Abstract
Previous studies of semi-active vibration control methods using piezoelectric actuators and inductors mainly focus on vibration suppression of force excitation systems and free vibration systems. In general, appropriate control for these systems is increasing the damping of the structures. The increase of the damping is achieved by not only the control methods but also passive damping materials. Therefore, the merit of using the control methods is not clear, except for applications in extreme conditions which do not allow usage of passive damping materials. In contrast to these systems, active and semi-active methods generally have advantages over passive damping materials in vibration isolation of base excitation systems. Passive damping materials can not suppress both resonance response and transmissibility in frequency range higher than resonance frequency simultaneously. In this paper, one of the semi-active methods is applied to vibration isolation of a base excitation system. The numerical simulations of the system show that the semi-active method can suppress resonance response without increasing transmissibility in higher frequency range.
