Abstract: A brake control system includes a target braking force calculator to calculate a target braking force for causing a vehicle to decelerate in accordance with a braking instruction containing a normal braking instruction or emergency braking instruction, and a target pressure calculator to calculate a target pressure, indicating a target value of pressure of fluid to be fed to a mechanical brake device for activating the mechanical brake device, based on the target braking force. The brake control system further includes a compensation controller to execute control for compensating for the gap between the actual braking force and the target braking force when the braking instruction contains an emergency braking instruction, and an outputter to compress fluid fed from a fluid source in accordance with the target pressure and feed the compressed fluid to the mechanical brake device.

Abstract: A failure determination device determines whether any failure occurs in a rotating body including a shaft rotatable by received power and a support mechanism supporting the shaft rotatably. In detail, the failure determination device includes a rate generator, a frequency calculator, and a determiner. The rate generator outputs a sensor signal of which a frequency varies depending on a rotational speed of the shaft. The frequency calculator calculates a frequency of the sensor signal. The determiner determines whether any failure occurs in the rotating body from the frequency calculated by the frequency calculator.

Abstract: A failure determination device includes an acquirer to acquire pressure values of air springs provided to bogies included in a vehicle to support a vehicle body included in the vehicle, a compensator to perform compensation of the pressure values of the air springs depending on the position of the vehicle, and a determiner to determine, based on the pressure values of the air springs compensated by the compensator, whether any failure occurs in the air springs.

Abstract: A brake control system to be installed on a railroad car, the system including: a brake command unit that outputs a first brake command by a first communication method and outputs a second brake command by a second communication method, the first brake command indicating details of control of a brake, the second brake command restricting details of control of the brake; and a brake control unit that acquires the first brake command by the first communication method via a train control and monitoring system, acquires the second brake command by the second communication method, and controls the brake based on the first brake command and the second brake command.

Abstract: In a memory diagnostic method, a fixed domain stores data that are not changed during process execution. A variable domain stores data that are subject to writing during process execution. A fixed domain diagnostic part adds an error-detecting code to data to be stored in the fixed domain. The fixed domain diagnostic part compares an error-detecting code calculated from data read from the fixed domain with the added error-detecting code to determine whether there is any data error. A variable domain diagnostic part temporarily stores data stored in the variable domain in a memory region different from the memory storing the data, and writes known data in the variable domain where the temporarily stored data were stored. The variable domain diagnostic part reads data from the region where the known data were written and determines whether the data is the same as the written known data.

Abstract: A brake pressure computing apparatus acquires a target cylinder pressure which is a target value of the pressure inside the brake cylinder of an air brake, and is equipped with a target cylinder pressure acquirer, a deceleration differential information acquirer, and a target cylinder pressure correction value acquirer. The target cylinder pressure acquirer acquires a target cylinder pressure on the basis of a required braking force and a target cylinder pressure correction value. The deceleration differential information acquirer acquires deceleration differential information indicating the difference between the target value of the deceleration and the actual value of the deceleration. The target cylinder pressure correction value acquirer acquires the target cylinder pressure correction value on the basis of the deceleration differential information.

Abstract: To provide a train braking device including a controller that controls a brake cylinder pressure acting on a brake cylinder based on a service brake command or an emergency brake command, the train braking device includes a supply valve for supplying compressed air to the brake cylinder and an exhaust valve for adjusting a pressure of the supplied compressed air.

Abstract: A brake pressure computing apparatus acquires a target cylinder pressure which is a target value of the pressure inside the brake cylinder of an air brake, and is equipped with a target cylinder pressure acquirer, a deceleration differential information acquirer, and a target cylinder pressure correction value acquirer. The target cylinder pressure acquirer acquires a target cylinder pressure on the basis of a required braking force and a target cylinder pressure correction value. The deceleration differential information acquirer acquires deceleration differential information indicating the difference between the target value of the deceleration and the actual value of the deceleration. The target cylinder pressure correction value acquirer acquires the target cylinder pressure correction value on the basis of the deceleration differential information.

Abstract: A train slide control device and a train slide control method capable of further improving the precision of slide control are achieved. The train slide control device comprises: an electromagnetic valve unit; a relay valve that outputs a pressure of the brake cylinder; and a slide controller that includes: a velocity-difference detecting unit that detects a velocity difference of each wheel based on a velocity signal; a deceleration calculating unit that calculates a deceleration of a train based on the velocity signal; a sliding-amount determining unit that determines a sliding-amount of each wheel based on the velocity difference and deceleration; and a brake-cylinder-pressure calculating unit that calculates a pressure control signal for controlling a pressure of the brake cylinder based on: the sliding-amount; a brake command for obtaining a predetermined deceleration; and a signal that indicates the pressure of the compressed air and a pressure of the brake cylinder.

Abstract: In a memory diagnostic method, a fixed domain stores data that are not changed during process execution. A variable domain stores data that are subject to writing during process execution. A fixed domain diagnostic part adds an error-detecting code to data to be stored in the fixed domain. The fixed domain diagnostic part compares an error-detecting code calculated from data read from the fixed domain with the added error-detecting code to determine whether there is any data error. A variable domain diagnostic part temporarily stores data stored in the variable domain in a memory region different from the memory storing the data, and writes known data in the variable domain where the temporarily stored data were stored. The variable domain diagnostic part reads data from the region where the known data were written and determines whether the data is the same as the written known data.

Abstract: The operation frequency of electromagnetic valves is reduced in an air brake device of a train containing a motor car. A necessary brake force acquisition unit acquires the necessary brake force necessary for each car or flatcar of a train containing a motor car. An electric brake force detection unit detects an electric brake force of the entire composition of the train. A brake force adjustment unit distributes the air brake force so that fluctuations in the electric brake force are compensated for by the air brake force of one car or flatcar, in an operating period of one deceleration of the train or from running to stopping. A brake force command unit sends a command to an air brake control device for the value distributed by the brake force adjustment unit. The air brake control device controls the air brake of the car in accordance with the value commanded.

Abstract: A rail vehicle brake control device includes a brake control unit that is mounted on each truck and generates a pressure control signal for controlling a brake cylinder pressure that acts on a brake cylinder based on a service brake command and an emergency brake command, an electromagnetic valve unit that includes a brake control valve that adjusts a pressure of compressed air supplied to the brake cylinder according to the pressure control signal, and a relay valve that outputs the brake cylinder pressure corresponding to the compressed air supplied from the electromagnetic valve unit. The electromagnetic valve unit includes a release isolation magnet valve that adjusts a pressure of the compressed air supplied to a primary side of the relay valve, and the release isolation magnet valve is operated by receiving power source supply from a brake control device mounted on another truck.

Abstract: To provide a train braking device including a controller that controls a brake cylinder pressure acting on a brake cylinder based on a service brake command or an emergency brake command, the train braking device includes a supply valve for supplying compressed air to the brake cylinder and an exhaust valve for adjusting a pressure of the supplied compressed air.

Abstract: A train slide control device and a train slide control method capable of further improving the precision of slide control are achieved. The train slide control device comprises: an electromagnetic valve unit; a relay valve that outputs a pressure of the brake cylinder; and a slide controller that includes: a velocity-difference detecting unit that detects a velocity difference of each wheel based on a velocity signal; a deceleration calculating unit that calculates a deceleration of a train based on the velocity signal; a sliding-amount determining unit that determines a sliding-amount of each wheel based on the velocity difference and deceleration; and a brake-cylinder-pressure calculating unit that calculates a pressure control signal for controlling a pressure of the brake cylinder based on: the sliding-amount; a brake command for obtaining a predetermined deceleration; and a signal that indicates the pressure of the compressed air and a pressure of the brake cylinder.