Self-switching and resistive circuits for a piezo patch in vibration suppression

A self-switching circuit and a resistive circuit are designed and implemented for vibration suppression with a piezo patch in this study. A numerical model is developed for a rectangular beam bonded with a pair of piezo patches. One piezo patch is used to excite the system, the other one being used for vibration damping. Optimal resistances are respectively determined for the resistive circuit and self-switching circuit, and a new switch law is proposed for the switching circuit. These two circuits are implemented in an experimental setup to verify the model. Experimental results show that the vibration of a clamped beam can be effectively damped by using the resistive circuit or switching circuit. Due to the fact that switching is not perfect in practice, the damping performance of the switching circuit is a little different from the simulated result.

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