An experimental study of active vibration control of composite structures with a piezo-ceramic actuator and a piezo-film sensor

Abstract

In order to reduce the vibrational level of lightweight composite structures, active vibration control methods have been applied both numerically and experimentally. Using the classical laminated beam theory and Ritz method, an analytical model of the laminated composite beam with piezoelectric sensors and actuators has been developed. Smart composite beams and plates with surface-bonded piezoelectric sensors and actuators were manufactured and tested. It is found that the developed analytical model predicts the dynamic characteristics of smart composite plates very well. Utilizing a linear quadratic Gaussian (LQG) control algorithm as well as well known classical control methods, a feedback control system was designed and implemented. A personal computer (PC) was used as a controller with an analogue-digital conversion card. For a cantilevered beam the first and second bending modes are successfully controlled, and for cantilevered plates the simultaneous control of the bending and twisting modes gives a significant reduction in the vibration level. LQG has shown advantages in robustness to noise and control efficiency compared with classical control methods. In this study examples of control spillover are demonstrated via the instantaneous power spectrum of the sensor output.

Analysis of Vibration Detection Using Active Controller in the Smart Cantilever Composite Beam with LQR and Fuzzy Techniques

“…Compared to other controllers, LQR controller is more advantageous, because it is robust for longitude and lateral flight dynamics of an aircraft control system, and hence achieves great dynamic performance and also good stability in aircraft networks [7].…”

Development of Integrated Simulation Tool for Jitter Analysis

“…During such cases, active vibration control of structures [18] or implementation of vibration isolator is a feasible solution to limit the transmission of excessive vibration to sensitive optical payloads [19]. The most commonly used vibration isolators are the passive type and they are simple and reliable.…”

Experiments on resonant vibration suppression of a piezoelectric flexible clamped–clamped plate using filtered-U least mean square algorithm

“…Control strategies are usually based on the closed-loop feedback. A lot of excellent results have been achieved (Fanson and Caughey, 1990;Fazelzadeh and Jafari, 2008;Han et al, 1997;Kumar et al, 2007;Qiu et al, 2015;Sharma et al, 2007). The characteristic of the feedback control is that the controller only acts after the error signal appears.…”