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The use of a fuzzy expert system to increase the reliability of diagnostics of axle boxes of rolling stocks

Manafov Elshan

Zeszyty Naukowe. Transport / Politechnika Śląska

2020

z. 107

95--106

This paper is devoted to the development of an effective system for monitoring the technical condition of the axle boxes of rolling stock. To this end, the possibility of solving problems of fault diagnostics based on the theory of fuzzy sets is considered. This allows one note such difficult-to-formalise factors as experience and intuition of a highly qualified expert specialist. It showed that an expert system-based monitoring approach allows evaluation of the technical condition of the axle boxes, characterised by internal and external operating uncertainty. It also proposed the use of parameters such as vibration and noise for comprehensive monitoring of the technical condition of axle box units together with temperature. Furthermore, the combination of these diagnostic parameters and expert system’s possibility to receive all necessary information about the condition of the most critical components of the axle boxes in real-time and analyse the changes in their operational parameters was explored. The stages of modelling an expert system in the Fuzzy Logic Toolbox package of the MATLAB computing environment are presented.

New edition of European regulations concerning axle boxes, rolling bearings and greases in the aspect of operational safety : greases for rolling bearings

Sobaś M.

Pojazdy Szynowe

2018

Nr 4

14--26

The article presents the currently valid regulations concerning axle boxes, bearings and greases for running gear systems of rail vehicles in the aspect of operational safety, running in the domestic and cross-border traffic. The article deals with the significant problems regarding the approval process of individual components, i.e. bearing greases, bearings and axle boxes. The new European standards are an important guarantor of the comprehensive safety of wheelsets and running gear systems of railway vehicles. This article deals with rolling bearings greases used in the country.

W artykule przedstawiono aktualnie obowiązujące przepisy dotyczące maźnic, łożysk oraz smarów dla układów biegowych pojazdów szynowych w aspekcie bezpieczeństwa eksploatacyjnego, kursującym w ruchu krajowym oraz transgranicznym. Artykuł porusza istotne problemy dotyczące procesu homologacji poszczególnych elementów tzn. smarów łożyskowych, łożysk oraz maźnic. Nowe normy europejskie są istotnym gwarantem kompleksowego bezpieczeństwa zestawów kołowych oraz układów biegowych pojazdów szynowych. W tym artykule zajęto się smarami do łożysk tocznych, używanymi w kraju.