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라주혁(J. H. RA),임재현(J. H. LIM),전신현(S. H. JEON),정명진(M. J. CHUNG) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Segway is spotlighted the means of transportation using the electric batteries. In this paper, the attitude control method of the Segway is proposed. The design of the Segway is conducted using the mathematical and computational analysis in the selection of motor, sensor, and thickness of body frame. The PID controller is used to control the Segway. The PID gain values are adjusted using the Ziegler-Nichols method. In this study, useful information as design and control method is suggested for those interested in the development of the Segway.
가스분무법에 의한 Fe계 비정질 분말의 제조와 볼밀링공정에 의한 연질 Cu 분말과의 복합화 및 SPS 거동 (I) - I. 가스분무 및 복합화 -
류호진,임재현,김지순,김진천,김휘준,Ryu, Ho-Jin,Lim, Jae-Hyun,Kim, Ji-Soon,Kim, Jin-Chun,Kim, H.J. 한국분말야금학회 2009 한국분말재료학회지 (KPMI) Vol.16 No.5
Fe based (Fe$_{68.2}$C$_{5.9}$Si$_{3.5}$B$_{6.7}$P$_{9.6}$Cr$_{2.1}$Mo$_{2.0}$Al$_{2.0}$) amorphous powder, which is a composition of iron blast cast slag, were produced by a gas atomization process, and sequently mixed with ductile Cu powder by a mechanical ball milling process. The experiment results show that the as-prepared Fe amorphous powders less than 90 $\mu$m in size has a fully amorphous phase and its weight fraction was about 73.7%. The as-atomized amorphous Fe powders had a complete spherical shape with very clean surface. Differential scanning calorimetric results of the as-atomized Fe powders less than 90 $\mu$m showed that the glass transition, T$_g$, onset crystallization, T$_x$, and super-cooled liquid range $\Delta$T=T$_x$-T$_g$ were 512, 548 and 36$^{\circ}C$, respectively. Fe amorphous powders were mixed and deformed well with 10 wt.% Cu by using AGO-2 high energy ball mill under 500 rpm.