Shunted piezoelectric transducers can be used to dissipate vibration energy of a host structure. The Synchronized Switch Damping on Inductance (SSDI) is a shunting technique featured by a nearly rectangular shape of the resulting voltage on the transducer being in anti-phase with the structure’s velocity. As for these systems, previous studies have reported the strong connection of the dissipated energy on 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 of the shunt. Moreover, the rate of change of the voltage signal 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 switching shunt is proposed based on reducing the electrical losses of the switch. Finally, an experimental validation of the novel shunting technique is carried out.
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Piezoelectric Vibration Damping Using Autonomous Synchronized Switching on Inductance
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Delpero, T, Di Lillo, L, Bergamini, A, & Ermanni, P. "Piezoelectric Vibration Damping Using Autonomous Synchronized Switching on Inductance." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 427-433. ASME. https://doi.org/10.1115/SMASIS2011-5239
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