Initial studies into the use of active constrained-layer damping for controlling resonant vibration

Ben Azvine; Geoffrey R. Tomlinson; R. J. Wynne

doi:10.1117/12.174092

1 May 1994 Initial studies into the use of active constrained-layer damping for controlling resonant vibration

Ben Azvine, Geoffrey R. Tomlinson, R. J. Wynne

Proceedings Volume 2193, Smart Structures and Materials 1994: Passive Damping; (1994) https://doi.org/10.1117/12.174092
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

The work described in this paper is concerned with controlling the strain of the constraining layer of a composite structure in such a way as to enhance the shear generated in the viscoelastic material and hence improve the overall damping of the composite structure. The results have indicated that this concept of active damping produces very effective levels of vibration suppression. In the case of cantilever beams the first two modes can be almost eliminated when velocity feedback of the beam tip is used. The results show that the addition of active control and passive damping in a single structure combines the advantages of passive damping in the higher modes and active control in the lower modes. In addition active damping as defined in this paper produces a fail safe mechanism in case of instability occurring in the feedback loop since passive damping is always present.

Citation Download Citation

Ben Azvine, Geoffrey R. Tomlinson, and R. J. Wynne "Initial studies into the use of active constrained-layer damping for controlling resonant vibration", Proc. SPIE 2193, Smart Structures and Materials 1994: Passive Damping, (1 May 1994); https://doi.org/10.1117/12.174092

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