Enhanced piezoelectric shunt design

Article type: Research Article

Authors: Park, Chul H. | Inman, Daniel J.

Affiliations: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, KyungBuk, 790-784, Korea | Center for Intelligent Material Systems and Structures, Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0261, USA

Note: [] Corresponding author. E-mail: [email protected]

Abstract: Piezoceramic material connected to an electronic shunt branch circuit has formed a successful vibration reduction device. One drawback of the conventional electronic shunt circuit is the large inductance required when suppressing low frequency vibration modes. Also, the large internal resistance associated with this large inductance exceeds the optimal design resistance needed for low frequency vibration suppression. To solve this problem, a modified and enhanced piezoelectric shunt circuit is designed and analyzed by using mechanical-electrical analogies to present the physical interpretation. The enhanced shunt circuit developed in this paper is proved to significantly reduce the targeted vibration mode of a cantilever beam, theoretically and experimentally.

Keywords: shunt circuit, vibration damping, piezoceramic, resonant shunt, passive damping

Journal: Shock and Vibration, vol. 10, no. 2, pp. 127-133, 2003