A type of parameter estimation technique based on the linear integral filter (LIF) method, the least-absolute error with variable forgetting factor (LAE+VFF) estimation method, is proposed in this paper to estimate the railway wheelset parameters modelled as a time-varying continuous-time (C-T) system. The inputs to the parameter estimator are the control signal and the railway wheelset system ...

The UIC Standard Suspension consists of a leaf spring (5) see the figure which rests on the axle box (6), which can move horizontally and vertically between the guidances (4). In the horizontal the guidance provides an end stop for the translations and the yaw of the wheelset (7). In the vertical direction the motion of the wheelset is restricted by the leaf spring with its nonlinear dry fricti...

Lateral velocity has very backbone position in the railway vehicle wheelset dynamics as it usually becomes cause of derailment by sliding due to insufficient adhesion ratio. This impropriate balance is pretext owing to contamination and weather procures the disturbances. This perturbation makes hindrances in proper running of wheelset on track. To analyze the noise, Kalman filter is used based ...

By analyzing the measured corrugation data, cause of rail was discussed theoretically. Then, vehicle-track coupling model used to study stick-slip characteristics wheel-rail system. Finally, explained by combining modal analysis and relation. The transverse curve on inner rail-inner wheel leading wheelset presents a negative slope characteristic, which makes easy slide surface aggravates wear r...

in this paper effects of fractured sleepers on rail track vibration under moving wheelset have been investigated. two parallel rails of the track have been modeled as euler-bernoulli beams on elastic points as rail pads. also sleepers have been modeled as visco-elastic euler-bernoulli beams. it is assumed that, some sleepers under the rail track have been fractured and modeled by two beams. the...

The design of European two–axle freight wagons can be traced back to the 1890’es. It has been and still is widely used in Europe because it is simple, rugged and cheap in price and maintenance. The internationally approved suspension for two–axle freight wagons in Europe is known as the UIC standard suspension (see Fig. 1). Each wagon has four of these suspensions. They consist of a leaf spring...

In the UK, the use of similar vehicle types by a range of privatised operators gives the opportunity to assess the influence of different route conditions and maintenance practices on wheel tread damage, wheelset life and costs. This paper investigates these influences, using data obtained directly from the train operators and maintainers. By disseminating best practice it is expected that whee...

This article presents a numerical simulation that aims to examine the effect, of randomness in forward speed, in lateral clearance (dead band) and in both, on the dynamic behaviors of singleand two-axle railway wheelsets. Randomness is represented by pseudo-random numbers. They are incorporated into the dynamic models of the wheelsets. Subsequently, the temporal average of Lyapunov exponents is...

Maintenance of Railway rolling stock is usually scheduled based. However, the mechanical parts, especially wheelset may wear down prematurely due to several factors such as excessive braking and traction forces environmental conditions. This makes maintenance less effective sometimes it results in derailments. paper presents a deep learning-based technique detect wheel conditions so that can be...

Acoustic emission (AE) can be employed for the early fault detection of rolling stock wheelset components. Research has been carried out on development a remote condition monitoring (RCM) technology online defects. Railway axle bearings and wheels are critical components that develop faults at any time when in service. AE is reliable passive RCM technique quantitative evaluation structural inte...