機械式動吸振器に圧電素子とLR回路で構成された電気式動吸振器を組合わせた二重動吸振器の最適設計式の提案

抄録

Abstract Multiplexing dynamic vibration absorbers (DVAs) provide better vibration control compared to that obtained with single-mass DVAs; however, their structure is more complicated and thus difficult to apply in practice. This paper proposes several optimal design formulas for an electromechanical DVA in which a mechanical single-mass DVA with a piezoelectric element between the primary and absorber masses and a series LR circuit is coupled to the element. The inductor and piezoelectric element act as a virtual mass and a virtual spring, respectively, and thus the circuit works as a kind of double-mass DVA. In the present study, such an electromechanical DVA was optimized based on three design criteria (H_∞, H₂, and stability criteria) and its simple design formulas were derived.