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TECHNICAL BRIEF

Experimental Studies on Active Vibration Control of a Beam Using Hybrid Active∕Passive Constrained Layer Damping Treatments

[+] Author and Article Information
Pankaj K. Langote

Structures Group,  ISRO Satellite Centre, Airport Road, Vimanapura Post, Bangalore, Karnataka, 560017, IndiaPankajLangote@yahoo.com

P. Seshu1

Mechanical Engineering Department,  Indian Institute of Technology, Powai, Mumbai, Maharashtra, 400076, IndiaSeshu@iitb.ac.in

1

Corresponding author.

J. Vib. Acoust 127(5), 515-518 (Mar 12, 2005) (4 pages) doi:10.1115/1.2013292 History: Received January 07, 2004; Revised March 12, 2005

Hybrid damping designs with active piezoelectric materials and passive viscoelastic materials (VEMs) combine the advantages of both active and passive constrained layer damping treatments. In this study, experiments have been conducted on nine systems viz., bare beam, active damping (AD), passive constrained layer damping (PCLD—three variants) and hybrid active∕passive constrained layer damping (Hybrid AD∕PCLD—four variants). Based on the time domain analysis of these systems, it is shown that the “best” performance is obtained using a hybrid damping configuration wherein the VEM and the piezoelectric layers are acting separately.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Layout of different systems investigated

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Figure 2

Schematic of the experimental setup for closed loop vibration control

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Figure 3

Comparison of free vibration response at the tip

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Figure 4

Comparison of forced vibration response before and after control (kDVF=−1.5)

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