Shinobu Yasukawa

Anti-slip control of electric motor coach based on disturbance observer

In electric motor coaches, when the adhesion force coefficient between rail and driving wheel decreases suddenly, the electric motor coach has a slip phenomena. This paper proposes a new estimation method of the adhesion force coefficient, which is based on disturbance observer. Moreover, the proposed adhesion force coefficient estimation system is applied to a new anti-slip control method in this paper. In the numerical simulation results in this paper, the proposed anti-slip control method well regulates the driving wheel torque of electric motor coach and keeps the utilization ratio of maximum adhesion force coefficient 100%.

Antislip Readhesion Control Based on Speed-Sensorless Vector Control and Disturbance Observer for Electric Commuter Train—Series 205-5000 of the East Japan Railway Company

The improvement of adhesion characteristics is important in electric commuter train. The electric commuter train has both a slip phenomenon and a slide phenomenon. Slip-and-slide phenomena degrade the comfortable riding performance of electric commuter train. We have already proposed an antislip/ antislide readhesion control system based on disturbance observer and sensorless vector control. The effectiveness of the proposed method has been confirmed by the experiment and the numerical simulation using the tested bogie system of electric commuter train. Then, we apply the proposed method to the actual electric commuter train of series 205-5000 of the East Japan Railway Company. In the experimental results of series 205-5000, this paper demonstrates that the proposed antislip/slide readhesion control system has the desired driving wheel torque response. Moreover, this paper discusses the evaluation method of readhesion control test results.

Re-adhesion control of electric motor coach based on disturbance observer and sensor-less vector control

When the adhesion force coefficient between rail and driving wheel decreases, the electric motor coach has slip phenomena. We have already proposed the anti-slip re-adhesion control system based on a disturbance observer. This system has the fine torque response for one driving wheel driven by one inverter-fed induction motor. However, the bogie of an electric motor coach has four driving wheels driven by two induction motors, which are driven by one inverter. In order to realize the anti-slip re-adhesion control system for the bogie of an electric motor coach, this paper proposes a new anti-slip re-adhesion control based on a disturbance observer and speed sensor-less vector control.

Anti-slip/skid Re-adhesion Control Based on Disturbance Observer Considering Bogie Vibration

This paper proposes a new anti-slip/skid re-adhesion control system for electric commuter train driven by inverter-fed induction motors. This paper designs an instantaneous tangential force estimator between driving wheel and rail, which is based on disturbance observer. The torque command of proposed system regulates to exceed this estimated tangential force in order to avoid undesirable slip phenomenon of driving wheels. For the actual bogie of electric commuter train, we have already proposed the anti-slip/skid re-adhesion control system based on the ordinary disturbance observer and the speed sensor-less vector control. This system has the fine torque response for slip condition. However, this system does not consider the vibration phenomenon of actual bogie dynamics of electric commuter train. In order to extend the anti-slip/skid re-adhesion control to the actual bogie system considering the vibration phenomenon, this paper proposes a new anti-slip/skid re-adhesion control based on a new high order disturbance observer considering the first resonant frequency. The numerical simulation results confirm the validity of the proposed control system.

Adhesion control of electric motor coach based on force control using disturbance observer

In electric motor coaches, when the adhesion force coefficient between rail and driving wheel decreases suddenly, the electric motor coach experiences slip phenomena. We (1999) have already proposed the anti-slip control system based on ordinary zero order disturbance observer, which has a good anti-slip response. In order to realize the more stable anti-slip re-adhesion control in the case of large variation of adhesion force coefficient, this paper proposes a new adhesion control based on the torque feedback control using the first order disturbance observer. In the numerical simulation results in this paper, the proposed anti-slip adhesion control well regulates the driving wheel torque of electric motor coach more stably and more robustly.

Anti-slip re-adhesion control based on speed sensor-less vector control and disturbance observer for electric multiple units, series 205-5000 of East Japan Railway Company

The improvement of adhesion characteristics is important in electric motor coach. We have already proposed the anti-slip/skid re-adhesion control system based on disturbance observer and sensor-less vector control. The effectiveness of the proposed method has been confirmed by the experiment and the numerical simulation using the tested bogie system of electric motor coach. In this paper, we apply the proposed method to the actual electric multiple units, which is Series 205-5000 of East Japan Railway Company. In the experimental results of Series 205-5000, this paper discusses that the proposed anti-slip/skid re-adhesion control system has the desired driving wheel torque response and the desired anti-slip control performance.

Anti-slip Readhesion Control of Electric Commuter Train Based on Disturbance Observer Considering Bogie Dynamics

This paper proposes a new anti-slip readhesion control system for electric railway vehicle driven by inverter-fed induction motors. This paper designs an instantaneous tangential force coefficient estimator between driving wheel and rail, which is based on disturbance observer. The torque command of proposed system regulates to exceed this estimated tangential force coefficient in order to avoid undesirable slip phenomenon of driving wheels. For the actual bogie of electric commuter train, we have already proposed the anti-slip readhesion control system based on the ordinary disturbance observer and the speed sensor-less vector control. This system has the fine torque response for slip condition. However, this system cannot consider the vibration phenomenon of actual bogie dynamics of electric commuter train. In order to extend the anti-slip readhesion control to the actual bogie system considering the vibration phenomenon, this paper proposes a new anti-slip readhesion control based on a new high order disturbance observer considering the first resonant frequency. The experimental results and the numerical simulation results confirm the validity of the proposed control system

Anti-Slip/Skid Re-Adhesion Control of Electric Motor Coach Based on Disturbance Observer and Sensor-Less Vector Control

Abstract When the adhesion coefficient between rail and driving wheel decreases, the electric motor coach has slip phenomena. We have already proposed the anti-slip re-adhesion control system based on disturbance observer. This system has the fine torque response for one driving wheel driven by one inverter-fed induction motor. However, the bogie of electric motor coach has four driving wheels driven two induction motors. These induction motors connected in parallel are often driven by one inverter. In order to realize the anti-slip and anti-skid re-adhesion control system for the bogie of electric motor coach, this paper proposes a new re-adhesion control method based on disturbance observer and speed sensor-less vector control.

Anti-skid re-adhesion control based on disturbance observer considering air brake for electric commuter train

This paper proposes a new anti-skid re-adhesion control based on disturbance observer considering the air brake for electric commuter train. We have already proposed the anti-skid re-adhesion control with regenerative braking system based on disturbance observer. This proposed method has been the re-adhesion control using only regenerative braking mode. However, actual train uses both electric brake and air brake in the high-speed range. Hence, this paper proposes a new anti-skid re-adhesion control considering the air brake, which carries out the cooperation control of electric brake and air brake in order to realize a fine re-adhesion control. The numerical simulation results point out that the proposed system has the desired driving wheel torque response and a fine anti-skid re-adhesion control.

Cooperative control of regenerative brake and mechanical brake for a two coach train

Trains require high deceleration and stable traveling performance. The improvement of adhesion characteristics is, thus, very important for electric trains. Previously, we have proposed an anti-slip/skid re-adhesion control system based on a disturbance observer, with a high adhesion force utilization ratio. In the present work, we focus on the deceleration mode. Generally, a train has an electric regenerative brake (electric brake) and a mechanical brake (air brake). Under wet railway track conditions, the regenerative brake may fall into abeyance caused by the mechanical brake response. This paper considers a blended braking control and proposes a regenerative brake priority control. This paper evaluates and discusses regenerative brake priority control using numerical simulations.