Self-powered active control of elastic and aeroelastic oscillations using piezoelectric material
Self-powered active control of elastic and aeroelastic oscillations using piezoelectric material
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DOI：
10.1177/1045389x16685448
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发表时间：
2017-01
影响因子：
2.7
通讯作者：
T. Silva;C. De Marqui
中科院分区：
文献类型：
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作者：
T. Silva;C. De Marqui
在振动控制问题中，压电材料已被用作传感器和执行器。近年来，将压电换能器应用于基于振动的能量采集受到了极大的关注。本文研究了同时具有发电和驱动功能的多层结构的自能主动振动控制问题，其中一层用于能量回收和传感，另一层用于驱动，还有一个中心子结构。建立了机电耦合有限元模型和非定常气动模型相结合的压气弹性有限元模型。提出了一种基于传感压电层的电输出和能量采集能力来计算控制信号的电路。激励能量完全由收获的能量提供，这些能量也为电路的有源元件供电。首先，对简谐激励下电-机耦合梁自振主动衰减的数值预测进行了实验验证。然后，在另一个基本激励问题上，将自供电主动控制器的性能与传统主动控制器的性能进行了比较。在此基础上，采用自动力主动系统对板状机翼的颤振进行了减振。
Piezoelectric materials have been used as sensors and actuators in vibration control problems. Recently, the use of piezoelectric transduction in vibration-based energy harvesting has received great attention. In this article, the self-powered active vibration control of multilayered structures that contain both power generation and actuation capabilities with one piezoceramic layer for scavenging energy and sensing, another one for actuation, and a central substructure is investigated. The piezoaeroelastic finite element modeling is presented as a combination of an electromechanically coupled finite element model and an unsteady aerodynamic model. An electrical circuit that calculates the control signal based on the electrical output of the sensing piezoelectric layer and simultaneously energy harvesting capabilities is presented. The actuation energy is fully supplied by the harvested energy, which also powers active elements of the circuit. First, the numerical predictions for the self-powered active vibration attenuation of an electromechanically coupled beam under harmonic base excitation are experimentally verified. Then, the performance of the self-powered active controller is compared to the performance of a conventional active controller in another base excitation problem. Later, the self-powered active system is employed to damp flutter oscillations of a plate-like wing.