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Sensors 2017, 17(7), 1510; doi:10.3390/s17071510

Research on a Novel Exciting Method for a Sandwich Transducer Operating in Longitudinal-Bending Hybrid Modes

State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China
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Received: 4 May 2017 / Revised: 6 June 2017 / Accepted: 21 June 2017 / Published: 27 June 2017
(This article belongs to the Special Issue Piezoelectric Micro- and Nano-Devices)
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Abstract

A novel exciting method for a sandwich type piezoelectric transducer operating in longitudinal-bending hybrid vibration modes is proposed and discussed, in which the piezoelectric elements for the excitations of the longitudinal and bending vibrations share the same axial location, but correspond to different partitions. Whole-piece type piezoelectric plates with three separated partitions are used, in which the center partitions generate the first longitudinal vibration, while the upper and lower partitions produce the second bending vibration. Detailed comparisons between the proposed exciting method and the traditional one were accomplished by finite element method (FEM) calculations, which were further verified by experiments. Compared with the traditional exciting method using independent longitudinal ceramics and bending ceramics, the proposed method achieves higher electromechanical coupling factors and larger vibration amplitudes, especially for the bending vibration mode. This novel exciting method for longitudinal-bending hybrid vibrations has not changed the structural dimensions of the sandwich transducer, but markedly improves the mechanical output ability, which makes it very helpful and meaningful in designing new piezoelectric actuators operated in longitudinal-bending hybrid vibration modes. View Full-Text
Keywords: piezoelectric transducer; longitudinal vibration; bending vibration; exciting method; electromechanical coupling factor piezoelectric transducer; longitudinal vibration; bending vibration; exciting method; electromechanical coupling factor
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Liu, Y.; Shen, Q.; Shi, S.; Deng, J.; Chen, W.; Wang, L. Research on a Novel Exciting Method for a Sandwich Transducer Operating in Longitudinal-Bending Hybrid Modes. Sensors 2017, 17, 1510.

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