Systems Seminar
An Overview of Recent Innovations in Vibration Control and Damping
Using Shunted Piezoelectric Transducers
Dr. Reza Moheimani
Senior Lecturer
School of Electrical Engineering & Computer Science
The University of Newcastle, Australia
Abstract
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.
Biography
Reza Moheimani was born in Shiraz, Iran in 1967. He 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 a Senior Lecturer
in the School of Electrical Engineering and Computer Science. He
is a co-author of the research monograph ``Spatial Control of
Vibration: Theory and Experiments" (World Scientific, 2003) and
the editor of ``Perspectives in Robust Control" (Springer Verlag,
2001). He has authored over 100 technical papers. He is a senior
member of IEEE and a member of IFAC Technical Committee on
Mechatronic Systems. His research interests include smart structures,
mechatronics, control theory and signal processing.
Dr. Moheimani is an Associate Editor for Control Engineering Practice,
and International Journal of Control, Automation, and Systems. He has
served on the editorial boards of several international conferences,
and is the Chairman of the International Program Committee for the
IFAC Conference on Mechatronic Systems, to be held in Sydney, Australia
in September 2004.
Time and Place: Wed., Jan. 29, at 3:30 in 4610 Engr. Hall.
SYSTEMS SEMINAR WEB PAGE:
http://www.cae.wisc.edu/~gubner/seminar/