Energy harvesting module for the improvement of the damping performance of autonomous synchronized switching on inductance

Shunted piezoelectric transducers can be used to dissipate vibration energy of a host structure. The synchronized switch damping on inductance is a shunting technique characterized by a nearly rectangular shape of the resulting voltage on the transducer being in antiphase with the structure’s velocity. As for these systems, previous studies have reported the strong relationship between the dissipated energy and the slope of the voltage signal occurring during the switch. This implies that any electrical losses have to be minimized in order to increase the slope of the voltage signal and, thus, the damping performance. The rate of change of the voltage represents a critical issue for autonomous shunts, where the switch can be inefficient because the power for switching the circuit is not supplied by an external source but is supplied by the vibrating structure itself. In this study, a new technique for improving the damping performance of autonomous synchronized switch damping on inductance is proposed based on controlling the switch with a square wave signal that reduces its electrical losses. An experimental validation of the proposed shunting technique is carried out in order to assess the performance in both the cases of a single-tone and multimodal responses of the structure.

[1]  Adrien Badel,et al.  Nonlinear semi-passive multimodal vibration damping: An efficient probabilistic approach , 2006 .

[2]  Jean-François Deü,et al.  Structural Vibration Reduction by Switch Shunting of Piezoelectric Elements: Modeling and Optimization , 2010 .

[3]  Adrien Badel,et al.  Semi-passive Piezoelectric Structural Damping by Synchronized Switching on Voltage Sources , 2006 .

[4]  Manfred Morari,et al.  Adaptive multi-mode resonant piezoelectric shunt damping , 2004 .

[5]  Manfred Morari,et al.  An autonomous shunt circuit for vibration damping , 2006 .

[6]  Paolo Ermanni,et al.  Identification of electromechanical parameters in piezoelectric shunt damping and loss factor prediction , 2013 .

[7]  Ugo Andreaus,et al.  Effect of Electrical Uncertainties on Resonant Piezoelectric Shunting , 2007 .

[8]  Andreas Antoniou,et al.  Gyrators using operational amplifiers , 1967 .

[9]  J. Qiu,et al.  Piezoelectric vibration control by synchronized switching on adaptive voltage sources: Towards wideband semi-active damping , 2006 .

[10]  Olivier Thomas,et al.  Vibrations of an elastic structure with shunted piezoelectric patches: efficient finite element formulation and electromechanical coupling coefficients , 2009 .

[11]  William W. Clark,et al.  Comparison of low-frequency piezoelectric switching shunt techniques for structural damping , 2002 .

[12]  Nesbitt W. Hagood,et al.  Damping of structural vibrations with piezoelectric materials and passive electrical networks , 1991 .

[13]  Kon-Well Wang,et al.  Smart Structures and Materials 2003: Damping and Isolation , 2003 .

[14]  W. Clark.  Vibration Control with State-Switched Piezoelectric Materials , 2000 .

[15]  Daniel Guyomar,et al.  Sound Wave Transmission Reduction through a Plate using Piezoelectric Synchronized Switch Damping Technique , 2008 .

[16]  Claude Richard,et al.  Self-powered circuit for broadband, multimodal piezoelectric vibration control , 2008 .

[17]  Heath Hofmann,et al.  Damping as a result of piezoelectric energy harvesting , 2004 .

[18]  Ivan Giorgio,et al.  A low-power circuit for piezoelectric vibration control by synchronized switching on voltage sources , 2010 .