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Wyszukujesz frazę "uncertainty analysis" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Metrological Analysis of Precision of the System of Delivering a Water Capsule for Explosive Production of Water Aerosol
    Autorzy:
    Śmigielski, G.
    Toczek, W.
    Dygdała, R.
    Stefański, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/221553.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    water capsule airdrop control system
    uncertainty analysis
    GUM uncertainty framework
    propagation of distributions
    Opis:
    In this paper precision of the system controlling delivery by a helicopter of a water capsule designed for extinguishing large scale fires is analysed. The analysis was performed using a numerical method of distribution propagation (the Monte Carlo method) supplemented with results of application of the uncertainty propagation method. In addition, the optimum conditions for the airdrop are determined to ensure achieving the maximum area covered by the water capsule with simultaneous preserving the precision level necessary for efficient fire extinguishing.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 1; 47-58
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Automatic defect detection and characterization by thermographic images based on damage classifiers evaluation
    Autorzy:
    Dinardo, Giuseppe
    Fabbiano, Laura
    Tamborrino, Rosanna
    Vacca, Gaetano
    Powiązania:
    https://bibliotekanauki.pl/articles/221850.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermography
    non-destructive testing
    thermal barrier coatings
    image segmentation
    uncertainty analysis
    Opis:
    In the framework of non-destructive evaluation (NDE), an accurate and precise characterization of defects is fundamental. This paper proposes a novel method for characterization of partial detachment of thermal barrier coatings from metallic surfaces, using the long pulsed thermography (LPT). There exist many applications, in which the LPT technique provides clear and intelligible thermograms. The introduced method comprises a series of post-processing operations of the thermal images. The purpose is to improve the linear fit of the cooling stage of the surface under investigation in the logarithmic scale. To this end, additional fit parameters are introduced. Such parameters, defined as damage classifiers, are represented as image maps, allowing for a straightforward localization of the defects. The defect size information provided by each classifier is, then, obtained by means of an automatic segmentation of the images. The main advantages of the proposed technique are the automaticity (due to the image segmentation procedures) and relatively limited uncertainties in the estimation of the defect size.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 2; 219-242
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Point-plane distance AS model for uncertainty evaluation of coordinate measurement
    Autorzy:
    Płowucha, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/1849154.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    task specific uncertainty
    uncertainty of coordinate measurement
    measurement models
    Type B evaluation
    sensitivity analysis method
    Opis:
    The paper presents a detailed theoretical background for coordinate measurement uncertainty evaluation by means of Type B evaluation method, taking into account information on accuracy of a coordinate measuring system given with the formula for maximum permissible errors of length measurement and verification test results. A proposal for evaluation of the verification test results is made. A measurement model based on the point-plane distance equation is presented. A detailed analysis of the partial derivatives (sensitivity factors in an uncertainty budget) of the measurement model is presented. The analyses of measurement uncertainty for different geometrical characteristics were conducted using this measurement model. Examples of uncertainty evaluation for geometrical deviations are presented: position of a point related to a datum plane and flatness in the case of convex or concave surfaces. The examples include detailed uncertainty budgets.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 4; 625-639
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Analysis Of Tensile Test Results to Assess the Innovation Risk for an Additive Manufacturing Technology
    Autorzy:
    Adamczak, S.
    Bochnia, J.
    Kaczmarska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/221812.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    failure mode and effects analysis
    static tensile test
    measurement uncertainty
    Opis:
    The aim of this study was to assess the innovation risk for an additive manufacturing process. The analysis was based on the results of static tensile tests obtained for specimens made of photocured resin. The assessment involved analyzing the measurement uncertainty by applying the FMEA method. The structure of the causes and effects of the discrepancies was illustrated using the Ishikawa diagram. The risk priority numbers were calculated. The uncertainty of the tensile test measurement was determined for three printing orientations. The results suggest that the material used to fabricate the tensile specimens shows clear anisotropy of the properties in relation to the printing direction.
    Źródło:
    Metrology and Measurement Systems; 2015, 22, 1; 127-138
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uncertainty analysis of measuring system for instantaneous power research
    Autorzy:
    Dzwonkowski, A.
    Swędrowski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/221896.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    measuring system
    metrological analysis
    power measurements
    measurement uncertainty
    induction motor diagnostics
    Opis:
    The electrical power drawn by an induction motor is distorted in case of appearance of a certain type of failures. Under spectral analysis of the instantaneous power one obtains the components which are connected with definite types of damage. An analysis of the amplitudes and frequencies of the components allows to recognize the type of fault. The paper presents a metrological analysis of the measurement system used for diagnosis of induction motor bearings, based on the analysis of the instantaneous power. This system was implemented as a set of devices with dedicated software installed on a PC. A number of measurements for uncertainty estimation was carried out. The results of the measurements are presented in the paper. The results of the aforementioned analysis helped to determine the measurement uncertainty which can be expected during bearing diagnostic measurements, by the method relying on measurement and analysis of the instantaneous power of an induction machine.
    Źródło:
    Metrology and Measurement Systems; 2012, 19, 3; 573-582
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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