1. School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76, Hanggongdaehak-ro, Deogyang-gu, Goyang-si, 10540, South Korea
2. Prognostics and Analysis Team, Korea Aerospace Industries, LTD, 78, Gongdan 1-ro, Sanam-myeon, Sacheon-si, 52529, South Korea