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Catalog Publications

Year 2014
Year 2003
Year 2013
Year 2018
Year 2021
  • Current divider-based nanosecond high current pulse measuring systems
    Publication

    This paper presents the analysis of the new approach to the measurement methodology of significant values (in order of hundreds of kA) and huge steepness (in order of MA/μs) current pulses based on current dividers along with a comparison of the various types transducers suitability in measuring systems with such extreme parameters. Such dividers are used to extend the measurement ranges of current transducers with limited current...

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Year 2019
  • Damage Detection in the Wind Turbine Blade Using Root Mean Square and Experimental Modal Parameters
    Publication

    The paper presents results of an experimental study related to a non-destructive diagnostic technique used for preliminary determination the location and size of delamination in composite coatings of wind turbine blades. The proposed method of damage detection is based on the analysis of the ten first mode shapes of bending vibrations, which correspond to displacements of rotor blades perpendicular to the rotor plane. Modal parameters...

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  • Impulse Impedance Measurements of Lightning Protection Earthings
    Publication

    - Year 2019

    Lightning protection earthing systems should be tested at currents with time parameters similar to those of lightnings. A method and definition of a measured value of impulse impedance are introduced. The impulse impedance was determined by a quotient of voltage drop on the tested earthing to a value of current in measure circuit. The usefulness of the impulse method for lightning protection evaluation is tested on radio base stations...

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Year 2016
  • Detection of damages in a rivetted plate
    Publication

    The paper presents the results of damage detection in a riveted aluminium plate. The detection method has been based on Lamb wave propagation. The plate has been analysed numerically and experimentally. Numerical calculations have been carried out by the use of the time-domain spectral finite element method, while for the experimental analysis laser scanning Doppler vibrometry (LSDV) has been utilised. The panel has been excited...

  • Important Facts and Observations about Pairwise Comparisons (the special issue edition)
    Publication
    • W. W. Koczkodaj
    • L. Mikhailov
    • G. Redlarski
    • M. Soltys
    • J. Szybowski
    • G. Tamazian
    • E. Wajch
    • K. K. F. Yuen

    - FUNDAMENTA INFORMATICAE - Year 2016

    This study has been inspired by numerous requests for clarification from researchers who often confuse Saaty’s Analytic Hierarchy Process (AHP) with the pairwise comparisons (PC) method, taking AHP as the only representation of PC. This study should be regarded as an interpretation and clarification of past investigations of PC. In addition, this article is a reflection on general PC research at a higher level of abstraction: the...

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  • Influence of span length and impulse front time on earthing measurement accuracy of power line towers
    Publication

    The article discusses the issue of measuring and assessing the features of power line tower earthings using fast-changing waveform. The study analyses the effect of impulse front time and the line span length on errors made during these measurements using impulse meters. It has been found that the assessment conditions similar to the static measurement results occur for the use of 4 μs current impulses and such procedure is useful...

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Year 2002
Year 2015
Year 2017
Year 2020