The vibration control of railway vehicles is one important pillar of research themes at Nagai Laboratory,
and in particular, research on vibration control systems for Maglev vehicles which began from about ten years
ago and continues to be conducted by lab members. In recent years vibration control of the primary suspension
between the bogies and guideway was combined with the control of the secondary suspension between the car bodies
and bogies, and systems aiming to reduce vibrations for increasingly wider ranges of frequencies and optimal
actuator arrangements adapted to each vibration mode for lateral and rolling motions were proposed. Currently,
in addition to conventional feedback systems, feedforward systems (preview control) utilizing preview information
from the front of the vehicle are being studied for their effectiveness in improving vibration control.