Active constrained-layer damping: A state-of-the-art review

Abstract

In this paper the authors discuss the progress that has been made over the past decade in active constrained-layer damping (ACLD). ACLD treatments combine the best features of passive and active control of structural vibrations. By way of introduction the paper describes well-established techniques for passive control of structural vibrations and noise. A concise discussion of the development of so-called 'smart' (or 'intelligent') actuators and sensors and the emergence of suitable control algorithms show how passive techniques were extended to produce ACLD. A comprehensive literature review follows. It is shown how the passive and active components of ACLD complement each other to enable control of both high and low frequency modes of vibration. The active elements allow structures to adapt to suit a changing environment while the passive elements provide a fail-safe mechanism. Because of the available technology, these bene ts are available without signi cant penalties in terms of cost, weight and complexity.

Modeling and Controlling an Active Constrained Layer (ACL) Beam Actuated by Two Voltage Sources With/Without Magnetic Effects

“…Hence plugging (20) in (19) yields Re A z, z H×H = D 0 z 2 , z 2 V ×V ≥ 0 by (14). We next verify the range condition.…”

“…See other control strategies i.e. in [20], and the references therein. However, even in the case of a single piezoelectric beam, as the dynamic effects are kept, a strongly coupled wave system is obtained for which it is shown that the model is not controllable and not uniformly exponentially stabilizable for almost all combinations of material parameters with the B * −type feedback, i.e.…”

Piezoelectric active control for workpiece chatter reduction during milling

“…A recent review article based upon active constrained layer damping [9] has distinguished between Independent Modal-Space Control, requiring collocation of sensor and actuator pairs, and coupled control. It was argued that coupled control requires fewer sensors and actuators to achieve the same performance.…”

Semi-Active Vibration Control of Laminated Composite Sandwich Plate – An Experimental Study

“…Furthermore, a range of semi-active control systems have been used in the various structural vibration control applications which include the controllable fluids, ER fluid and MR fluid. They provide the enhanced damping properties with only minimal power requirement compared to active and passive systems due to their controllable rheology (Spencer and Nagarajaiah [3], See [4], Stanway et al [5], Xu et al [6]). …”