1 Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, Pil-dong, Jung-gu, Seoul, 100-715, South Korea.
2 Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, Pil-dong, Jung-gu, Seoul, 100-715, South Korea. heungsoo@dgu.edu.
3 Department of Mechanical Engineering, Inha University, Inha-ro 100, Nam-gu, Incheon, 402-751, South Korea.
4 Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, Pil-dong, Jung-gu, Seoul, 100-715, South Korea. joohyung.kim@inha.ac.kr.
5 Department of Mechanical Engineering, Inha University, Inha-ro 100, Nam-gu, Incheon, 402-751, South Korea. joohyung.kim@inha.ac.kr.