Resonant-type Smooth Impact Drive Mechanism (SIDM) actuator using a bolt-clamped Langevin transducer

Takuma Nishimura; Hiroshi Hosaka; Takeshi Morita

doi:10.1016/j.ultras.2011.06.013

Resonant-type Smooth Impact Drive Mechanism (SIDM) actuator using a bolt-clamped Langevin transducer

Ultrasonics. 2012 Jan;52(1):75-80. doi: 10.1016/j.ultras.2011.06.013. Epub 2011 Jul 1.

Authors

Takuma Nishimura¹, Hiroshi Hosaka, Takeshi Morita

Affiliation

¹ Graduate School of Frontier Sciences, The University of Tokyo 5-1-5 Kashiwano-ha, Kashiwa 277-8563, Japan.

PMID: 21784499
DOI: 10.1016/j.ultras.2011.06.013

Abstract

The Smooth Impact Drive Mechanism (SIDM) is a linear piezoelectric actuator that has seen practically applied to camera lens modules. Although previous SIDM actuators are easily miniaturized and enable accurate positioning, these actuators cannot actuate at high speed and cannot provide powerful driving because they are driven at an off-resonant frequency using a soft-type PZT. In the present study, we propose a resonant-type SIDM using a bolt-clamped Langevin transducer (BLT) with a hard-type PZT. The resonant-type SIDM overcomes the above-mentioned problems and high-power operation becomes possible with a very simple structure. As a result, we confirmed the operation of resonant-type SIDM by designing a bolt-clamped Langevin transducer. The properties of no-load maximum speed was 0.28m/s at driving voltages of 80V(p-p) for 44.9kHz and 48V(p-p) for 22.45kHz with a pre-load of 3.1N.