In this work, a novel ultrasonic actuator, composed of a Langevin transducer and of a displacement amplifier vibrating in a flexural mode, is proposed, designed and experimentally characterized. The displacement amplifier is composed of a cylinder shaped base with the same radius of the Langevin transducer, of four arms, and of a thin disk acting as a displacement collector. The displacement amplifier is able to transform the almost flat axial displacement provided by the Langevin transducer at its back end into a flexural deformation that produces the maximum axial displacement at the center of its front end. Design and analysis of the actuator have been performed by using a FEM software. In analogy to classical power actuators, the design criterion that has been followed was to separately design the Langevin transducer and the flexural amplifier at the same working frequency. Simulated results have shown that the proposed actuator presents two close working frequencies, which exhibits comparable maximum displacements even if with different deformed shapes. Measurements carried out on a manufactured prototype are presented and discussed.

Fe Analysis of a High Displacement Ultrasonic Actuator Based on a Flexural Mechanical Amplifier

IULA, Antonio;
2007-01-01

Abstract

In this work, a novel ultrasonic actuator, composed of a Langevin transducer and of a displacement amplifier vibrating in a flexural mode, is proposed, designed and experimentally characterized. The displacement amplifier is composed of a cylinder shaped base with the same radius of the Langevin transducer, of four arms, and of a thin disk acting as a displacement collector. The displacement amplifier is able to transform the almost flat axial displacement provided by the Langevin transducer at its back end into a flexural deformation that produces the maximum axial displacement at the center of its front end. Design and analysis of the actuator have been performed by using a FEM software. In analogy to classical power actuators, the design criterion that has been followed was to separately design the Langevin transducer and the flexural amplifier at the same working frequency. Simulated results have shown that the proposed actuator presents two close working frequencies, which exhibits comparable maximum displacements even if with different deformed shapes. Measurements carried out on a manufactured prototype are presented and discussed.
2007
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/29037
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