Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Daisuke Shinagawa

Junichi Nakagawa

Osamu Goto

Yoshiyuki Shimokawa

Satoshi Kikko

Hideki Minami

Akira Morita

Hitoshi Yamao

Shota Ito

A transmission lineconfigured to be broken when it comes into contact with a railis installed on a disengagement prevention guideattached to an axle boxof a railway vehicle. One endand the other endof the transmission lineare connected to a determination unitto monitor continuity of the transmission line. In the event of a derailment, the determination unitdetermines that a derailment has occurred when the disengagement prevention guidemakes contact with the railand the transmission linebreaks, thereby interrupting the continuity of the transmission line. This arrangement allows an accurate detection of a derailment, so as to prevent a railway vehicle from traveling when its wheels have become disengaged from a rail without an operator being aware of it, thus improving safety after the derailment occurs.

Railway vehicle derailment detection method and device

An abnormality detection method for a vehicle body tilt control device makes it possible to determine which air spring has an air supply/exhaust abnormality. A model creation step prepares a state estimation model for each of the front and rear vehicle halves into which a vehicle is divided, and an abnormality detection step applies a state estimation technique to the state estimation model to detect which one of the air springs has an air supply/exhaust abnormality. When flow rate command values for air supplied to/exhausted from the air springs included in each vehicle half are input, each of the input flow rate command values for air supplied to/exhausted from the air springs is multiplied by a virtual gain and the results are averaged. Based on the averages, the average of the heights of the air springs is output, where each virtual gain is included as a state variable.

Abnormality detection method for vehicle body tilt control device

Control of vehicle body tilting when a railway vehicle travels along a curve includes: detecting a pressure of compressed air in an air tank; driving a compressor that supplies compressed air to the tank when detecting a pressure drop in the tank to or below a first threshold level Pin association with introduction of compressed air into air springs; and limiting the amount of compressed air to be introduced from the tank into the springs to a level equal to or lower than the amount of compressed air to be supplied from the compressor to the tank while continuing the introduction from the tank into the springs. This ensures that the tank pressure is maintained at a level equal to or higher than a minimum level required for braking actuation of the railway vehicle to have ride comfort when traveling along a curve and without causing braking trouble.

Method for control of vehicle body tilting of railway vehicle

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Tokyo, Japan

Daisuke Shinagawa