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정순종(Soonjong Jeong),김민수(MinSoo Kim),이대수(Daesu Lee),박언철(Eonchul Park),홍원표(Younpyo Hong),강은구(Eungu Kang),최원종(Wonjong Choi) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
This paper presents a novel way to reduce hysteresis in piezoelectric actuator by connecting the actuator with a capacitor in a series circuit. The change in hysteresis with respect to the capacitor was examined. 0.2Pb(Mg1/3Nb2/3)O₃-0.8Pb(Zr?.₄?? Ti?.?₂?)O₃ ceramic material was used as a piezoelectric material for the actuator. Displacement of the actuator was measured in a capacitive gap sensor measuring system. In case of inserting a capacitor in a total circuit, hysteresis became dramatically decreased, and then finally the hysteresis value can be reduced below 0.3%.
정순종,고중혁,송재성,홍원표,최원종 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
This study presents the combined effect of electric field application and mechanical compressive stress loading on deformation in a multilayer ceramic actuator, designed with stacking alternatively 0.2(PbMn_(1/3)Nb_(2/3)O₃)-0.8(PbZr_(0.475))Ti_(0.525)O₃) ceramics and Ag-Pd electrode. The deformation behaviors were thought to be attributed to relative 180°domain quantities which is determined by pre-loaded stress and electric field. The non-linearity of piezoelectricity and strain are dependent upon the young's modulus resulting from the domain reorientation.