614 圧電素子の制振性能を高める機械的・電気的な手法に関する研究(振動制御応用,OS-12 スマート構造システム,総合テーマ「伝統を,未来へ!」)

概要

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This paper proposes mechanical and electrical techniques to improve the performance of piezoelectric elements as actuators and sensors. The bending stiffness of the target is reduced by the proposed methods at the attached range and the optimum conditions are derived based on impedance matching. Consequently, the efficiency of the piezoelectric element is significantly enhanced. The proposed mechanical technique extends the length of piezoelectric element equivalently using rigid spacers. The electric technique inserts a negative stiffness in parallel with the piezoelectric element. The optimum conditions are theoretically formulated and the effectiveness of the proposed methods was validated by the calculation and the experiment.
2010-09-14