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Browsing by Author Barta, Dalibor:

  • Barta, Dalibor; Mruzek, Martin (Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 2014)
    One of the most frequent topics of professional community is the ecology of transport. Different types of transport need individual approach to design suitable drive of vehicles. At design of public transport vehicles drives it is important to work with parameters close to the real conditions of using the drive or with real measured parameters. It helps to find the best conception of the drive and so reduce the consumptions of energy and the production of air pollutants. Energy intensity of the vehicle is usually determined on the basis of a driving simulation based on driving cycles for fuel consumption and harmful emissions measuring. These driving cycles are simplified and do not include the grading resistance, therefore, they are insufficient to determine certain specific conditions. Compilation of driving simulation based on real driving cycles measured during the vehicle driving in urban traffic seems to be more appropriate for specific vehicles, such as buses for public transport are. The aim of this paper is to show to what extent the use of standard driving cycles for the design of electric drives, respectively hybrid drives of vehicles, is consistent with real conditions.
  • Galliková, Jana; Grenčík, Juraj; Barta, Dalibor; Barlok, Matej (Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie, )
    This study investigates FMECA analysis and its potential use in improving the reliability and maintenance of the thermal deburring machine in a manufacturing company located in Slovakia. In the beginning, an overview of the FMEA/FMECA methods and their utilization for increased reliability are discussed. As a practical solution, the deburring machine EXTRUDE HONE TEM P-350 was chosen. Functions of its systems and components, thermal deburring process, its characteristics and in practice application are described. Maintenance policy in the company and the current state of maintenance of the machine are also presented. In addition, the study includes failure analysis which evaluates the riskiest systems of the machine. One element, hydraulic unit, is a subject for the FMECA analysis which envisions the assessment of the current failure modes using risk priority number (RPN) and proposals of prevention and detection action reducing the level of RPN. The final section focuses on influencing and improving maintenance and summarizing the potential benefits of FMECA Analysis for company and machine operation.

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