118 エアシリンダを用いた鉄道車体の上下弾性振動制御

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  • 118 Vertical Vibration Control of Railway Vehicle by Air Cylinder

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Recently, railway vehicle are becoming lighter since it corresponds not only to the improvement of the running speed but also to the reduction of running cost and noise. However, this causes the increase in a vertical vibration of car body. In addition, the deterioration of riding comfort concerns to this issue, because the natural frequency of the above mentioned vertical vibration overlaps with human's uncomfortable sensitive frequency band (around 6-10Hz). Up to now, there have been many strategies for the vibration suppression, i.e. a method to conduct active control for the secondary suspension system between the body and bogie, and a method to attach visco-elastic layers and constraint layers on the outside sheathing of the car body. The authors introduced the smart structure concept to the active vibration control of the railway body. Stack type piezo-electric actuators were used and good control performances were obtained for elastic vibration by experiments for 1/6 scale model. And rigid body vibration was also controlled by linear actuators. In this study, only air cylinders were used, because normally train system has pneumatic source. Simulation studies and experiments using scale model were conducted, and the effectiveness of the proposed control was confirmed.

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