Open AccessStiffness and damping effects of the rhombic piezoelectric stack transducer with a negative capacitance shunt
Author(s) -
Bo Yan,
Wei Zheng,
Shaoyi Zhou,
Wu Chen
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/531/1/012012
Subject(s) - piezoelectricity , stiffness , capacitance , shunt (medical) , negative impedance converter , transducer , materials science , vibration , acoustics , natural frequency , stack (abstract data type) , structural engineering , engineering , physics , computer science , composite material , electrical engineering , voltage , medicine , electrode , quantum mechanics , voltage source , cardiology , programming language
The piezoelectric shunt damping (PSD) is widely utilized to control structural vibrations based on its damping performance. Unlike previous studies, this work considers the stiffness and damping effects of a rhombic piezoelectric stack transducer with a negative capacitance shunt. The piezoelectric shunt stiffness (PSS) and the PSD concepts are proposed and theoretically modelled to investigate the stiffness and damping performance. The piezoelectric stack transducer with a negative capacitance can achieve both negative and positive stiffnesses to tune the natural frequency of the host structure. The root locus methods are utilized to judge the stability of the system. Both numerical simulation and experimental results demonstrate that the negative stiffness and the positive stiffness of the system greatly depend on the negative capacitance, while the damping depends on the resistance.