文档介绍：Composite Structures 76 (2006) 362–374
pstruct
Active damping of posite thin-walled beams
using MFC actuators and PVDF sensors
Seung-Chan Choi, Jae-Sang Park, Ji-Hwan Kim *
School of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu,
Seoul 151-744, Republic of Korea
Available online 21 June 2005
Abstract
The object of this research is to enhance the damping performance for vibration suppression of posite thin-
walled beams using MFC actuators and PVDF sensors. The formulation is based on single posite beam including a
warping function, centrifugal force, Coriolis acceleration and piezoelectric effect. Adaptive capability of the beam is acquired
through the use of a negative velocity feedback control algorithm. Numerical analysis is performed using finite element
method and Newmark time integration method is used to calculate the time response of the model. It is observed that
the feedback control gain has an effect on damping performance. The paper continues with an investigation into influences
of parameters such as the rotating speed and the fiber orientation in host structures. Also, it is confirmed that effective
damping performance is achievable through the suitable arrangement and distributed size of sensor and actuator pair using
case study.
Ó 2005 Elsevier Ltd. All rights reserved.
Keywords: posite thin-walled beam; posite materials; MFC; Active damping; Negative velocity feedback control
1. Introduction are classified into passive method and active method.
Recently, the later has been focus of research,
Thin-walled beams have significant applications in because it can be allowed the adaptability according to
aerospace engineering and other industries. Helicopter circumstances.
blades, tilt-rotor aircraft blades, flexible robot arms Numerous researches have been conducted -
and wind turbines are representative examples of struc- posite thin-walled beams. Rehfield [1] studied the design