Adaptive Piezoelectric Absorber for Active Vibration Control

Abstract

Passive vibration control solutions are often limited to working reliably at one design point. Especially applied to lightweight structures, which tend to have unwanted vibration, active vibration control approaches can outperform passive solutions. To generate dynamic forces in a narrow frequency band, passive single-degree-of-freedom oscillators are frequently used as vibration absorbers and neutralizers. In order to respond to changes in system properties and/or the frequency of excitation forces, in this work, adaptive vibration compensation by a tunable piezoelectric vibration absorber is investigated. A special design containing piezoelectric stack actuators is used to cover a large tuning range for the natural frequency of the adaptive vibration absorber, while also the utilization as an active dynamic inertial mass actuator for active control concepts is possible, which can help to implement a broadband vibration control system. An analytical model is set up to derive general design rules for the system. An absorber prototype is set up and validated experimentally for both use cases of an adaptive vibration absorber and inertial mass actuator. Finally, the adaptive vibration control system is installed and tested with a basic truss structure in the laboratory, using both the possibility to adjust the properties of the absorber and active control.

Vibration Control of an Aero Pipeline System with Active Constraint Layer Damping Treatment

“…PD control is too simple, and simple LQC control is difficult to make optimal in practical applications due to various conditions [14][15][16]. The existing active vibration control on different objects [17][18][19][20][21] has a better control effect on low frequency, strong adaptability to the external environment, and can automatically follow the change of vibration characteristics [22]. The design flexibility is great, but the closed-loop control system has many links, and the stability of the system needs to be further improved.…”

Characterization of PZT/PVDF Composite Film as Functional Material

“…In this regard, several studies have been conducted and different kind of materials used, such as polymers, fiber composites, and metallic foams, depending on the application. The main objective is to integrate the actuation mechanism that controls the structural motion with the sensing mechanism that monitors the structure [2]- [6]. The number of papers on this subject has increased considerably with the growing interest in nanomaterials [7]- [9] and the corresponding range of applications.…”

Piezoelectric Plates Distribution for Active Control of Torsional Vibrations

“…The second one has a large bandwidth and can adapt the damping to time-dependent loads so that they turn out to be more efficient [1][2][3][4]. In recent years, the development of the smart materials for application in damping systems has made considerable progress and among these, the piezoelectric materials have a great adaptability [5][6][7][8][9][10][11][12]. The relation between electric field and strain makes them versatile to be used as sensor or actuators [13].…”