Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2018
Date : August 28, 2018 - August 31, 2018
The elastic vibrations of the carbody tend to have influence on riding comfort in recent railway vehicles. In particular, the modes similar to the first bending mode of free supported elastic beam (“B mode”) and diagonal distortion mode (“D mode”) are important. These vibration modes have natural frequencies around 10Hz which is known to be a sensitive frequency range for human. We proposed a method for multi-modal vibration reduction using active mass dampers (AMDs) to reduce such vibrations. As the result of the running tests on an actual truck, it was confirmed that the vibration reduction effect on B mode and D mode could be obtained. In this paper, H-infinity control theory is used for controller design in order to improve control effect. In order to use this theory, a numerical analytical model was created and a method to reduce the dimension of the model was proposed. As the next step, the controller was designed by using the reduced model, and the excitation tests by using the Shinkansen type test vehicle were performed. As the results, it was confirmed that the vibration reduction effect on B mode and D mode could be obtained. Furthermore, it was shown that the ride comforts were improved on the all measurement points on the floor in simulated running condition.
