Impact drive rotary precision actuator
with piezoelectric bimorphs

doi:10.1007/s11465-008-0008-3

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Front. Mech. Eng. ›› 2008, Vol. 3 ›› Issue (1) : 71-75. DOI: 10.1007/s11465-008-0008-3

Impact drive rotary precision actuator with piezoelectric bimorphs

ZHANG Hongzhuang, ZENG Ping, HUA Shunming, CHENG Guangming, YANG Zhigang

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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.

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ZHANG Hongzhuang, ZENG Ping, HUA Shunming, CHENG Guangming, YANG Zhigang. Impact drive rotary precision actuator with piezoelectric bimorphs. Front. Mech. Eng., 2008, 3(1): 71‒75 https://doi.org/10.1007/s11465-008-0008-3

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