Development of anti-slip re-adhesion control based on estimated tangential force feedback for safe and comfortable next generation electric commuter train

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Generally, the tangential force is defined by the function of both the weights of electric train and the adhesion force coefficient between rail and driving wheel. The adhesion force coefficient is strongly affected by the conditions between rails and driving wheels, such as moisture, dust, oil on the rails and so on. When the adhesion force coefficient between rail and driving wheel decreases, the electric train has a slip phenomenon. A slip phenomenon is uncomfortable for the passengers of electric train, and consumes both the rails and the driving wheels. Therefore, the drive system of electric train is requested to have a fine anti-slip and anti-skid re-adhesion control system. In order to overcome this problem, an and-slip control method has been proposed. We have already proposed an and-slip re-adhesion control system based on disturbance observer. Recently, the re-adhesion control system is constituted with sensor-less vector control in order to improve the extreme low-resolutio … More n rotary encoder. This proposed method has been confirmed by the numerical simulation and the experimental simulation using the tested bogie system of electric commuter train. Since 2002, we started to apply to the actual electric commuter train, which is Series 205-5000 of East Japan Railway Company. Generally, actual electric commuter train uses both electric brake and air brake in the high-speed range over about 50[km/h]. In order to realize a fine re-adhesion control, this report proposes a new anti-skid re-adhesion control considering the air brake, which carries out the cooperation control of electric brake and air brake.Moreover, in order to suppress slip phenomenon, we have already proposed anti-slip re-adhesion control system based on disturbance observer, and we have confirmed that this system drives the train with high adhesion force utilization ratio. However, this system does not consider the vibration phenomenon of actual bogie dynamics of electric commuter train, tangential force estimation is affected by bogie vibration. Hence, the drive control system cannot determine the appropriate motor torque reference, and sometimes reduces the adhesion force utilization ratio. This report proposes a new anti-slip re-adhesion control system based on the disturbance observer considering the first resonant frequency of bogie system. Less