Design and testing of a novel piezoelectric micro-motor actuated by asymmetrical inertial impact driving principle

Ping Zeng; Shujie Sun; Li'an Li; Feng Xu; Guangming Cheng

doi:10.1063/1.4867455

Design and testing of a novel piezoelectric micro-motor actuated by asymmetrical inertial impact driving principle

Rev Sci Instrum. 2014 Mar;85(3):035002. doi: 10.1063/1.4867455.

Authors

Ping Zeng¹, Shujie Sun¹, Li'an Li¹, Feng Xu¹, Guangming Cheng²

Affiliations

¹ College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China.
² Institute of Precision Machinery, Zhejiang Normal University, Jinhua, China.

PMID: 24689611
DOI: 10.1063/1.4867455

Abstract

In this paper, an asymmetrical inertial impact driving principle is first proposed, and accordingly a novel piezoelectrically actuated linear micro-motor is developed. It is driven by the inertial impact force generated by piezoelectric smart cantilever (PSC) with asymmetrical clamping locations during a driving cycle. When the PSC is excited by typical harmonic voltage signals, different equivalent stiffness will be induced due to its asymmetrical clamping locations when it is vibrating back and forth, leading to a tiny displacement difference on the two opposite directions in a cycle, and then the accumulation of tiny displacement difference will allow directional movements. A prototype of the proposed motor has been developed and investigated by means of experimental tests. The motion and dynamics characteristics of the prototype are well studied. The experimental results demonstrate that the resolution of the micro-motor is 0.02 μm, the maximum velocity is 16.87 mm/s, and the maximum loading capacity can reach up to 1 kg with a voltage of 100 V and 35 Hz.