Anti-Slip Control of Mechanical Brake Systems forRailway Rolling Stock

摘要

The slip of railway rolling stocks is occurred by the relative velocity between train and rail and affects an adhesion force. During slipping, the coefficient of the adhesion force changes in accordance with the slip and the condition of the rail road. In general, the value of the coefficient ofthe adhesion force increases upon the maximum value during the slip is rising, and then, it declines while the slip keeps going on. In addition, the value of the dry condition is larger than that of the wet condition on the rail surface. Through the relation between the adhesion force and the slip ratio, itcan be found that the peak point of the adhesion force represents the maximum brake performance. However, the coefficient of the adhesion force is a time-varying parameter and hard to analyze. Therefore, a robust anti-slip brake control system which can use the maximum adhesion force is proposed. In order to find the condition of the maximum adhesion force, the reference slip generator is used with disturbance observer. The performance of the designed control system is evaluated by computer simulation.