Use of Lightweight Piezo-composite Actuators to Suppress the Free Vibration of an Aluminum Beam

Abstract

A lightweight piezo-composite actuator (LIPCA) is used to suppress the vibration of an aluminum beam. Composed of a piezoelectric layer, a carbon-epoxy layer, and glass-epoxy layers, the LIPCA has better performance and durability than bare piezoelectric ceramics (PZT). This study estimates the actuation performances of a LIPCA in an active vibration control as well as a static actuation test. Experiments are performed on an aluminum beam in a cantilever configuration. The LIPCA, a bare PZT, and a 3GE þ PZT actuator are attached to the aluminum beam with adhesive in order to investigate their performance. A comparison of the equivalent actuation moment and the tip deflection of the beam between the LIPCA, the bare PZT, and the 3GE þ PZT actuator shows that the LIPCA has a better actuation performance than the bare PZT and the 3GE þ PZT actuator. In addition, a digital PID control algorithm is applied to the active vibration control system to show how the LIPCA performs as an actuator in an active vibration suppression system. The results show that the LIPCA can effectively suppress free vibration of the aluminum beam, compared to the bare PZT and the 3GE þ PZT actuator. The experiment confirms that the LIPCA can be used as an actuator to suppress vibration of dynamic structures.

μ-Synthesis Controller Design for Seismic Alleviation of Structures with Parametric Uncertainties

“…where matrices K (j) and can be obtained from equations (8), (10) and (11), by replacing the damping coefficients , and by the corresponding stiffness coefficients , and . The control location matrix T u has the following structure (14) Note that when there are no actuators in the neighborhood buildings, and are replaced by and , respectively.…”

“…The main classic controls used for active and semi-active vibration control are PID, positive position feedback (PPF), pole placement control (PPC) and velocity feedback control (VFC). PID controllers can be easily implemented and have fast response [11,12], however, it is only appropriate for one variable as well as simpleinput simple-output (SISO) systems and are not robust to parameter variation caused by the structure [13]. PPF controller is able to tackle the target mode without disturbing other modes and is insensitive to spillover [14].…”

Lookup table control method for vibration suppression of a flexible manipulator with optimization of the minimum settling time and energy consumption

“…The actuation moment of a LICPA is larger than that of a bare PZT actuator, and the LIPCA outperforms a bare PZT actuator in terms of suppressing the vibration of an aluminum beam [14]. Moreover, the actuation performance of the LIPCA is known to persist without diminishing, even when attached to a flat surface [15].…”

“…With recent developments in sensor and actuator technologies, many researchers have concentrated on the use of smart materials, such as lead zirconium titanate (PZT), to suppress the vibration of a beam [2,[8][9][10][11] as well as for vibration isolation [12]. The unimorph lightweight piezo-composite actuator (LIPCA) developed by Yoon et al has become a suitable alternative to a bare PZT actuator on account of its good actuation displacement and durability [13]; it also outperforms a bare PZT actuator in terms of suppressing the vibration of an aluminum beam [14].…”

A novel fast model predictive control with actuator saturation for large-scale structures

“…Although passive control and/or semi-active control do not have a large power demand and offer high reliability at the expense of reducing control effectiveness, active control has still been a hot topic in recent years. In the past several years, great progress has been made in advancing the theory and practice of structural active control methods, such as classic control methods, including PID control [6], positive position feedback (PPF) [7], and velocity feedback control (VFC) [8], and modern control methods, including linear quadratic optimal control [9,10], H∞ theories [11,12], sliding mode control [13,14], and neural networks [15,16], which were developed to reduce building vibration under earthquake or wind excitation. However, when designing a controller for the active vibration control of structures, besides the control performance that must be considered, some practical issues should be considered in the controller design process as well [17].…”