TY - GEN
T1 - Power output and dissipation of a negative capacitance shunt coupled to piezoelectric transducers
AU - Beck, Benjamin
AU - Cunefare, Kenneth A.
AU - Collet, Manuel
PY - 2011
Y1 - 2011
N2 - A negative capacitance shunt is a basic, analog, active circuit electrically connected to a piezoelectric transducer to control vibrations of flexural bodies. The electrical impedance of the negative capacitance shunt modifies the effective modulus of the piezoelectric element to reduce the stiffness and increase the damping which causes a decrease in amplitude of the vibrating structure to which the elements are bonded. The negative capacitance circuit is built around a single operational amplifier using passive circuit elements. To gain insight into the electromechanical coupling, the power consumption of the opamp and the power dissipated in the resistive element are measured. The power output of the op-amp increases for increasing control gain of the negative capacitance. The power characteristics of the shunt are compared to the reactive input power analysis developed in earlier work.
AB - A negative capacitance shunt is a basic, analog, active circuit electrically connected to a piezoelectric transducer to control vibrations of flexural bodies. The electrical impedance of the negative capacitance shunt modifies the effective modulus of the piezoelectric element to reduce the stiffness and increase the damping which causes a decrease in amplitude of the vibrating structure to which the elements are bonded. The negative capacitance circuit is built around a single operational amplifier using passive circuit elements. To gain insight into the electromechanical coupling, the power consumption of the opamp and the power dissipated in the resistive element are measured. The power output of the op-amp increases for increasing control gain of the negative capacitance. The power characteristics of the shunt are compared to the reactive input power analysis developed in earlier work.
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U2 - 10.1115/smasis2011-5099
DO - 10.1115/smasis2011-5099
M3 - Conference contribution
AN - SCOPUS:84859538169
SN - 9780791854723
T3 - ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2011
SP - 261
EP - 270
BT - ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2011
PB - American Society of Mechanical Engineers
T2 - ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2011
Y2 - 18 September 2011 through 21 September 2011
ER -