压电分流阻尼, 分流电路, 压电陶瓷, 结构振动

With an example of clamped rectangular panel, the vibration control performances of three different types of piezoelectric shunt damping approaches, such as RL series circuit, RL parallel circuit and RL-C circuit, were experimentally analyzed and compared. Experimental results show that the vibration of the structure can be reduced significantly by using these shunt circuits with optimal parameters. Furthermore, it is found that the RL series and RL parallel shunt circuits have the same control performances basically.The RL-C parallel circuit can reduce the value of the inductance L due to the insertion of an external capacitance C. However, the control performance will be reduced simultaneously. The experimental results also show that the shunt circuits are very sensitive to inductance tuning errors. The control performances of these shunt circuits may reduce significantly if the inductances are different with the optimal values.