11 April 2017 A continuous switching model for piezoelectric state switching methods
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Piezoelectric-based, semi-active vibration reduction approaches have been studied for over a decade due to their potential in controlling vibration over a large frequency range. Previous studies have relied on a discrete model when switching between the stiffness states of the system. In such a modeling approach, the energy dissipation of the stored potential energy and the transient dynamics, in general, are not well understood. In this paper, a switching model is presented using a variable capacitance in the attached shunt circuit. When the switch duration is small in comparison to the period of vibration, the vibration reduction performance approaches that of the discrete model with an instantaneous switch, whereas longer switch durations lead to less vibration reduction. An energy analysis is then performed that results in the appearance of an energy dissipation term due to the varying capacitance in the shunt circuit.
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Garrett K. Lopp, Garrett K. Lopp, Jeffrey L. Kauffman, Jeffrey L. Kauffman, } "A continuous switching model for piezoelectric state switching methods", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101641W (11 April 2017); doi: 10.1117/12.2260392; https://doi.org/10.1117/12.2260392

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