Compensation of excessive angular momentum in a re-adhesion control of an electric train

A smart dynamic control for suppressing slip between rails and wheels is a key technology for a good traction performance in electric railways. An appropriate choice of the timing of increasing traction torque after a temporary torque reduction to mitigate slip is significant for a successful dynamic adhesion control. We propose to monitor excessive angular moment of a wheel to decide the timing of re-enhancement of the wheel torque. Numerical and experimental results verify advantage of the proposed control scheme.