Railway vehicle vibration damping device

Abstract

A railway vehicle vibration damping device includes an actuator interposed between a vehicle body and a truck and capable of exerting a control force; and a controller configured to obtain a target control force for reducing a vibration of the vehicle body based on a lateral acceleration of the vehicle body, and the controller includes a bandpass filter configured to extract a low frequency control force, which is a frequency component lower than a resonant frequency of the vehicle body, and a correcting part configured to correct a target control force based on the low frequency control force.

1 . A railway vehicle vibration damping device comprising:
 an actuator interposed between a vehicle body and a truck of a railway vehicle and capable of exerting a control force; and   a controller configured to control the actuator by obtaining a target control force for reducing a vibration of the vehicle body based on a lateral acceleration of the vehicle body,   wherein the controller includes   a filter configured to extract a low frequency control force, the low frequency control force being a frequency component lower than a resonant frequency of the vehicle body in the target control force, and   a correcting part configured to correct the target control force based on the low frequency control force.   
     
     
         2 . The railway vehicle vibration damping device according to  claim 1 ,
 wherein the correcting part corrects the target control force downward when the low frequency control force is equal to or larger than a threshold value.   
     
     
         3 . The railway vehicle vibration damping device according to  claim 1 ,
 wherein the correcting part corrects the target control force by multiplying the target control force by a correction gain having an upper limit value not larger than 1 when the low frequency control force is equal to or larger than a threshold value.   
     
     
         4 . The railway vehicle vibration damping device according to  claim 3 ,
 wherein the correcting part decreases the correction gain little-by-little while the low frequency control force is equal to or larger than the threshold value and increases the correction gain when the low frequency control force is smaller than the threshold value.