Doppler Radar

Doppler Radar based Adhesion Control System is developed for improving the realizable adhesion in WAG9 & WAG9H class locomotives during wheel slip conditions which occurs due to bad weather and poor track conditions. Using a Doppler Radar, the ground speed is detected, which is compared with each axle speed. The slipping bogie is identified precisely and instantaneous tractive effort correction is applied to bring the condition to non-slipping state. After slip is controlled, the tractive effort is restored back to the original value or to a safe level where re-adhesion is achieved.