Measurement of mechanical and electrical energy flows in the semiactive piezoelectric shunt damping system

The analysis of the mechanical and electric energy flows in the semiactive vibration control system, which is made of a piezoelectric actuator shunted by a negative capacitor, is presented. The vibration control system is designed to suppress the vibration transmission in a narrow frequency range. U...

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Bibliographic Details
Published in:Journal of intelligent material systems and structures 2012-03, Vol.23 (5), p.527-533
Main Authors: VACLAVIK, Jan, MOKRY, Pavel
Format: Article
Language:English
Subjects:
Damping
Electric power generation
Electronics
Energy flow
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Measurement and testing methods
Noise levels
Physics
Piezoelectricity
Solid mechanics
Structural and continuum mechanics
Vibration
Vibration control
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:The analysis of the mechanical and electric energy flows in the semiactive vibration control system, which is made of a piezoelectric actuator shunted by a negative capacitor, is presented. The vibration control system is designed to suppress the vibration transmission in a narrow frequency range. Using a proper adjustment of the electronic circuit elements, the transmissibility of vibrations has been suppressed by 35 dB at the frequency of 1.5 kHz. The results of our measurements indicate that the average apparent electrical power in the electric part of the vibration control device is about 100 times larger than the mechanical power, which is supplied to the system from the source of vibrations. The rules for designing the highly efficient and low-power electronic parts of semiactive vibration control systems are discussed.
ISSN:1045-389X
1530-8138
DOI:10.1177/1045389X12436730