Condition monitoring for the management of running safety in commercial line

In general, the safety against derailment is evaluated by derailment coefficient that is defined by Lateral force (L)/ Vertical force (V). Conventionally these forces are measured by special wheelset called LV wheelset only at the timing to secure the safety of newly produced vehicle or newly constructed tracks. On the other hand the authors developed remote monitoring system of measuring these forces from track side or vehicle in commercial line. The authors also developed the system of controlling friction between wheel and rail which affects deeply the performance of vehicle dynamics. In this paper the state of controlled wheel/rail friction monitored by this new system is reported and the idea of Condition Based Maintenance of wheel/rail friction is also proposed.