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14 November 1997 Development of a large-amplitude piezoelectric torsional actuator
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A noble torsional actuator that will produce somewhat large rotational angle is developed. The actuator comprises of a piezoelectric torsional actuator and a torsional resonator. The piezoelectric actuator is specially designed such that the resonance frequency of the first torsional mode coincides with the external excitation frequency. The torsional resonator is made with torsion bar, and the resonance frequency of the bar is also matched with that of the piezoelectric actuator. By matching these natural frequencies, large torsional amplitude is generated. Theoretical and numerical works to design such a device are performed. For a special application, for example, laser scanning unit (LSU), the instantaneous rotation angle of the device is controlled such that a desired trajectory is generated. The development of such device will results in substitution of the conventional polygon mirror in LSU with the new device, and high speed laser printing could be possible.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jaehwan Kim and Hak Rae Chi "Development of a large-amplitude piezoelectric torsional actuator", Proc. SPIE 3241, Smart Materials, Structures, and Integrated Systems, (14 November 1997);

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