Affiliation: | a Department of Robot System Engineering, Tongmyong University of Information Technology, Yongdang-dong 535, Nam-gu, Busan City, South Korea b Samsung Corning Industry Corporation, Mechatronics Group, Kweonsun-gu, Suwon City, South Korea c Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Gusong-dong, Yusong-gu, Daejun, South Korea |