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.
Iula, A., Parenti, L., Fabrizi, F., Pappalardo, M. (2006). A high displacement ultrasonic actuator based on a flexural mechanical amplifier. SENSORS AND ACTUATORS. A, PHYSICAL, 125(2), 118-123 [10.1016/j.sna.2005.08.017].
A high displacement ultrasonic actuator based on a flexural mechanical amplifier
PAPPALARDO, Massimo
2006-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
