A new electrical circuit with negative capacitances to enhance resistive shunt damping
TypeCommunications avec actes
This article proposes a new layout of electrical network based on two negative capacitance circuits, aimed at increasing the performances of a traditional resistive piezoelectric shunt for structural vibration reduction. It is equivalent to artificially increase the modal electromechanical coupling factor of the electromechanical structure by both decreasing the short-circuit natural frequencies and increasing the open-circuit ones. This leads to higher values of the modal electromechanical coupling factor with respect to simple negative capacitance configurations, when the same margin from stability is considered. This technique is shown to be powerful in enhancing the control performance when associated to a simple resistive shunt, usually avoided because of its poor performances.
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Improved resistive shunt by means of negative capacitance: new circuit, performances and multi-mode control BERARDENGO, Marta; THOMAS, Olivier; GIRAUD-AUDINE, Christophe; MANZONI, Stefano (IOP publishing, 2016)This paper deals with vibration control by means of piezoelectric patches shunted with electrical impedances made up by a resistance and a negative capacitance. The paper analyses most of the possible layouts by which a ...
BERARDENGO, Marta; THOMAS, Olivier; GIRAUD-AUDINE, Christophe; MANZONI, Stefano (SAGE, 2016)This paper deals with piezoelectric shunt damping enhanced with negative capacitances. A novel electrical circuit layout is addressed, based on the use of two negative capacitances. It is shown that the shunt performances, ...
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NADAL, Clément; GIRAUD-AUDINE, Christophe; GIRAUD, Frédéric; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (IEEE, 2014)This paper deals with an unidimensional analytical modelling of the vibratory behaviour of a rectangular beam excited by several piezoelectric ceramics glued on its lower face. The establishment of the equations of motion ...