Active Vibration Suppression of Sandwich Beams using Piezoelectric Shear Actuators: Experiments and Numerical Simulations
Active Vibration Suppression of Sandwich Beams using Piezoelectric Shear Actuators: Experiments and Numerical Simulations
复制标题
DOI：
10.1177/1045389x05053154
复制
发表时间：
2005-06
影响因子：
2.7
通讯作者：
Brian P. Baillargeon;S. Vel
中科院分区：
文献类型：
--
作者：
Brian P. Baillargeon;S. Vel
本文论述了压电剪切作动器对智能结构振动抑制的实验和数值评估。实验结果提出了自适应夹层悬臂梁，由铝饰面和两个压电剪切致动器和泡沫组成的核心。垂直于压电驱动器的极化方向施加电场，以引起夹层梁的横向剪切变形。主动振动抑制是通过正位置反馈或应变率反馈实现的。该控制系统使用Matlab/Simulink和dSPACE数字控制器实时实现。首先，通过使用一个剪切致动器激励梁和另一个控制其振动的自适应梁的频率响应进行了研究。参数研究进行评估控制器参数对系统的频率响应的影响。实验频率响应函数比较以及使用有限元法的数值模拟。接下来，在时域中的主动振动抑制系统的有效性进行了分析，使用的检验质量致动器，该致动器被附接到悬臂梁的尖端，以提供可重复的振动输入。实验和数值模拟表明，剪切致动器可以提供显着减少的尖端加速度和建立时间。
This article deals with the experimental and numerical assessment of the vibration suppression of smart structures using piezoelectric shear actuators. Experimental results are presented for an adaptive sandwich cantilever beam that consists of aluminum facings and a core composed of two piezoelectric shear actuators and foam. The electric field is applied perpendicular to the poling direction of the piezoelectric actuators to cause transverse shear deformation of the sandwich beam. Active vibration suppression is achieved using either positive position feedback or strain rate feedback. The control system is implemented in real-time using Matlab/Simulink and a dSPACE digital controller. First, the frequency response of the adaptive beam is investigated by using one shear actuator to excite the beam and the other to control its vibration. Parametric studies are conducted to assess the influence of controller parameters on the frequency response of the system. The experimental frequency response function compares well with numerical simulations using the finite element method. Next, the effectiveness of the active vibration suppression system in the time domain is analyzed using a proof-mass actuator that is attached to the tip of the cantilever beam to provide a repeatable vibration input. Experiments and numerical simulations show that the shear actuators can provide significant reduction in tip acceleration and settling time.