The rolling stock test plant at RTRI is used to test railway vehicles by forcefully oscillating its rotating rail wheels in the lateral direction to simulate actual track irregularities. However, the lateral vibration acceleration of car body measured on the test plant is different from that observed when a car runs on actual lines. This phenomenon is conspicuous in particular when the irregularity wavelength is short. It is difficult to predict actual characteristics of vehicle dynamics at high precision, therefore, from the tests to use actual irregularity data as it is. Thus, we numerically determined a weighting function to be applied to the track irregularity data to reproduce the actual car body response characteristics on the test plant and developed a system to oscillate the rail wheels accordingly.

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