Affiliation: | a Agency for Defense Development, P.O. Box 35, Yusung-gu, Taejon 305-600, South Korea b Department of Mechanical Engineering, ME3033, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusung-gu, Taejon 305-701, South Korea c Korea Aerospace Research Institute, P.O. Box 113, Yusung-gu, Taejon 305-333, South Korea |