This paper presents the development of control strategy for the active steering of railway vehicles with independently rotating wheelsets. The primary objective of the active steering is to stabilize the wheelset and to provide a guidance control. Some fundamental problems for active steering are addressed in the study. The developed controller is able to maintain stability and good performance...

Railway wheelsets are the key to ensuring safe operation of trains. To achieve zero-defect production, railway equipment manufacturers must strictly control every link in wheelset production process. The press-fit curve output by assembly machine is an essential indicator wheelset’s quality. operators will still need manually and individually recheck curves our practical case. However, there ma...

Conicity is an important characteristic that helps the railway vehicle to steer itself down track. However during operation, conicity tends change inconsistently due frictional contact at wheel-rail interface. Safety, reliability and ride comfort which are utmost importance for journey adversely affected changes in level beyond certain limit. Several techniques have been employed monitoring hea...

Stability is a key factor for the operation safety of railway vehicles, while current work employs linearized and simplified wheel/rail contact to study bifurcation mechanism assess stability. To stability characters under real nonlinear contact, fully parameterized vehicle wheelset model built. In modeling, geometry nonlinearities wheel rail profiles come from field measurements, including rol...

Apart from regular wheel wear such as decreasing wheel diameters and reduced flange thicknesses and heights, wheel flats (WF) and oval wheels (or OOR, Out-Of-Roundness) are the most common wheelset problems for railway vehicles. Within the FP7 Research Project “Saferail”, APT has developed an innovative wheelset monitoring system so-called “Wheel flat and Out of Roundness Monitoring (WORM) syst...