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The Identification of Selected Imperfections of Electric Traction Motors

100%
Skowron J., Sowa A.
Logistics and Transport
|
2013
|
vol. 19
7-14
EN
Electric traction motors of rail vehicles operate in very harsh conditions. This is due to their varying load and power fluctuations, as well as their exposure to high humidity, excessive shocks, dust and changing ambient temperature. These conditions can lead to the non-operational state of motors in operation which should be identified as soon as possible. This requires building the mathematical model of a traction drive system, which enables the full simulation of its work in real time. It also requires interference in the construction of the electrical system that allows for measuring the values of the relevant diagnostic features. The measurements of these features and their comparison to the values obtained from the mathematical model with the use of a multi-valued evaluation constitute the basis for the formulation of the operational diagnoses of traction motors.
2
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Zastosowanie wielowymiarowej analizy porównawczej do pomiaru dokonań jednostek gospodarczych

84%
Nowak E.
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu
|
2019
|
issue 544
191-200
PL
Artykuł jest poświęcony wykorzystaniu metod wielowymiarowej analizy porównawczej do pomiaru dokonań jednostek gospodarczych. Dokonania są złożoną kategorią ekonomiczną i obejmują wielkości o różnym charakterze, co rodzi określone problemy związane z ich pomiarem, zwłaszcza na potrzeby kompleksowej oceny dokonań. Tradycyjne mierniki dokonań odnoszą się bowiem do szczegółowych dokonań i nie mają charakteru syntetycznego. Jednym ze sposobów wyeliminowania tego niedostatku jest wielowymiarowa analiza porównawcza, której metody umożliwiają skonstruowanie mierników syntetycznych na podstawie zestawu mierników cząstkowych. Ważne jest, że mierniki cząstkowe mogą być wyrażone w odmiennych jednostkach miary. Ich agregację umożliwiają metody wielowymiarowej analizy porównawczej, ukierunkowane na pomiar złożonych zjawisk ekonomicznych, a takimi są dokonania.
EN
The paper addresses the use of multidimensional comparative analysis methods for measuring the performance of companies. Company performance is a complex economic category comprising a broad set of widely dissimilar values, which adds to the complexity of performance measurement tasks, particularly those produced for the purpose of comprehensive performance evaluations, since the traditional performance measurement instruments relate to specific feats and clearly lack a synthetic perspective. One of the ways to eliminate this shortcoming is the use of multidimensional comparative analysis. This type of analytical evaluation offers methods that can be used in the design of synthetic measures based on sets of partial metrics. It is worth noting that the partial metrics employed may be expressed in dissimilar units of measurement, as the multidimensional comparative analysis methods are designed to address exactly this type of problems in the measurement of complex phenomena such as company performance.
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