Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, 30 Pil-dong 1 Gil, Jung-gu, Seoul 04620, Korea.
Sensors (Basel). 2019 Jan 28;19(3):540. doi: 10.3390/s19030540.
In this paper, the active vibration control of a piezo-bonded laminated composite is investigated in the presence of sensor partial debonding and structural delamination. Improved layerwise theory, higher-order electric potential field, and the finite-element method were employed to develop an electromechanically coupled model for the two types of damage (i.e., sensor partial debonding and delamination). The developed model was numerically implemented on a single-input-multi-output (SIMO) system to demonstrate the effects of sensor partial debonding and structural delamination on the ability of a constant gain velocity feedback (CGVF) controller to attenuate vibration. The two types of damage were assessed in terms of controlled outputs of the sensors, nodal displacements, and control input signals being applied to the actuator to suppress vibrations. The obtained results showed that the sensor partial debonding and structural delamination have opposite effects on the vibration-attenuation characteristics of the CGVF controller. The presence of partial debonding in the sensor made the controller less able to suppress vibrations because of a spurious sensing signal, whereas structural delamination increased the control authority of the controller because of the loss of structural stiffness that results from structural delamination.
本文研究了在存在传感器部分脱粘和结构分层的情况下，对压电粘结层合复合材料的主动振动控制。采用改进的分层理论、高阶电势场和有限元方法，为这两种损伤（即传感器部分脱粘和分层）开发了一种机电耦合模型。所开发的模型在单输入多输出（SIMO）系统上进行了数值实现，以证明传感器部分脱粘和结构分层对恒增益速度反馈（CGVF）控制器衰减振动的能力的影响。这两种损伤是根据传感器的控制输出、节点位移以及施加到执行器以抑制振动的控制输入信号来评估的。得到的结果表明，传感器部分脱粘和结构分层对 CGVF 控制器的振动衰减特性有相反的影响。传感器中的部分脱粘会导致控制器产生虚假的传感信号，从而降低其抑制振动的能力，而结构分层会由于结构分层导致结构刚度的损失而增加控制器的控制能力。
