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A Study on Ultra Precision Rotational Device Using Smooth Impact Drive Mechanism  

Lee, Sang-Uk (울산대학교 대학원 기계자동차공학과)
Jeon, Jong-Up (울산대학교 기계자동차공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.25, no.4, 2008 , pp. 140-147 More about this Journal
Abstract
This paper represents an ultra precision rotational device where the smooth impact drive mechanism (SIDM) is utilized as driving mechanism. Linear motions of piezoelectric elements are converted to the rotational motion of disk by frictional forces generated between the rotational disk and the friction part that is attached to the piezoelectric element. This device was designed to drive the rotational disk using slip-slip motion mechanism instead of stick-slip motion mechanism occurred in conventional impact drive mechanism. Experimental results show that the angular velocity is increased in proportion to the magnitude and frequency of supplied voltage to piezoelectric element and decreased as the preload is increased. In our device, the smooth rotational motion was obtained when the driving frequency has been reached to 500Hz under the driving voltage of 100V.
Keywords
Smooth impact drive mechanism; Precision rotational device; Piezoelectric element; Friction force;
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