Affiliations: [a] State Key Laboratory of Mechanics and Control for
Mechanical Structures, Nanjing University of Aeronautics and Astronautics,
#29 Yudao Street, Nanjing 210016, China | [b] Institute of Fluid Science, Tohoku University,
Katahira 2-1-1, Aobaku, Sendai 980-8577, Japan
Abstract: This paper presents a new synchronized switch circuit for
piezoelectric semi-active vibration control. Recently, Synchronized Switching
Damping (SSD) controllers have been used to switch piezoelectric materials in
order to damp vibration. In contrary to standard active and passive
piezoelectric damping, these switching shunt circuits allow a small
implementation and require only little power and, moreover, they offer the
advantage of self-adaptation with environmental variations and their broadband
frequency efficiency. However, the control performance of previous SSD
approaches relies on the electrical quality factor of the switch circuit. This
paper presents a novel form of the SSD with a negative capacitance, which is to
maintain the environmental adaptation and bypass the influence of the quality
factor to the damping system. The expression of the vibration attenuation at
the resonance frequency is derived, and the effectiveness of this new circuit
design is demonstrated by comparing with SSDI and negative capacitance shunt
passive control of a resonant cantilever composite beam with embedded
piezoelectric patch. Theoretical predictions and experimental results show a
remarkable attenuation on the vibration of cantilever beam, which excels the
other two techniques.
