Some Recent Developments in Adaptive Tuned Vibration Absorbers/Neutralisers

Abstract

The vibration absorber has been used for vibration control purposes in many sectors of engineering from aerospace, to automotive to civil, for the past 100 years or so. A limitation of the device, however, is that it acts like a notch filter, only being effective over a narrow band of frequencies. Recent developments have overcome this limitation by making it possible to tune the device over a range of frequencies. This has been achieved by incorporating a variable stiffness element that can be adjusted in real-time. In this paper, some ways in which stiffness change can be achieved in practice are reviewed and some examples of prototype adaptive tuned vibration absorbers (ATVAs) are described. A simple control scheme to automatically tune an ATVA is also presented.

Vibration Attenuation of Plate Using Multiple Vibration Absorbers

“…The latter approach using discrete masses or known as passive vibration absorbers, however, are more sound because they do not contribute significant additional vibration energy to the structure, besides demonstrated to yield substantial attenuation in structural vibration [8][9][10]. Nevertheless, it produces drawbacks such as the obvious weight increase, and improperly placement and frequency tuning of vibration absorber may result in large increase of vibration level [9,10]. The idea of passive vibration absorber emerges due to a common vibration issue existed in engineering structural applications.…”

Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System

“…To improve the performance of the passive vibration absorbers, many researchers investigated semi-active and active designs [13,14]. The semi-active absorbers have the capability of tuning their working resonant frequencies by adjusting the stiffness and/or damping of the absorbers.…”

Adaptive Piezoelectric Absorber for Active Vibration Control

“…To cancel narrowband, forced vibrations, the TVA can be tuned to the excitation frequency, as well. In this case, the device is just lightly damped and often referred to as a vibration neutralizer in the literature [2]. To achieve sufficient performance over a wider bandwidth, the mass of the vibration neutralizer can be increased; alternatively, the vibration neutralizer can be designed to adapt its resonance frequency and to track the excitation frequency.…”

“…Several basic concepts exist to adjust the resonance by actuation. Overviews can be found in [2][3][4]; also, some concepts will be introduced in the following section.…”