Multifunctional design of inertially-actuated velocity feedback controllers


Elliott, S.J., Rohlfing, J. and Gardonio, P. (2012) Multifunctional design of inertially-actuated velocity feedback controllers. Journal of the Acoustical Society of America, 131, (2), 1150-1157. (doi:10.1121/1.3672694).

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Description/Abstract

The vibration of a structure can be controlled using either a passive tuned mass damper or using an active vibration control system. In this paper, the design of a multifunctional system is discussed, which uses an inertial actuator as both a tuned mass damper and as an element in a velocity feedback control loop. The natural frequency of the actuator would normally need to be well below that of the structure under control to give a stable velocity feedback controller, whereas it needs to be close to the natural frequency of a dominant structural resonance to act as an effective tuned mass damper. A compensator is used in the feedback controller here to allow stable feedback operation even when the actuator natural frequency is close to that of a structural mode. A practical example of such a compensator is described for a small inertial actuator, which is then used to actively control the vibrations both on a panel and on a beam. The influence of the actuator as a passive tuned mass damper can be clearly seen before the feedback loop is closed, and broadband damping is then additionally achieved by closing the velocity feedback loop.

Item Type: Article
ISSNs: 0001-4966 (print)
Keywords: damping, resonance, structural acoustics, vibration control
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering and the Environment > Institute of Sound and Vibration Research > Signal Processing & Control Research Group
ePrint ID: 336714
Date Deposited: 03 Apr 2012 12:34
Last Modified: 27 Mar 2014 20:20
URI: http://eprints.soton.ac.uk/id/eprint/336714

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