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首页> 外文会议>Conference on active and passive smart structures and integrated systems >Multimodal vibration damping through a periodic array of piezoelectric patches connected to a passive network
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Multimodal vibration damping through a periodic array of piezoelectric patches connected to a passive network

机译：通过连接到无源网络的压电贴片的周期性阵列进行多峰振动阻尼

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In damping devices involving piezoelectric elements, a single piezoelectric patch cannot consistently achieve multimodal control because of charge cancellation or vibration node location. In order to sense and control structural vibration on a prescribed frequency range, a solution consists in using an array of several piezoelectric patches being small compared to the smallest wavelength to control. Then, as an extension of the tuned mass damper strategy, a passive multimodal control requires to implement a damping system whose modes are as close as possible to those of the controlled structure. In this way, the electrical equivalent of the discretized mechanical structure represents the passive network that optimizes the energy transfer between the two media. For one-dimensional structures, a periodic distribution in several unit cells enables the use of the transfer matrix method applied on electromechanical state-vectors. The optimal passive networks are obtained for the propagation of longitudinal and transverse waves and a numerical implementation of the coupled behavior is performed. Compared to the more classical resonant shunts, the network topology induces promising multimodal damping and a reduction of the needed inductance. It is thus possible to create a completely passive electrical structure as it is demonstrated experimentally by using only purely passive components.
机译：在涉及压电元件的阻尼装置中，由于电荷抵消或振动节点的位置，单个压电贴片不能始终如一地实现多峰控制。为了感测和控制在预定频率范围上的结构振动，一种解决方案在于使用多个压电片的阵列来控制，该压电片与最小波长相比较小。然后，作为调谐质量阻尼器策略的扩展，无源多峰控制需要实现一种阻尼系统，该阻尼系统的模式应尽可能接近受控结构的模式。这样，离散化机械结构的电气等效物代表了优化两种介质之间能量传递的无源网络。对于一维结构，几个单位单元中的周期性分布使得能够使用应用于机电状态向量的传递矩阵方法。获得最佳无源网络用于纵向和横向波的传播，并执行耦合行为的数值实现。与更经典的谐振分流器相比，网络拓扑结构带来了有希望的多峰阻尼和所需电感的减小。因此，可以通过仅使用纯无源组件来创建完全无源的电气结构，如通过实验证明的那样。

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