Journal
JOURNAL OF SOUND AND VIBRATION
Volume 527, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2022.116866
Keywords
Semi-active vibration control; Synchronized switch damping; Piezoelectric; Energy injection; Vibration attenuation
Categories
Funding
- National Natural Science Foundation of China [51705251]
- Fundamental Research Funds for the Central Universities [NS2021006]
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This paper introduces an energy injection based SSD technique, which extracts electrical energy from a voltage source to increase the piezoelectric voltage for vibration reduction. The proposed technique provides simple implementation and significant effect, as confirmed by experimental results.
Synchronized switch damping (SSD) principle and derived techniques are a classical semi-active vibration control method based on piezoelectric elements. This paper presents a novel energy injection based SSD technique which has better effect of vibration reduction but with simpler implementation of electronic circuitry. The proposed circuit is composed of a flyback transformer, an ordinary low voltage source and two kinds of synchronized switches. Through controlling the synchronized switches, the electrical energy is extracted from the voltage source to the transformer, and then injected to the piezoelectric elements, increasing the piezoelectric voltage as needed. Moreover, this injection energy can be easily adjusted by changing the duty cycle of the corresponding switch control signal. The operation principle of this technique is introduced, the analytical expression of vibration attenuations is also derived for a typical electromechanical model. Finally, theoretical predictions confirmed by experimental results show that the proposed SSD technique provides an adaptive structural damping and enhances the effect of vibration attenuation.
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