Train control having improved wheel wear adjustment for more accurate train operation

DETAILED DESCRIPTION An improved control system is provided for a steel wheel vehicle having at least two propulsion/braking units with each unit operative with at least one axle.
The system comprises a propulsion/braking control that generates current signals to operate the axle motor drives and generates braking signals to operate the associated braking system in accordance with command signals.
A spin/slide control adjusts the propulsion/braking control in accordance with differential axle speeds to avoid vehicular spins/slides.
Means are provided for generating a signal representative of the speed of each axle and for generating a signal representative of an entered actual wheel size for a preselected axle.
Speed adjust factors are computed for the respective axles from the entered actual wheel size, the base wheel sizes and the axle speeds.
Means are provided for adjusting the respective axle speeds in accordance with the speed adjust factors and for applying the adjusted axle speeds to the spin/slide control for computation of differential axle speeds with wheel wear compensation.
Tractive effort adjust factors are computed for the respective propulsion/braking units from the actual wheel size, the base wheel sizes and the axle speeds.
Means are provided for applying the tractive effort adjustment factors to the propulsion/braking control for computation of tractive effort with wheel wear compensation.