The Modern Wheelset Drive System and Possibilities of Modelling the Torsion Dynamics

Abstract

The article deals with the view of modern wheelset drive construction design in the first part. Next part deals with dynamics of the wheelset individual drive torsion system in electric traction vehicles, explained by the drive model in several variants. The basics of time simulation of the transition dynamics effects have been explained and the frequency analysis of the system has been shown. Identification of transition dynamics effects in the wheelset drive enables to evaluate precisely the loading on individual parts during the design stage, to apply the results in anti-skid protection and probably also to disclose some effects due to wear in the wheel-rail contact.

Friction coefficient estimation using an unscented Kalman filter

“…• v k =[1e-2,1e-2,1e-2,1e-2,1e-2,1e-2,1e-2] where the state matrix A and measurement matrix H are determined by system dynamic equations (3-1) to (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16). As the dynamic equations are nonlinear, both A and H are worked out using numerical methods.…”

“…As this research project is focused on the traction behaviour, each of the wheelsets is powered by an AC induction motor through a pair of spur gears, as shown in Figure 1. The traction motor adopts the axle-hung arrangement [9], connected to the wheel axle by two bearing blocks. The anti-pitch arm is designed to reduce the pitch movement of the motor against the wheelset frame.…”

Investigation Into the Mechanical Properties and Metal Creaks of a Diesel Locomotive Wheel

“…the unevenness of rails or non-uniformly worn-out wheel-set rolling surfaces as well as different rolling radii of one of the wheel-set tyres, variation in track curve radius, dirty or wet rails, interaction of wagons etc. (Bureika 2008;Bureika and Mikaliūnas 2008;Dailydka et al 2008;Lata 2008;Liudvinavičius et al 2009;Lata and Čáp 2010;Djukić et al 2010;Liudvinavičius and Lingaitis 2007;Dukkipati et al 1992;Fang et al 1991). A reliable, safe freight and passenger transportation process is defined by a properly selected mode of rolling stock use, an efficient application of maintenance and repair systems, exact discipline at work and discipline procedures.…”

A Fuzzy Model for an Increase in Locomotive Traction Force

“…A minimum level of adhesion is required for a good traction and braking performance of rail vehicles (Arias-Cuevas and Li 2008;Lata 2008). Increasing traction force represents an extremely complicated problem because of the complexity of wheel-rail adhesion nature, i.e.…”