Numéro |
J. Phys. IV France
Volume 128, September 2005
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Page(s) | 171 - 176 | |
DOI | https://doi.org/10.1051/jp4:2005128026 |
J. Phys. IV France 128 (2005) 171-176
DOI: 10.1051/jp4:2005128026
Semi-passive piezoelectric noise control in transmission by synchronized switching damping on voltage source
A. Faiz, D. Guyomar, L. Petit and C. ButtayLaboratoire de Génie Électrique et Ferroélectricité (LGEF), INSA de Lyon, 8 rue de la Physique, 69621 Villeurbanne Cedex, France
Abstract
This paper deals with the so called SSD (stands for
Synchronized Switch Damping) technique that is a semi-passive approach
developed to address the problem of structural vibration damping and noise
reduction. Compared to standard passive piezoelectric damping, this
technique offers the advantage of self-adaptation with environmental
variations (e.g. temperature). On the contrary to the active damping
systems, its implementation does not require any sophisticated signal
processing or any bulk power. In the semi passive approach, the
piezoelectric element is continuously switched from open circuit to short
circuit synchronously to the strain. Due to this switching mechanism, a
phase difference appears between the strain induced by an incident acoustic
wave and the resulting voltage, thus creating energy dissipation. With the
non-linear process, damping performances directly depend on the
electromechanical coupling coefficient of the system. For the weakly
coefficient coupling systems, the voltage amplitude of the piezoelectric
elements can be artificially increased by switching on voltage sources.
Using this new method SSDV (stands for Synchronized Switch Damping on
Voltage source), 16.1 dB attenuation on the transmitted wave pressure in the
tube is obtained whereas only 8 dB were achieved with the classical SSDI
(stands for Synchronized Switch Damping on Inductor). Furthermore, as this
method is adaptive, attenuation is observed over a 600 Hz-wide frequency
band.
© EDP Sciences 2005