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International Journal of Rotating Machinery
Volume 2006, Article ID 13807, 9 pages
http://dx.doi.org/10.1155/IJRM/2006/13807

Vibration and Dynamic Response Control of Nonuniform Composite Rotating Blades

1Department of Mechanical Engineering, Korea University, Seoul 136-701, Korea
2Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0219, USA
3R & D Division of Hyundai-Kia Motors, 772-1, Jangduk-Dong, Hwaseong-Si, Gyeonggi-Do 445-706, Korea

Received 9 August 2005; Accepted 2 September 2005

Copyright © 2006 Sungsoo Na 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

This paper addresses the free vibration, dynamic response, and the active control of composite rotating pretwisted blades modeled as nonuniform thin-walled beams, fixed at the hub at a setting angle, and incorporating piezoelectrically induced damping capabilities. In this sense, a distributed piezoelectric actuator system activated through the application of an out-of-phase electrical current is used to suppress the dynamic response of the rotating beam subjected to a Heaviside pulse. The blade model incorporates nonclassical effects such as transverse shear, secondary warping, and rotary inertias, and includes the centrifugal and Coriolis force fields. A velocity feedback control law relating the piezoelectrically induced bending moment at the beam tip with appropriately selected kinematical response quantities is used, and the beneficial effects of its implementation upon the closed loop eigenvibration and dynamic characteristics of the blade are highlighted.