負の直達項をもつ圧電バイモルフ梁の Integral Resonant 振動制御について

抄録

Integral resonant control (IRC) is a vibration control method in which integration of the measured displacements is positively fed back to the input force. It is necessary to know the transfer function of the control object for the model-based design of an IRC. This paper uses a piezoelectric bimorph beam used as the control object. The direct feedthrough term of the transfer function is usually positive, but we found the experimentally measured direct feedthrough was negative. This paper proposes a new model for the physical cause of the negative direct term of a piezoelectric bimorph. Even if the direct term is negative the negative imaginariness of the transfer function is not violated, and therefore stable vibration control by IRC is possible.