鉄道車両の1次ばね系の減衰制御による上下振動低減 : 車両諸元による制振性能への影響(<特集>D&D 2008)

概要

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In order to improve the riding comfort for passengers on railway vehicles, it is effective to suppress the vibration of the vertical bending mode. Therefore, the primary suspension damping force control system with variable axle damper is under development, which enables to control its damping force continuously. This paper reports how the relationship between the natural frequencies of the primary suspension and that of the first bending mode of the carbody influences the vibration reduction performance of this system. Numerical simulations and running tests have been carried out, and the results have indicated that the efficiency of vibration suppression is dependent on that relationship. More concretely, a velocity feedback of the vibration of truck frames, i.e. a skyhook control low, has been effective when the both natural frequencies are close. On the other hand, model-based control lows such as an LQG control should be introduced if the natural frequency of the bending vibration of the carbody exists apart from those of the vertical bouncing and pitching motions of the truck frames.
2009-05-25