Vibration Control Generated by Rotating Machinery of Railway Vehicle Carbody Using Active Mass Damper (Fundamental Test with Actual Vehicle)

Abstract

Railway vehicles are equipped with rotating machinery such as engine, motor and compressor. Vibrations generated by the rotating machinery affect the riding quality of the customer when the vibrations are transmitted to the floor of the carbody. In order to isolate the vibrations, the rotating machinery is generally supported by rubber isolator whose spring coefficient is adjusted for each device. However, depending on the mounting structure, it is difficult to obtain a sufficient vibration isolation effect in some cases. This paper introduces a reduction method of the vibrations by setting an active mass damper (AMD) near the rotating machine for such cases. First, stationary excitation tests using a test vehicle and a vertical exciter are performed. In the test, the controller design method to obtain the effective vibration reduction was established, and the effectiveness of the proposed method was confirmed using a test vehicle. Secondly, a test using commercial vehicle equipped with the actual rotating machinery was performed. In the test, the rotating machine was driven while the vehicle was stopped, and the AMD was controlled as designed. The test results show that the vibration from rotating machinery can be reduced by controlling AMD.