A new vibration damping method using a semi-passive control

• Autorzy: Guyomar D. , Richard C. , Audigier D.
• Konferencja: Proceedings of the 2 nd EAA International Symposium on Hydroacoustics 24-27 May 1999, Gdańsk-Jurata POLAND
• Języki publikacji: EN

Abstrakty

EN

A new damping system, based on piezoceramics shunted with a specific time sequence, is presented: Unlike ofher passive devices, the dissipation does nof occur in a resistance or in a resistor/inductor circuit. The basic idea is to adequately deform the piezo output voltage waveform in order to create a phase shift between the output voltage and the mechanical displacement. The voltage distortion is obtained by switching from short circuit to an open circuit configuration in a repetitive sequence synchronous with the mofion. The switching removes periodically the electric charges from the piezoelectric elements, changes the mechanical overall stiffness and creates non-linearities, thus creating several dissipations mechanisms. Experiments have been run on a cantilever device equipped with ceramic plates and a switching network. The results show a damping level higher that what is achievable with a passive circuit approach. Furthermore, the proposed approach works over a large bandwidth thus leading to important reduction for transient vibration.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1999
• Tom: Vol. 2
• Strony: 173--178
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Guyomar D.

• INSA - Laboratoire de Genie Electrique et Ferroelectricite- 69621 Villeurbanne cedex – France

autor

Richard C.

• INSA - Laboratoire de Genie Electrique et Ferroelectricite- 69621 Villeurbanne cedex – France

autor

Audigier D.

• INSA - Laboratoire de Genie Electrique et Ferroelectricite- 69621 Villeurbanne cedex – France

Bibliografia

• 1. N.W. Hagood, A. von Flofow, Damping of structural vibrations with piezoelectric materials and passive electricaI networks, Journal of Sound and Vibrations - Vol. 146, no.2, pp. 243- 268, (1991)
• 2. C.L. Davis, G.A. Lesieutre, A model strain energy approach to the prediction of resistively shunted piezoceramic damping , JournaI of Sound and Vibrations - Vol. 184, no. 1, pp. 129- 139, (1995)
• 3. S. Y. WIJ, A. S. Bicos, Structural vibration damping experiments using improved piezoelectric shunts, SPIE Vol. 3045, Ref. 0277- 786X197 pp. 40-50, (1997).
• 4. IEEE Standard on Piezoelectricity. ANSI/IEEE-Std 176-1987.