Abstract The results of experimental studies the rolling stock traction electric motors collector profile are presented. A technique is shown for combining collector’s profilograms in cold and hot state non-synchronized values origin. new diagnostic parameter proposed assessing - root-mean-square value difference relative heights plates states. changes comparison after repair a locomotive depot...

In the article results of research work mine electric locomotive are driven on condition stability system "A wheel is a rail" coupling wheels with rails. It marked that transport conditioned by row specific terms. indicated for realization electromechanics systems locomotives structures used hauling engines direct and variable current. During working as an important question there Investigation...

Rail corrugation is usually generated in modern railway transportations, such as high-speed railway, urban and heavy-haul railway. It one of the major excitations to wheel–rail dynamic interaction, which will cause extra vibration noise, failures, or even risk derailment vehicle its components. A dynamics model a locomotive considering traction power from electric motor wheelset through gear tr...

In a large railway passenger traffic network, a given set of trips or service blocks are to be serviced by equipment consisting of several groups of locomotives/carriages. The allowed groups per service block are predefined as patterns or multisets of locomotives and carriages. A given type of locomotive/carriage may occur with varying numbers in several groups. We search for a cost-minimal ass...

Traditional online wheel-set ultrasonic inspection method and inspection technology can not meet the new requirement of High Power Locomotive wheel-set online. In this article, features of locomotive wheel and defect distribution are analyzed, and a more strictly online inspection requirement is put forward. Based on which, an optimized multi arrangement of phased array and conventional ultraso...

The article discusses the solution to problem of underground railway transport slipping in dynamic modes, which occurs when there is a significant difference speeds driving and driven pairs wheels. state rail surfaces largely determines coefficient adhesion, therefore, using mathematical model, condition for dependence magnitude tractive effort selected. For effective acceleration deceleration ...

The aims of our study were to examine whether a gravity-removal physical activity classification algorithm (GRPACA) is applicable for discrimination between nonlocomotive and locomotive activities for various physical activities (PAs) of children and to prove that this approach improves the estimation accuracy of a prediction model for children using an accelerometer. Japanese children (42 boys...