Improvement of Ride Quality of Railway Vehicle by Semiactive Secondary Suspension System on Roller Rig Using Magnetorheological Damper

Abstract

Ride quality became a very important factor in the performance of railway vehicles according to the expansion of high-speed railways and speedup of velocity of railway vehicles. In this study, the results of applying the MR (magnetorheological) lateral damper on the secondary suspension to reduce the vibration of the car body, directly relating to the ride quality of railway vehicles, were mentioned. In order to verify the control performance of MR dampers, a 1/5 scaled railway vehicle model was constructed, and numerical simulation and experimental tests were conducted. The MR damper for the experimental tests was produced and was attached between the car body and bogie of a full scaled vehicle, and a vibration controlling test was performed to improve ride quality on a roller rig. The skyhook control algorithm was used as the controlling technique, and regarding the test results, the RMS (root mean square) value was found by compensating the frequency of the lateral vibration based on the UIC 513 R Standard about the ride quality of railway vehicles. As a result of the test, it could be confirmed that vibration was reduced by approximately 24% when attaching the MR damper between the bogie and the car body compared to when applying a passive damper.

Active suspension in railway vehicles: a literature survey

“…In Korea, studies for semi-active suspensions through rig tests and field tests in the last decade were carried out in the last decade [84][85][86][87][88]. Shin et al [84][85][86] carried out 1:5 scaled ( Fig. 20) and full-scale [86] roller rig tests to study the effects of semi-active lateral suspension with MR dampers at different speeds.…”

“…Shin et al [84][85][86] carried out 1:5 scaled ( Fig. 20) and full-scale [86] roller rig tests to study the effects of semi-active lateral suspension with MR dampers at different speeds. The classic sky-hook control and later H 1 control were applied to suppress the vibration.…”

Investigation of dynamic motions and vibration reduction methods in railway vehicles

“…Çalışmalarda sönümleyiciler genellikle Skyhook yöntemi ile kontrol edilmiştir [22], [23]. Yapısında manyetik alan ile kontrol edilebilen magneto reolojik sıvı içeren Magneto Reolojik (MR) sönümleyiciler çözüm olarak sunulmaktadır [24], [25].…”

An Experimental Design of Bypass Magneto-Rheological (MR) damper

“…The properties of MR damper can be changed by changing applied current [1]. MR damper have been chosen over a decade for vehicle suspension system [2][3][4], helicopters seat [5], civil structure base isolation [6][7][8], and railway transport [9,10]. Semi-active MR damper is especially applicable for unpredictable motion conditions and capable large payload condition.…”