Title: Algorithm for inverse determination of derailment coefficient by using instrumented wheelsets

Authors: Milan Bižić; Dragan Petrović

Addresses: Faculty of Mechanical and Civil Engineering in Kraljevo, University of Kragujevac, Dositejeva 19, 36000 Kraljevo, Serbia ' Faculty of Mechanical and Civil Engineering in Kraljevo, University of Kragujevac, Dositejeva 19, 36000 Kraljevo, Serbia

Abstract: The main indicator of the running safety of railway vehicles is the ratio between lateral and vertical forces in the wheel-rail interaction, known as derailment coefficient. Its exact determination has a huge significance in the development and certification phases of railway vehicles. The most reliable determination of wheel-rail interaction forces is based on experimental testing, by using instrumented wheelsets, which is otherwise prescribed in appropriate international regulations. This paper presents a unique algorithm for inverse determination of wheel-rail interaction forces, i.e., derailment coefficient, based on the measurement signals obtained from instrumented wheelsets. The blind signal separation (BSS) and method of independent component analysis (ICA) are applied. Verification is carried out on the example of the wheelset of freight wagon, based on the wheel's FEM model. The obtained results confirmed a high efficiency and accuracy of the developed algorithm, whereby estimated error of inverse identification is less than 5%.

Keywords: inverse determination; wheel-rail interaction forces; derailment coefficient; experimental testing; running safety; railway vehicles; instrumented wheelset.

DOI: 10.1504/IJHVS.2022.128915

International Journal of Heavy Vehicle Systems, 2022 Vol.29 No.5, pp.503 - 517

Received: 25 May 2021
Accepted: 26 May 2021
Published online: 10 Feb 2023 *

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