Design Radiation Mode Sensors Based on Piezoelectric Fibers for Beam Structures

Abstract:

This paper presents a new method for sensing the radiation mode amplitudes by using piezoelectric fibers for vibrating beams with different boundary conditions. Two straight and one curved fibers bonded on the surface of the beam are taken as a sensor. The sensor output is defined as the output current of the curved fiber subtracting the output currents of the other two straight fibers. By means of designing the appropriate shape of the curved piezoelectric fiber, the sensor output can directly lead to the corresponding radiation mode amplitude of the beam. The equations which define the curved sensor shapes are independent of the type and position of the external excitation. Finally, a numerical example is given and the effects of shape error and location error of such type sensor are discussed.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 37-41
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.37
• Online since: February 2013
• Authors: Qi Bo Mao
• Keywords: Location Error, Piezoelectric Fiber, Radiation Mode, Shape Error, Structural Vibration

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