Novel Maximum Adhesive Force Control Without Vehicle Speed Sensor

Maximum adhesive force control has been developed to restrict the adhesive force to its maximum value by utilizing the adhesive coefficient between the wheel and rail, which peaks at a specific slip ratio when the drive wheel slips. To estimate the slip speed at the peak adhesive force value, the vehicle and wheel speeds are required. In this study, maximum adhesive force control was proposed, which involves estimating the vehicle speed using the LPF of the driving-wheel speed instead of the vehicle speed. Simulation results indicate that the torque was successfully controlled to drive at the maximum adhesive force. In addition, the proposed control method was validated using a wheel-rail test bench.