No abstract

No abstract

No abstract

Electric trains require high deceleration capability and stable traveling performance. This paper focuses on electric train deceleration under wet railway track conditions. Electric trains typically have electric brakes and air brakes. Under low-adhesion-coefficient conditions, each axle experiences skidding. The driving wheel may then become locked because of the air brake. This causes damage to the wheel tread that can result in what is called a "wheel flat". Many studies have focused on overcoming this problem. This paper proposes an anti-lock control system for electric train driving wheels using driving wheel speed and acceleration. This anti-lock driving wheel control system is evaluated in this study using numerical simulation.

Trains require high deceleration and stable traveling performance. Improvement in adhesion characteristics is, thus, very important for electric trains. We have previously proposed an anti-slip/skid re-adhesion control system that is based on a disturbance observer and possesses 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 an air brake (mechanical brake). Under wet railway track conditions, the regenerative brake may be suspended because of the air brake response. This paper proposes a regenerative brake priority control and an electro-pneumatic blended braking control based on an estimated adhesion coefficient. Furthermore, this paper evaluates and discusses regenerative brake priority control using numerical simulations.