Active steering control device and method for railroad vehicle

Abstract

The present invention relates to an active steering control device and method for a railroad vehicle, and more specifically, to an active steering control device and method for a railroad vehicle, which can smoothly steer a moving railroad vehicle by estimating the radius of curvature of a curved line in real-time when the train moves on the curved line and controlling an optimal steering angle of the wheel and axle according to the estimated radius of curvature, and can remarkably reduce an angle of attack which exists between the curved line and the wheel and axle. The invention includes: a measurer that measures drive data of the moving railroad vehicle; an estimator that estimates the radius of curvature of the curved line on which the railroad vehicle is moving, by using the data measured in the measuring unit; a calculator that sets a target value of the steering angle of the wheel and axle of the moving railroad vehicle, by using the radius of curvature estimated in the estimator; a controller that generates a steering control signal on the wheel and axle by comparing an actual steering angle of the wheel and axle with the target value of the steering angle of the wheel and axle, which is set in the calculator; and an actuator that steers the wheel and axle using the steering signal of the controller.

Description

technical field [0001] The present invention relates to an active steering control device and method for railway vehicles. More specifically, it relates to a method for estimating the curvature radius of a curve in real time when a train is running in a curve section, and controlling the wheel axle to have the best wheel axle steering according to the estimated curvature radius. An active steering control device and method for a railway vehicle that can greatly reduce the angle of attack (angle of attack) existing between the curve section and the wheel axle, thereby smoothly steering the railway vehicle in motion. Background technique [0002] In the past, when driving on the curve of railway vehicles, such as figure 1 As shown, there is an angle of attack (angle of attack) between the rail and the wheel axle, which has a bad influence on the smooth curve running of the vehicle, so that not only the friction between the flange of the wheel and the side of the rail is caused...

AI Technical Summary

Problems solved by technology

[0007] However, in the technology described in Granted Patent No. 10-0916594, the steering angle of the wheel shaft 12 is adjusted by applying rotational torque to the side slip direction of the wheel shaft 12 to detect whether it is a straight line or a curved line, and the steering angle of the wheel shaft 12 is adjusted in the curved line. Decrease the angle of attack to reduce the friction between the rail and the flange of the wheel during driving, thereby improving the ride quality and reducing the wear of the rail and the wheel. However, since the curvature of the curved line varies depending on the position, it should Curvature sets the steering angle of the wheel axle, but there is no structure to set the steering angle according to the angle of the driving curve in the past, so there is still an angle of attack when driving in a curve, so there is friction between the flange of the wheel and the side of the track and the resulting noise and wear of the wheels and tracks

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