Structural Vibration Suppression Using the Piezoelectric Sensors and Actuators

Abstract

An experimental study for the active vibration control of structures subject to external excitations using piezoelectric sensors and actuators is presented. A simply supported plate and a curved panel are used as the controlled structures in two experiments, respectively. The Independent Modal Space Control (IMSC) approach is employed for the controller design. In order to increase the adaptability, the time-domain modal identification technique is incorporated into the controller to real-time update the system parameters. The adaptive effectiveness of the time-domain modal identification technique is tested by fixing an additional mass on the simply supported plate to change its structural properties. The vibration suppression performances of the controller are 5.7 dB and 10.8 dB for the simply-supported plate with/without the mass subject to a chirp sine excitation, respectively. For the experiment of the curved panel subject to a sinusoidal excitation, the vibration attenuation of the control scheme is 5.0 dB even the control circuit is subject to some noise generated by electrical and magnetic interferences.

The complete synchronization condition in a network of piezoelectric micro-beams

“…We can deduce from the stability analysis and from (20) that when N increases, the number of transverse modes increases and the fastest (corresponding to l max ) has a velocity 4 ω 2 if N is even or 4 ω 2 sin 2 ( (N −1)π 2N ) if N is odd, while the slowest (when l = 1) has a velocity 4 ω 2 sin 2 ( π N ). When the coupling strength κ increases, first the fastest transverse mode point oversteps its first boundary and the network enters into the clustering regime.…”

“…By integrating (20) for different l and any size array N and computing the asymptotic growth rate of a chosen initial vector η l (0) (giving chaotic system when l = 0), for each value of κ, the stability of the synchronized state is then determined. Figure 7 presents a few of the largest transverse Lyapunov exponents when the number of oscillators is N = 32 for both cases DH x 2 and DH x 1 .…”

“…This work is motivated by many potential applications of electromechanical structure testing and control systems in engineering. Our work contributes to the theoretical analysis (mathematical modelling and simulation) of this wide range of work carried out in laboratories dealing with micro-structures and applications [19,20].…”

Variable stiffness smart structure systems to mitigate seismic induced building damages

“…In this paper, a problem is formulated with the implementation of variable stiffness, using piezoelectric actuators [9]. A number of studies have been presented where vibration of a beam or plate is controlled by applying piezoelectric patches [10][11][12][13][14][15][16][17][18][19]. A summary of the different system implementation configurations and methods used for structural control are included in Table II.…”

Active Vibration Control of Aluminium Flexible Structure Using Optimal Controller

“…Y.Y. Lee and J. Yao [6] proposed the way in which piezoelectric sensors and actuators are used for structural vibrations suppression. The independent modal space control approach is employed by them for the controller design.…”