Impact drive rotary precision actuator with piezoelectric bimorphs

2008, Volume 3, Issue 1

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Frontiers of Mechanical Engineering >> 2008, Volume 3, Issue 1 doi: 10.1007/s11465-008-0008-3

Impact drive rotary precision actuator with piezoelectric bimorphs

College of Mechanical Science and Engineering, Jilin University;

Available online: 2008-03-05

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Abstract

An impact drive rotary precision actuator with end-loaded piezoelectric cantilever bimorphs is proposed. According to finite element analysis and experiments of the dynamic characteristics of end-loaded piezoelectric cantilever bimorphs, a specific fixed-frequency and adjustable-amplitude is confirmed to control the actuator. The results show that an actuator excited by fixed-frequency and the adjustable-amplitude ramp voltage waveform works with a large travel range (180°), high resolution (1 ?rad), speed (0.2 rad/min) and heavy-load ability (0.02 Nm). With advantages of high-precision positioning ability, simple structure and only one percent the cost of traditional impact drive mechanisms, the actuator is expected to be widely used in precision industries.

Keywords

specific fixed-frequency ; waveform ; piezoelectric cantilever ; mechanisms ; adjustable-amplitude

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