Abstract
Abstract This paper proposes the use of an fiber optic sensor (FOS) and electrorheological (ER) fluid actuator in the vibration active monitoring of smart composite structures. The intensity modulated fiber optic vibration sensor is developed following the face coupling theory. The characteristics of this optical fiber vibration sensor have been tested. The experimental results show that the new type intensity modulated optical fiber vibration sensor has higher sensitivity to measure the vibration frequency. At same time, our experimental investigations are focused on evaluating the elastodynamic response characteristics of a beam fabricated in an electrorheological fluid. It is noted that the most significant change in the material properties of ER fluid is the change of material stiffness and damping, which varies with the electric field intensity imposed upon ER fluid. Finally, the vibration of smart composite beam with embedded intensity modulated optical fiber vibration sensor and electrorheological fluids can be detected and controlled actively.
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