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Shock and Vibration
Volume 2014, Article ID 712426, 10 pages
http://dx.doi.org/10.1155/2014/712426
Research Article

Active Elastic Support/Dry Friction Damper with Piezoelectric Ceramic Actuator

School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China

Received 12 September 2013; Revised 9 March 2014; Accepted 14 March 2014; Published 6 April 2014

Academic Editor: Jeong-Hoi Koo

Copyright © 2014 Liao Mingfu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The basic operation principle of elastic support/dry friction damper in rotor system was introduced and the unbalance response of the rotor with elastic support/dry friction damper was analyzed theoretically. Based on the previous structure using an electromagnet as actuator, an active elastic support/dry friction damper using piezoelectric ceramic actuator was designed and its effectiveness of reducing rotor vibration when rotor traverses its critical speed and blade-out event happened was experimentally verified. The experimental results show that the active elastic support/dry friction damper with piezoelectric ceramic actuator can significantly reduce vibration in rotor system; the vibration amplitude of the rotor in critical speed region decreased more than 2 times, and the active damper can protect the rotor when a blade-out event happened, so the rotor can traverse the critical speed and shut down smoothly. In addition, the structure is much simpler than the previous, the weight was reduced by half and the power consumption was only 5 W.