4 A Simplified Current Blocking Piezoelectric Shunt Circuit for Multimodal Vibration Mitigation 25 (b) (a) Fig. 4.2 Considered two-degree-of-freedom system (a) and corresponding frequency response function (b): open-circuit piezoelectric transducer (-), Wu’s modified current blocking circuit [3] ( ), simplified current blocking circuit with parallel RL shunt branches ( ) and simplified current blocking shunt circuit with series RL shunt branches ( ) 4.4 Conclusion This paper presented a simplified current blocking shunt circuit able to mitigate the vibratory amplitude of multiple resonance frequencies. This new arrangement results in a reduced number of electrical components compared to previous arrangements in the literature. Thanks to the proposed tuning methodology, a near-optimal design can be obtained with limited knowledge of the electromechanical system. Acknowledgements The authors G. Raze and G. Kerschen would like to acknowledge the financial support of the SPW (WALInnov grant 1610122). References 1. Hagood, N.W., von Flotow, A.: Damping of structural vibrations with piezoelectric materials and passive electrical networks. J. Sound Vib. 146(2), 243–268 (1991) 2. Wu, S.-Y.: Piezoelectric shunts with a parallel R-L circuit for structural damping and vibration control. In: Smart Structures and Materials 1996: Passive Damping and Isolation, 2720, pp. 259–279. SPIE Press, Bellingham, WA (1996) 3. Wu, S.-Y.: Method for multiple-mode shunt damping of structural vibration using a single PZT transducer. In: Smart Structures and Materials 1998: Passive Damping and Isolation, vol. 3327, pp. 159–169. SPIE Press, Bellingham, WA (1998) 4. Behrens, S., Fleming, A.J., Moheimani, S.O.R.: Multiple mode current flowing passive piezoelectric shunt controller. J. Sound Vib. 266(5), 929–942 (2003) 5. Ciagada, A., Manzoni, S., Redaelli, M., Vanali, M.: Optimization of the current flowing technique aimed at semi-passive multi-modal vibration reduction. J. Vib. Control. 18(2), 298–312 (2012) 6. Soltani, P., Kerschen, G., Trondeau, G., Deraemaeker, A.: Piezoelectric vibration damping using resonant shunt circuits: an exact solution. Smart Mater. Struct. 23(12), 125014 (2014)
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