• Optics and Precision Engineering
  • Vol. 27, Issue 10, 2215 (2019)
ZHOU Jing-tao*, HE Zhong-bo, BAI Guo, and LIU Guo-ping
Author Affiliations
  • [in Chinese]
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    DOI: 10.3788/ope.20192710.2215 Cite this Article
    ZHOU Jing-tao, HE Zhong-bo, BAI Guo, LIU Guo-ping. Modeling and experiment of static and dynamic characteristics of inchwormgiant magnetostrictive rotary actuator[J]. Optics and Precision Engineering, 2019, 27(10): 2215 Copy Citation Text show less

    Abstract

    In order to meet the requirements of large-stroke and high-precision rotating motion, an inchworm giant magnetostrictive rotary actuator was designed based on the principle of inchworm cumulative stepping angular displacement. With a giant magnetostrictive rod as the power source and a right-angle flexure hinge as the springback element, the stepping angular displacement output of the rotor was realized by applying a specific excitation timing signal to make the clamping mechanism and driving mechanism cooperate effectively. The static and dynamic characteristics of rectangular flexure hinges were analyzed by simplifying them into statically indeterminate beams, and a spatial mechanical model was established. The experimental test system was built, and the output performance, clamping stability, and stability of the output angular displacement of the inchworm magnetostrictive rotary actuator were tested. The experimental results show that when the driving voltage is 4.5 V and the frequency is 2 Hz, the average one-step angular displacement is 278.81 μrad, the maximum error is 7.92 μrad, the maximum relative error is 2.83%, and the radial run-out of the clamping mechanism is less than 1.35 μm. The rotary actuator works stably and reliably with a high output precision, which can rotate 360°. The calculated results of the model are in agreement with the experimental results. The maximum error is 12.11 μrad and the maximum relative error is 4.34%.
    ZHOU Jing-tao, HE Zhong-bo, BAI Guo, LIU Guo-ping. Modeling and experiment of static and dynamic characteristics of inchwormgiant magnetostrictive rotary actuator[J]. Optics and Precision Engineering, 2019, 27(10): 2215
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