Piezoelectric Structural Vibration Control Using Active Resonator Absorber

David W. Knowles, N. Jalili, Sriram Ramadurai
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引用次数: 2

Abstract

A novel dynamic vibration absorber is presented while exploring its practical implementation using piezoelectric ceramic (PZT) inertial actuators. It is referred to as active resonator absorber (ARA). The ARA is a passive absorber with an additional dynamic feedback compensator within the PZT actuator. Without any controller, the PZT inertial actuator becomes a passive vibration absorber due to the internal damping and stiffness properties of piezoelectric materials. Hence, it is inherently fail-safe. For active operation, the compensator parameters are designed such that a resonance condition is intentionally created within the absorber to mimic the vibratory energy from the system of concern to which it is attached. The resonance condition can be created through the appropriate design of the compensator and implemented through adjusting the external electrical voltage applied to the absorber. Because the parameters of the PZT actuators (i.e. stiffness, damping, and effective mass) are estimates, compensator designs based on these parameters would result in partial vibration suppression, when utilized in real applications. An auto-tuning method is, therefore, introduced to effectively tune the compensator parameters to improve vibration suppression quality. The effectiveness and stability of the proposed absorber is demonstrated through simulations when appended on a SDOF primary system.
利用有源谐振吸收器控制压电结构振动
提出了一种新型的动态吸振器,并探讨了利用压电陶瓷惯性作动器实现动态吸振器的方法。它被称为有源谐振吸收器(ARA)。ARA是一个被动吸收器,在PZT执行器内附加了一个动态反馈补偿器。在没有任何控制器的情况下,由于压电材料的内部阻尼和刚度特性,PZT惯性致动器成为被动吸振器。因此,它本质上是故障安全的。对于主动操作,补偿器参数的设计使得在吸收器内有意创建共振条件,以模拟它所连接的有关系统的振动能量。谐振条件可以通过补偿器的适当设计产生,并通过调节施加到吸收器上的外部电压来实现。由于PZT作动器的参数(即刚度、阻尼和有效质量)是估计的,因此在实际应用中,基于这些参数的补偿器设计将导致部分振动抑制。为此,提出了一种自整定方法来有效地整定补偿器的参数,以提高振动抑制质量。通过仿真验证了该吸波器的有效性和稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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