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

• 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...)
• ISSN: 1045-389X; 1530-8138
• DOI: 10.1177/1045389X12436730

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.