圧電式可変負剛性を用いた片持ちはり型動吸振器の固有振動数の自動調整

抄録

This paper describes a cantilever-type dynamic vibration absorber whose natural frequency can be tuned by using piezoelectric negative stiffness. Because the property of the negative stiffness is determined by the capacitance of the negative capacitor which is coupled to the piezoelectric element, the natural frequency of the cantilever-type dynamic vibration absorber can be tuned by using a variable capacitor for the negative capacitor. In this research, we proposed a new tuning method for the natural frequency of the dynamic vibration absorber using the phase difference between the host structure and dynamic vibration absorber. The effectiveness of the proposed method was verified through simulations and experiments.