Dr. Tadao Takigami Profile

Dr. Tadao Takigami

at Railway Technical Research Institute

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Proceedings Article | 16 May 2005 Paper

Vibration suppression of scale model of railway carbody with piezoelectric elements: a study focused on designing shunt circuits

Tadao Takigami, Takahiro Tomioka

Proceedings Volume 5760, (2005) https://doi.org/10.1117/12.600960

KEYWORDS: Resistors, Resistance, Capacitors, Ferroelectric materials, Inductance, Amplifiers, Electrodes, Capacitance, Beam shaping, Motion models

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The goal of this study is to reduce the bending vibration of railway vehicles by applying a vibration suppression technique. The technique utilizes piezoelectric elements that are electrically shunted by an external circuit. This paper presents an investigation by using a scale model of a Shinkansen vehicle with a length of about 5m, mainly focused on implementation of shunt circuits. Small pieces of piezoelectric elements are bonded to its floor structure and electrically connected to a shunt circuit. The authors propose a new method to implement shunt circuits, a part of which is virtually realized. The circuits are designed for practical use under the condition of high voltage generated by the elements. Two types of shunt circuits are tested in this study. One is equivalent to an inductor and a resistor in series, and the other consists of a negative capacitor and a resistor. In actuality, the inductor and the negative capacitor are replaced by virtually realized impedance components. Results of excitation tests show that the circuits implemented based on the proposed method function as expected and bending vibration of the carbody can be reduced successfully.

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