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首页> 外文会议>Conference on Active and passive smart structures and integrated systems; 20090309-12; San Diego, CA(US) >Vibration Control of Plates Featuring Periodic Arrays of Hybrid Shunted Piezoelectric Patches
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Vibration Control of Plates Featuring Periodic Arrays of Hybrid Shunted Piezoelectric Patches

机译：具有混合分流压电贴片周期阵列的板的振动控制

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摘要

Periodic arrays of hybrid shunted piezoelectric actuators are used to suppress vibrations in an aluminum plate. Commonly, piezoelectric shunted networks are used for individual mode control, through tuned, resonant RLC circuits, and for broad-band vibration attenuation, through negative impedance converters (NIC). Periodically placed resonant shunts allow broadband reduction resulting from the attenuation of propagating waves in frequency bands which are defined by the spatial periodicity of the array and by the shunting parameters considered on the circuit. Such attenuation typically occurs at high frequencies, while NICs are effective in reducing the vibration amplitudes of the first modes of the structure. The combination of an array resonant shunts and NICs on a two-dimensional (2D) panel allows combining the advantages of the two concepts, which provide broadband attenuation in the high frequency regimes and the reduction of the amplitudes of the low frequency modes. Numerical results are presented to illustrate the proposed approach, and frequency response measurements on a cantilever aluminum plate demonstrate that an attenuation region of about 1000 Hz is achieved with a maximum 8 dB vibration reduction.
机译：混合并联压电致动器的周期性阵列用于抑制铝板中的振动。通常，压电分流网络用于通过调谐谐振RLC电路进行单模控制，并通过负阻抗转换器（NIC）用于宽带振动衰减。周期性放置的谐振分流器允许宽带衰减，这是由于在阵列中的空间周期性以及电路上考虑的分流参数所限定的频带中传播波的衰减所致。这种衰减通常在高频下发生，而NIC可有效降低结构的第一模式的振动幅度。二维（2D）面板上的阵列谐振分流器和NIC的组合允许结合这两个概念的优点，这两个优点可在高频状态下提供宽带衰减，并减小低频模式的振幅。给出数值结果以说明所提出的方法，并且在悬臂铝板上的频率响应测量表明，在最大减少8 dB振动的情况下，可获得约1000 Hz的衰减区域。

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