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Recent Developments in Vibration Damping and Control using Piezoelectric Transducers

Research on shunted piezoelectric transducers, conducted mainly over the past decade, provides new opportunities for control of vibration and damping in flexible structures. This is made possible by the strong electromechanical coupling associated with modern piezoelectric transducers. In vibration control applications a piezoelectric transducer is bonded to, or embedded in a base structure. As the structure deforms, the piezoelectric element strains and converts a portion of the structural vibration energy into electrical energy. By shunting the piezoelectric transducer to an electrical impedance, a part of the induced electrical energy can be dissipated. Hence, the impedance acts as a means of extracting mechanical energy from the base structure. This talk presents an overview of recent research related to the use of shunted piezoelectric elements for vibration damping and control. It will be demonstrated that the problem of piezoelectric shunt damping can be viewed as a feedback control problem with a specific feedback structure, and a number of high performance impedance structures will be introduced. Furthermore, an effective method for implementing such impedances will be discussed.
Type of Seminar:
Public Seminar
Prof. Reza Moheimani
School of Electrical Engineering & Computer Science
Jul 05, 2004   17:15

ETH-Zentrum, ETZ E8, Gloriastrasse 35, 8006 Zurich
Contact Person:

D. Niederberger
No downloadable files available.
Biographical Sketch:
Reza Moheimani received the B.Sc. degree from Shiraz University in 1990 and the M.Eng.Sc and Ph.D. degrees from the University of New South Wales, Australia in 1993 and 1996 respectively, all in Electrical and Electronics Engineering. In 1996 he was a Postdoctoral Research Fellow at the School of Electrical and Electronics Engineering, Australian Defence Force Academy, Canberra, Australia. In 1997 he joined the University of Newcastle, Australia where he is currently an Associate Professor in the School of Electrical Engineering and Computer Science. He has over 100 journal and conference publications, is a co-author of the research monograph "Spatial Control of Vibration: Theory and Experiments" (World Scientific, 2003) and editor of the volume "Perspectives in Robust Control" (Springer Verlag, 2001). Dr. Moheimani is an Associate Editor of IEEE Transactions on Control Systems Technology, and former Associate editor of Control Engineering Practice. He has served on the editorial boards of several international conferences, and is the Chairman of International Program Committee for the 3rd IFAC Symposium on Mechatronic Systems, to be held in Sydney, Australia in September 2004. He is a member of the ARC Centre for Complex Dynamic Systems & Control, where he directs the Centre's research in the area of mechatronics. His research interests include smart structures, mechatronic systems, control theory and signal processing.