropsychiatric and Psychiatric Diseases (Preprint)

2021 ◽  
Author(s):  
Mehran Sahandi Far ◽  
Michael Stolz ◽  
Jona Marcus Fischer ◽  
Simon B Eickhoff ◽  
Juergen Dukart
Keyword(s):  
Data Management ◽  
Open Source ◽  
Remote Monitoring ◽  
Daily Life ◽  
Smartphone Application ◽  
Valuable Insight ◽  
Motion Sensors ◽  
Management Tools ◽  
General Data Protection Regulation ◽  
Wide Range

BACKGROUND Health-related data being collected by smartphones offer a promising complementary approach to in-clinic assessments. OBJECTIVE Here we introduce the JuTrack platform as a secure, reliable and extendable open-source solution for remote monitoring in daily-life and digital phenotyping. METHODS JuTrack consists of an Android-based smartphone application and a web-based project management dashboard. A wide range of anonymized measurements from motion-sensors, social and physical activities and geolocation information can be collected in either active or passive modes. The dashboard also provides management tools to monitor and manage data collection across studies. To facilitate scaling, reproducibility, data management and sharing we integrated DataLad as a data management infrastructure. JuTrack was developed to comply with security, privacy and the General Data Protection Regulation (GDPR) requirements. RESULTS JuTrack is an open-source (released under open-source Apache 2.0 licenses) platform for remote assessment of digital biomarkers (DB) in neurological, psychiatric and other indications. The main components of the JuTrack platform and examples of data being collected using JuTrack are presented here. CONCLUSIONS Smartphone-based Digital Biomarker data may provide valuable insight into daily life behaviour in health and disease. JuTrack provides an easy and reliable open-source solution for collection of such data.

Big Data, Dashboards, and Data-Driven Educational Decision Making

2017 ◽  
pp. 1314-1325 ◽  
Author(s):  
Todd Price
Keyword(s):  
Decision Making ◽  
Performance Management ◽  
Computer Software ◽  
Educational Leaders ◽  
Course Delivery ◽  
Online Learners ◽  
Management Tools ◽  
Online Delivery ◽  
Wide Range ◽  
Educational Decision Making

Business Intelligence (BI) performance dashboards are reliant computer software solutions that enable leaders or companies to gain insight into its critical operations through reporting applications and analysis tools. These management tools gauge performance and progress toward specific operational goals. Fortuitously, educational leaders now have access to dashboards which can be designed and developed to address a wide range of objectives, from monitoring whether online course delivery outcomes are being met by the learner. Conversely, online learners can view their performance with a course dashboard that compares their performance vis-à-vis peers. By merging performance dashboards with online delivery, it is expected that performance goals will be impacted positively. Encyclopedia of Strategic Leadership and Management topics for this chapter include, but are not limited to, the following: Management, the ways CEOs lead, performance management, managing creativity, and decision making and leadership.

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