軌道側からの加振条件を考慮した鉄道車両の２次ばね系の上下振動制御

（在来線車両を用いた走行試験結果）

抄録

Some conventional railway tracks are subject to lower maintenance criteria, unlike Shinkansen lines. This usually implies large vertical irregularities and/or depressions at the rail joints, which are a known cause of vertical rigid-body-mode vibration of the car body. Since suppressing such vibration is necessary for improving ride comfort, a secondary suspension damping force control system with variable vertical dampers (a vibration control system) is being developed. For improving the performance of vibration suppression of the system, a control technique taking into account forced vibration caused by running through depressions at the rail joints was proposed. While the vehicle runs at a constant speed, the frequency of the forced vibration stays constant. Therefore, the weighting functions for controlled variables are set with a large value at the frequency so as to reduce the forced vibration selectively. This paper reports the results of the running test using an actual meter-gauged railway vehicle applyed the proposed technique, and the technique can effectively suppress vertical rigid-body-mode vibration of the car body.