Affiliations: [a] State Key Laboratory for Strength and Vibration of
Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an,
Shaanxi, China | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Xinong Zhang, State Key Laboratory for
Strength and Vibration of Mechanical structures, School of Aerospace, Xi'an
Jiaotong University, NO. 28, Xianning West Road, Xi'an, Shaanxi 710049, China.
Tel.: +86 29 8266 8482; E-mail: xnzhang@mail.xjtu.edu.cn
Abstract: In this study, vibration isolation of a plate is investigated by
using an electromagnetic shunt damping vibration isolator. The isolator
consists of a box-shaped spring, a permanent magnet, an electromagnet, and a
shunt circuit. The two ends of the electromagnet connect the negative
resistance shunt impedance to constitute a circuit. In principle, the negative
resistance shunt impedance could improve the damping force by canceling the
inherent resistance of the electromagnet. The governing equation of the plate
is established according to Hamilton's principle and Galerkin's method. The
numerical simulation is conducted and the result demonstrates that the isolator
with the negative resistance shunt circuit is able to dampen the vibration of
the plate. What's more, an interesting phenomenon is that the negative
resistance shunt influences the natural frequencies of the coupling system.
Keywords: Shunt damping, negative resistance, vibration control
