adhesion level for the proper running of rail wheelset on track is crucial problem in detecting slippage to avoid accidents. the slippage of rail wheels has been observed applying forward and lateral motions to slip velocity and torsion motion. the longitudinal and lateral forces behavior is watched with respect to traction force to note correlation based on angle of attack. the deriving torque...

The article analyzes the motion of a wheelset along path unequal length with shaft wear rails. authors have studied influence an external disturbing force on parametric system “wheel-rail”. considered problem is solved basis mathematical model interaction pair wheels and rail, taking into account additive effect stiffness rail vehicle. It shown that elasticity track in longitudinal direction al...

Purpose: The conduction of experimental studies in the conditions locomotive depot, transition to mathematical modeling wheel-motor block for diagnostics position, not allowing disassembly, traction electric motor bearings. Methods: Diagnostic complexes determine technical state depots. In order approaches choice and evaluation power source parameters vibroacoustic blocks depot analysis designi...

This paper proposes an active steering controller for Driven Independently Rotating Wheelset (DIRW) vehicles based on deep reinforcement learning (DRL). For the two-axle railway equipped with Wheelsets (IRWs), each wheel connected to a wheel-side motor, Ape-X DDPG controller, enhanced version of Deep Deterministic Policy Gradient (DDPG) algorithm, is adopted. Incorporating Distributed Prioritiz...

background and objective: obstructive sleep apnea (osa) is a disease with serious consequences. many portable devices have been developed to overwhelm some of limitations in the accessibility of the gold standard test for osa, polysomnography (psg). this study aimed to determine diagnostic accuracy of a portable sleep apnea screener against psg in patients of a sleep clinic. materials and metho...