A high displacement ultrasonic actuator based on a flexural mechanical amplifier
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- 作者：Antonio Iula ; Lorenzo Parenti ; Fabio Fabrizi and Massimo Pappalardo
- 关键词：Transducer ; Ultrasonic ; Piezoelectric actuator ; Finite element method
- 刊名：Sensors and Actuators A: Physical
- 出版年：2006
- 出版时间：10 January 2006
- 年：2006
- 卷：125
- 期：2
- 页码：118-123
- 全文大小：281 K
文摘
Commonly used high displacement ultrasonic actuators are composed of a Langevin transducer and of a sectional ultrasonic concentrator working as a displacement amplifier. In this work, a novel ultrasonic actuator, which exploits a displacement amplifier vibrating in a flexural mode, is proposed. Design and analysis of the actuator have been performed by using a FEM software. Performances of the proposed actuator have been evaluated by using a classical ultrasonic actuator, based on a stepped horn concentrator, as a benchmark. Simulated results have shown that the flexural amplifier exhibits a displacement amplification about 50 % higher than that of the stepped horn; furthermore, due to its capability to absorb a higher electrical power, the whole actuator has shown a maximum displacement that is twice the maximum displacement of the stepped horn actuator. Simulated results have been validated by measurements carried out on two manufactured prototypes.