Affiliations: Department of Mechanical Engineering, Jadavpur
University, Kolkata, India | Department of Applied Mechanics, Birla Institute of
Technology, Mesra Ranchi, India | Institute for Mechanics, University of Kassel, Kassel,
Germany
Note: [] Corresponding author: Department of Mechanical Engineering,
Jadavpur University, Kolkata 700 032, India. E-mail: [email protected];
[email protected]
Abstract: The present work proposes a non-contact vibration attenuator made up
of a permanent magnet mounted on a piezoelectric stack. Two such actuators are
made to work simultaneously in a 'twin-actuator' configuration. It is conceived
that a controlled change in the gap between the actuator and the structure is
capable of attenuation of vibration of the structure. This appropriate change
in gap is achieved by controlled motion of the piezoelectric stacks. It is
shown that the actuator works as an active damper when the extension and
contraction of the actuators are made proportional to the velocity of the beam.
The resolution of extension of a piezoelectric stack is in the order of
nanometers. Thus in the proposed actuator the force of actuation can be applied
with great precision. This actuator is also attractive for its simple
constructional feature.
